Deceleration Backfire: Easy Carb Tuning

Check out how easy it is to tune your carbs to eliminate deceleration backfire.
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[@TheMotorcycleMD]

►► Check out my step by step video guides to cleaning carburetors -www.themotorcyclemd.com/pro-carb-cleans

[@davo8802]

A 99 honda magna has 4 carburetors. Is this possible on 4 carbs? Can u get to all 4 plugs?

[@davidreynolds4684]

Sounds like it's starving for air

[@davidreynolds4684]

Good looking bike but I'm not a fan of those style pipes. They make nearly every bike no matter what it is sound like a 250 rebel

[@davidreynolds4684]

Sounds like new.

[@tubbygreyed5636]

As a long-time mechanic it was a pleasure to watch a much younger mechanic work his magic. The video was well explained and thorough. Thanks for sharing your knowledge with others.

[@TheMotorcycleMD]

Tubby Greyed Thank you for the encouragement/compliments Brother. Speaking the language of fellow riders and techs allows me to bring more value to viewers. 🤙

[@johnDukemaster]

Tubby: My words sir!

[@tracydickson5876]

Love your presentation...by far the best explanation of the way the machine works i have ever heard.I recently acquired a 750 shadow spirit and am hungry for advice.This was spot-on advice for me...Thank You!!

[@dwainsmith6853]

Kool guy man yes great video

[@mikga45]

Great vid, you explain the adjustments well. The vid can help people who need to get their bike running correctly. Thanks. Subscribed.

[@letsskydecipherandfindout54]

Young man I've been in motorcycle business half my life and you remind me of just a small few that has the enjoyment from performing such a simple operation for everyone to understand like a pro. No music no clattering on about how your day went with your dog and you got a flat tire on the way home just straight to hey pay attention grasshopper pause the video any section of the way if you get lost you're right there with us thank you your career is for us to enjoy the training thank you

[@johnegadget]

Cody, Just applied your video Deceleration Backfire: Tuning your carburetor. I have the same exact 2003 Honda VT750 you did the video on... It took care of the problem and actually sounds great. I just want to thank you for taking the time and posting it. I followed it to the T and all went well. Thanks again. John

[@TheMotorcycleMD]

John Masell Hey John, so glad that you were able to apply this video directly to your own bike! It is very satisfying and encouraging to hear this! Cheers brother!

[@mrblacktrh]

Thanks for having the balls to try imitating the engine sound. It actually helped understanding. ❤️

[@johnk2260]

It’s a big thing music people do too with certain sounds 😉🤷‍♂️

[@dankcincy]

Rawr

[@jerrys2346]

This is the best video I've found on KZbin for proper adjustment of the fuel mixture after changing jets, pipes or airbox. Plus, you are an excellent teacher.

[@evanmorrow1234]

Good stage presence and "flow" to the video with no wasted moves. Clearly visible view on each part of the procedure with accurate and concise explanations and even a little theory behind it all. This video is a solid 10 on the Richter scale. I already knew it all and worked at a couple of shops in the past actually. . I watched it because I'm planning to do a KZbin demonstration myself.....if I can do one 1/2 as good as he did on this one, I'll consider it an unmitigated success!!

[@TheMotorcycleMD]

That means a lot man thank you!

[@keithturbin6768]

i owe you an adult drink mixture or 2 for all the knowledge you've shared, and time, money and sanity you've saved me

[@UhYeahWhateverDude]

The owner brought his bike to the shop because he messed up the installation of...grips? Oh boy...

[@deborahchesser7375]

@Buscheig Brauen and that’s because it’s lean usually.

[@michaelcunha852]

That was funny 😄

[@michaelcunha852]

Good one thanks for the laugh ! "Oh boy"

[@markowease9947]

Cody . Man you are awesome brother. You and your videos have helped me a lot. Just want to say thank you and I appreciate you making these videos.

[@TheMotorcycleMD]

Wow thank you so much for this comment!

[@Chupacabra0_0]

Hey what’s up man, slightly unrelated but are there any Fuel/Air mixture screws on a 77 CB550 carb?

[@lbyoung8420]

Andrew Rodriguez I have the exact same bike and would love to know the same !! I’m guessing yes.

[@kellyrjohnson7693]

Holy hell, this might just be the best thing I've ever stumbled onto on KZbin. I've got a 2000 VT750 ACE that the PO swapped pipes on and the idle is lumpy, it can stumble a bit when you first tip in and the decel backfiring is amazing - guess that's why Cobra calls it a shotgun exhaust. It's still pretty cold here in Chicago, but once I can comfortably sit in the driveway and tinker, this is going to have to be my first step. Now if I could just get you to stop by and double check my work (and maybe go over my NT700, too) I'd be in hog heaven.

[@CIarkNova]

Kelly R Johnson I wonder if the pilot jet is too small?

[@kellyrjohnson7693]

@@CIarkNova Probably so. I did end up drilling out the plugs and fiddling with the air mix - the bike rides just fine but still backfires on decel and doesn't want to rev without any load. I'll be yanking plugs and replacing them soon.

[@michaelmaring9925]

I was able to use your method to take out the welsh plugs. I made adjustments but, since my bike came with the exhaust baffles nocked out, how do I get a perfect adjustment of the air/fuel mixture? I have a 1996 Honda Shadow VT1100 ACE. Thank you for any help you may give.

[@jimsnellen6222]

Hey Cody, boy am I glad I found this video. I bet you saved me a bunch of money! I have an ‘06 Shadow Spirit and I just finished the reassembly and test drove the bike. Based on your procedure for removing the Welch plugs and adjusting the carb settings, I am very, very satisfied with the results. I bought the bike with V&H Straightshots but had a problem with backfire during deceleration. I didn’t know if the bike had been jetted and the only way to tell was to inspect the jets. I needn’t tell you what that entails but I really didn’t want to go there. After finding this video, I decided to duplicate what you demonstrated and it worked perfectly. Backfire is gone and the bike runs great. It even increased the idle just like the video and I was able to dial it back down. Thanks for a job WELL DONE!!!

[@TheMotorcycleMD]

Don’t you just love it when a solid plan works out?! So glad you got the result you wanted man. Enjoy it brother!

[@Ladosligese]

i was taught drill a 2 mill hole .. take a wood screw cut the tip of it .. drill it in just till it catches then pull on it

[@lawrenceblanco4895]

Likin your vids man! I can tell you really want to help a brother out! Your presentation speaks to me. Keep it up and keep um comin! I'm sub'ed

[@graemewilliams1308]

Exhaust poping/banging is not backfiring. It is actually called after firing. Back firing occurs in the inlet manifold.

[@TheMotorcycleMD]

After firing , is also called after burn. Thanks for the info 👌

[@danr7896]

@@TheMotorcycleMD You showed me how to fix my vlx600 that a ?'mechanic' ? destroyed a year ago. Refused to go back to him. He gave me bike back after 8 months, with a zip tie on my chock. He even showed me how to slide it up and down. Unreal. Thanks Cody, I have a bike again. I also replaced my brake fluid and bled, with needle nose pliers, like you showed in your video. Better than ever, great tip. I'll be replacing coolant next, thanks to you. Hope all is well with you.

[@matthewmonaghan1064]

I worked at a shop and my boss had a neat trick for pulling caps. He would drill a pilot hole like you did in the center. He then would take a wood screw that he ground just a little of the sharp tip off. He would thread into pilot hole in cap. Take a small slide hammer with a claw foot and pop it out in one slide. Anyways, thought you might like the info. Something to try out maybe. Great video, on point. Thank you.

[@KenpachiZarakiX]

I did this on a yamaha xv250 and worked perfect. Drilled enough of the hole to allow a wood screw to grab, then with a set of pliers I wiggled it out. Took all of 5 mins to do!

[@jbhobbyist9372]

Just wanted you to know, I did take your advise seriously the other day about having screws turned out to far. So today... I took both Pilot screws and turn them both in till I could feel them seat. Did that two times ever so lightly. Then backed each screw out 3 1/2 turns. With cold start I pulled choke out and bike started right up running nice and smooth at fast idle. Pushed choke all the way back in. Motor idled back down running smoothly. Then turned idle screw down, went for a short ride decelerating in first gear and guest what? No more back fire!! Yea I feel so blessed right now. Thank you soooooo much!

[@TheMotorcycleMD]

+JBHobbyist That’s what I’m talking about man!!! Nice job 🤙

[@larryclarke7793]

Im a master HVAC mechanic and I can tell you, This Dude is a really good mechanic! Take note.

[@joshhead9368]

Im not trying to be rude im actually curious what is an HVAC mechanic.

[@larryclarke7793]

Josh Head Heating Ventilation Air Conditioning Refrigeration

[@joshhead9368]

@@larryclarke7793 oh ok cool. thanks

[@keeganlangford5580]

cool, tell me more about how gasoline engines are similar to air conditioning again?

[@walterswartz3406]

@@keeganlangford5580 Well, sarcastically, I'd say "mechanical" ! ! ! !

[@drgrunn174]

Thank you man, it was extremely simple and informative!

[@chrischalk4864]

Hi Cody, great video and the explanations you gave near the end were very clear and will be very helpful in trying to tune the GSF400 I'm resurrecting!! If possible, it'd be great to see a video of this procedure on an inline 4 to hear the sounds diference between a 4 and a v-twin. A tip, I do film lighting for a living, wear long sleeves when you arms are so close to your light source. The reflection from you bare arms is bouncing back and messing with you camera's focus so the area you're working on isn't as clear as it could be. :):)

[@TheMotorcycleMD]

+Chris Chalk This is actually a fantastic tip! I did not know this!! Thank you for your feed back!

[@quantumnova8616]

Hey, i havent been a sub for long but after your carb sync video, i felt you give really good information. So, to the point....my zzr600 (1990) is running rich and i cant figure out how to fix it. The bike runs really well, hates the cold but will still leave everything off the line. My question is what do i need to play with to stop it smelling like a fuel station while cruising/idling? Can you help?

[@smurik1]

I agree, this is the best video about adjusting your carb. Thanks bro

[@TheMotorcycleMD]

+Anatolie Murug Thank you!!

[@harrydhillon_re]

An additional tip I would give is at 4:02 to make sure to turn your fuel line to OFF before you remove the fuel line, otherwise you will have gas spilling out of your tank.

[@dakotahassler649]

Hey Cody, I have a nighthawk 750, when it comes to the welch plugs would i need to drill out one on all 4 carbs? And if so what would be the best way to do this? Thanks man great videos!

[@oldasdihrt5993]

That's all well and good but what do you do with a fuel injected Harley other than buy a tuner that helps a 'little bit' ?

[@TheMotorcycleMD]

Not too many options there bud. Carbureted and PGMFI are different animals

[@curtmiller1984]

Man this is honestly one of the best videos I have seen on KZbin to date. I was having problems with my VT750, watched this, and within 25 minutes the problem was solved… so simply.. thank you!

[@TheMotorcycleMD]

👌🏻👌🏻👌🏻

[@Dilsnic79]

now you solved my problem for my bike! Absolute must watch ladies and gentlemen!

[@theroadlesstraveled7726]

If you dont know how to do carbs this vid is great

[@TheMotorcycleMD]

Thanks man!

[@stevemoriarity860]

Drill the plug once, then screw a sheet metal screw in until it bites, pull out with a pliers.

[@TheMotorcycleMD]

+steve moriarity That technique works very well!!

[@kaboblewis1333]

Exactly, Drill 1 hole, use sheet metal screw to remove - That's the way the Honda service manual says to do it!

[@abelbabel8484]

@@kaboblewis1333 Suzuki says to do it the same way (old GSXR 600). They also say to use a "3.2mm-inch" drill bit.

[@deanfranklin9239]

i got a little rig like a little dent puller works good

[@Kro_man_tx]

This is what I was thinking. Use a screw. But it works either way.

[@Xworks22]

I just want to thank you for your video it's the reason my Yamaha r1 is now fixed. the previous owner for some reason had all the fuel mixture screws closed all the way in I didn't noticed and thought the carb was clogged I took the carb off multiple times to clean and couldn't figure out why it was running so lean the bike popped on deceleration and ran like poop after your video it now runs like a beast and no popping

[@TheMotorcycleMD]

Yamir929 This is music to my ears! Great job for figuring it out brother. Glad this video was able to point you in the right direction! Be careful out there!

[@bullockwagon5994]

XworksTV Dude my 2000 R1 is running like poo. I'm now convinced this is my dilemma, based on your comment. I hope this solves the issue.

[@Xworks22]

Bullock Wagon good luck it's an easy fix if it is just a turn of the screws in each carburetor

[@bullockwagon5994]

XworksTV I can't seem to locate the proper screws. Any chance you can send me a PM with a picture of the proper screws. The frame is all in my way haha.

[@Xworks22]

Bullock Wagon there is one per carburetor it's on the bottom of each carburetor by the float bowl it's a copper Flathead screw

[@likeitornotbut5900]

That last minute of advice you gave is exactly what I needed to hear, your an excellent teacher brother.

[@karlh4313]

Do you know anyone around Flint Michigan that works on Yamahas??

[@karlh4313]

Please I'm having issues with backfire on my 95 Yamaha Virago 535S I have to turn my pilot screws out a 1/4 turn to get the colortune to show a good Bunsen blue color if I put it all the way in it stumbles. Then if I turn it out to 2&1/2 it stumbles worse and shows a orange color in the colortune which it shouldn't. I don't know if my fuel level is off bad or what. Please help..

[@olrenison]

Hi Cody. have you ever made any videos on switching from airboxes to pod filters and the pros and cons and modifications needed to do so? Be really cool to hear your views if you ever get a chance. Great videos!

[@TheMotorcycleMD]

+olrenison Great question! I'm actually working on one now! Be sure to subscribe and turn your alert on so you get a notification when the video comes out!👍

[@olrenison]

That's great! I'll look forward to your words on it. I'm not so sure it's a great idea for us UK riders where we see a lot of rain but it looks so good.

[@robertamerson3141]

Good stuff man! Thank you kindly for sharing your knowledge with us, and teaching an old dog a new trick.

[@ClassicRider]

So far you have helped out a lot. I have the 1979 Limited Edition CB750K that you did the carb sync on. I had removed the baffles to discover incredible power waiting. After restoring her in Spring 2021, I had a Vintage Motorcycle co, tune so to get it past inspection. Things were okay for about a week although some deceleration backfire.. Yesterday after highspeed driving on the highway for about 5 min's, the lean symptoms showed up. I had enriched the mixtures since before. Still some deceleration backfire - so further enriched. and deceleration backfire became minimized. But after exiting the highway yesterday, when winding down to a stop, engine shut off, and idle simply would not sustain, and would need to rev her. It seemed like a manifold leak, and also the Carb No 1 was having loud backfires during idle suddenly. After limping home, with engine case @ 240 F Temp, and after cooing down, drained float boil one and injected carb cleaner directly into the Boil via its drain hole. This improved things somewhat. The Manifold Boots had been replaced, and new hose clamps tight for a screw driver but not firm for a ratchet. Just got back after some further testing, Im using STP Ultra to clean the fuel/ carb systems. Just a little back fire to watch on Cylinder 1 - Thanks again for your help and for reading this -

[@johnmackeymusic]

Just bought a vt750 a month ago. I'm having this exact deceleration backfire you describe. Thank you so much for this in-depth video! Now I have confidence in digging into this myself.

[@Adventurecruiser805]

Bro, I just did this on my bike and si far so good. It already idles muuuch better!

[@scottmiller8801]

Good video! I own 25 bikes and have done this with every one with good results. I truly believe it is the ethenol in the fuel now that is causing the lean idle mixture condition.

[@TheMotorcycleMD]

Scott Miller Nail on the head Scott! So easy and so practical!

[@bnnken]

You don't sound like a dork, it's a beautiful language, the linguistic equivalent to "a picture says a thousand words", sincerely, thank you for this video.

[@TheMotorcycleMD]

+bnnken Thank you! Glad you enjoyed the video!

[@bnnken]

Same as other posters, I also could NOT get my gs500 twin running right, couldn't find help with gs500 specifically, but within 5 minutes of watching this I had my idle perfect and no longer hanging and popping.

[@rayschutte6651]

I dont care what you sound like. A smart guy will appreciate the help.

[@mikegish5759]

I've got a 2000 Honda Shadow Sabre 1100cc, and thanks to this video, I was able to enrich its lean mixture and increase the idle speed. It's running much smoother. Much appreciated MD! My next step will be to install a K&N high-flow air filter.

[@patdennis3751]

Usually, when a multi carbed engine is slow to return to idle is due to the carbs being out of sync

[@TheMotorcycleMD]

True! I wouldn’t use the term “usually” but I would agree with you that sync does/can/will play a factor to this specific response. Thanks for the comment!

[@patdennis3751]

@@TheMotorcycleMD OK let me rephrase.. "More often than not". It can be mixture related, but again, more often than not that would entail one carb being out of sync "mixture wise". Slow return to idle is one cyl fighting to stay up as the other is dragging it back down. If both pipes show the same with an exhaust gas analyzer at idle, then it is a case of out of sync slides or butterflies.

[@TheMotorcycleMD]

Pat Dennis I couldn’t agree more with you Pat. Great description of the symptom and cause! I appreciate you brother 🤙🏻🤙🏻

[@archygrey9093]

From my experience 80% of the time its another bloody vacuum leak

[@TheBotwoodboy]

I just popped out my baffles out of a set stock harley slip ons on my honda vtx1300, and I'm back firing, too, on deceleration. I'm glad I found this video. Thanks.

[@NYClubMaster]

I couldn't really see $HIT, your hands were constantly in the way. Nevertheless, thanks for the informative video 😉

[@AnDre-ox6xl]

Thanks for this great video and all the explanations. I have a 2006 Honda Shadow Spirit - have some acceleration backfire, and at idle as well just like in this video. Now I at least know where to start next weekend!

[@TheMotorcycleMD]

+Andre Kadibelban Hope it cures the issue!

[@skeptic3332]

The idle speed needs to be 1200 RPM +-100 or else you will starve the top end for oil at idle per Honda manual. The ACE is 1000 RPM +-100. The difference is single vs dual pin crank.

[@ViewlessSquid]

I'm going to give this a try on my v65. I bought this bike from my uncle which came installed with a kerker 4 to 1 exhaust, K&N air filter, and tuned carbs. the bike was sitting for 10 years before i brought it back to life. the last two days that i have been riding it though, when i accelerate and just cruise with very little throttle, the bike is popping a lot. i called my uncle and he told me to check the AFR screws and to turn them in and dial it back out to 1.75 turns. does that sound right? i did new plugs, cleaned all the jets and filters in the carbs. it's driving me crazy and i don't think its good for the motor to be constantly doing that. Any help would be awesome! thanks for your knowledge!

[@Jodyrides]

Those individual air cleaners cost this engine of about 6% of the power..The standard airbox is designed with an effect that gives free horsepower called velocity stack effect. A velocity stack effect is, the use of a funnel shaped tube. It goes from large to small. As the air is being ingested into the engine, and it passes through a velocity stack. The air actually picks up speed and has a mild supercharger effect.It forces more air into the combustion chamber then would be pulled in without the velocity stacks.If you want to use these gause/oil air filters, Buy a stock air filter replacement and put it into the standard airbox. Do not put these individual air cleaners on unless you don’t mind losing about 6% of your horsepower..

[@big_air_jer9768]

Do all carbs have Welch plugs? I have 2005 vlx600 single carb. I have never heard of this adjustment before.

[@idkman5736]

dude, holy shit... Where have your videos been my whole life? How did I just now find your channel? You need to be known, Subscribed!

[@TheMotorcycleMD]

+idkman 🤙🤙

[@kylecoggins17]

I got a 83 Honda shadow vt500 I’m bobbing out. I wanna chop the exhaust. Reading I’d have to rejet the carb in order to do anything with the exhaust. Would this be a better option for what I’m looking to do. I don’t really no a whole lot about carbs

[@richardlewis1363]

What up Cody, Watched all your videos regarding carburation and jetting. I've been bought up on 2 strokes 😁. I'd like to say thankyou dude for guiding me to set up my Honda cbr1000f , she's now running like a Rolex watch now😉💪. Best regards dude , Rich in the UK 🏴󠁧󠁢󠁥󠁮󠁧󠁿🍺👍

[@heyinway]

Everyone....first step...the "philips head screws" aren't philips head. They require "JIS" screwdrivers. JIS is Japan Industrial Standard. A traditional philips head screwdriver will strip a JIS screw head.

[@ClassicRider]

Hi - a request please: on my 1979 Limited Edition, which you know from synching carbs, I have a luggage carrier. I would like to add a backrest, but these days no motorcycle Honda shop would be there to visit the parts department to select and purchase the correct backrest. Im interested in having one so my wife is more secured in back of me, and can feel more comfortable. Question: I noticed one on the bike you are working on. At Amazon the closest I can come to one is for a Harley. Im not sure if the mount points share the same width was what I have on my luggage carrier where it would mount from. The Harley version was $75.00. Do you happen to have a spare backrest laying around that I could retrofit onto my 750. If reasonable, would be pleased to purchase it, and pay for shipping. Meantime I really enjoy your channel. I just would like to see you put my bike model on its center stand - thanks - PS - Also if you have spare OEM exhaust for 750 79-81 please advise - thanks

[@Mista_G]

What if I want backfire under deceleration but still want that smooth idle and quick throttle? I like the backfire, don't really want to get rid of it.

[@TheMotorcycleMD]

Obox Never heard this one before.... you would need to run it lean or plug up any air cut valves that bike has. This will more than likely change your throttle response and smooth idle..

[@Gyumble]

i love the sound heh

[@greganderson4401]

I though this was a video on how to get more backfire sound!! hahaha

[@hithereson]

Why would you want you're bike to sound as if it is improperly tuned?

[@MicJaguar]

The answer to that my friend is attention. lol. Or to make everyone hit the floor when coasting through the bad side of town. :D

[@numanEE]

great explanation! I'm currently trying to learn carburetor basic. I'm trying to get my yamaha dragstar to work with pod filters without changing nozzles :) (and it also has adjustment screws under the cover).

[@marcusrutsche6276]

Hey Cody, I need your help please. My bike does not come back into idle... The speed depends on 2000, sometimes in 1500 RPM... Adjusting the mixture screw in every direction makes no difference. There is no leak. It ist a 1992 gsxr 1000. Do you have any advice? Thx and best regards from Germany

[@MrPeterc59]

Great video..have the same sounding popping in carb and backfire on newly aquired 1985 sr500.Found the fuel mixture screw (near engine ) so will start at 2 turns out and go from there..

[@maakamakana7007]

I have spent six weeks everyday doing this to my bike, and it runs different everyday..de accelleration backfire..I am now beginning to suspect the little rubber O rings and small washer inside the pilot screw housing...I am at a dead end really

[@motsetao]

Have a 1989 VT600 w/16000m on it. Have deceleration backfire. Local Honda wants to rebuild carbs and has made no mention of simply adjusting them.. In watching this video it appears that you're dealing with a single carb (?) and my VT600 has duals. They want $800 to rebuild and tune. Comments?

[@jamfactory4119]

thanks bro. I've spent 7000 miles shooting pow pow at the neighbor's cause (A) I'm too cheap to get the carbs worked if it's running. (B) My crappy VT750CD had no visible carburetor adjustment. I can can hear the coughing and sucking in the rear cylinder. I can get that plug outta my rear cylinder carb directly without removing any parts. Thank you for showing me those damn Welsh plugs.

[@bikerclivew]

Hi bud, I really enjoyed your video, well done! Would the jets be in the same location on a Yamaha xvs1100 Dragstar or a Vstar? I ask to see if I can access and adjust them like you did without having to remove the carburettors. Merry Christmas 🇬🇧

[@VndNvwYvvSvv]

It's not backfire. It can be deceleration popping or exhaust overrun, but backfire is when it (get this) fires backwards. That means out through the carbs. Know what you're talking about first. Then he says "back pressure" lmao. That's almost strictly a myth. Watch Engineering Explained go into detail about to.

[@Hillbillymafia]

I have a 1980 kz750. having an issue with one plug fouling. rest look lean any advice. would be greatly appreciated

[@TheMotorcycleMD]

Eugene Hicks Top three things I would check. - float height - mixture screw - cylinder compression

[@srenstagaard1042]

Hello Mr. Honda. I have a VT500c 1983 with some afterfire and it become weak on the throttle, when engine is warm. After looking at your vidoes, i now understand much more about how it works. To ajust the mixture correkt, i am plannig to order a "glass" spark plug, to watch the color of the explosion. It is called Colortune. What do you think about this. Can you tell me, where you order spares.in Denmark, it is almost impossible to get new spares. Thank you Søren Stagaard Denmark

[@garylal2088]

Hi Cody, Good evening, A'm having a problem that's tricking me out man on a VZ800 Marauda a 1997 carburetor model: Here's the situation fuel tank had sludge/sediment, clean & coated tank, clean cabs entirely 3 times, bike was working on rear cylinder before & after service, troubleshoot electrical, fire reaching plugs, front cylinder still not firing, remove plug on ft/bank again check for spark, plug firing but orange spark,recheck cabs, clean & check float needles, fuel reaching cabs, fire it up again, it starts on front cylinder, rear stops takes a while & gets warm but not very hot, give it a little trottle it's breaking up really bad, & I have to keep the choke out @ all times even though all jets are thoroughly cleaned. Can you shed some light on this problem please.....Thanks in advance!!!

[@mgarc1960]

This is great info, thanks for helping us keep our rides sounding great and on the road. I have a 05 750cc Shadow, why does it take so long to fill the gas tank? I put in about 1 1/2 gallons then I have to wait until the gas slowly fills, it takes about 3 of 4 minutes to fill my tank. What should I check?

[@Sole-Survivor]

In the event that I remain unable to purchase a "pilot screw wrench" compatible to my bike ('07 Honda Shadow 750) are there any substitute tools that can be used? My bike doesn't have a welch plug but the air/fuel mixture screw is not accessible because I cannot find a pilot screw wrench that would allow access to the mixture screw. Hopefully I can use a different tool that would minimize the risk of unintended damage.

[@davidbeaver39]

WELL AS USUAL ANOTHER PERFECTLY EXPLAINED VIDEO FROM CODY THE GENIUS OF THE POWERSPORTS INDUSTRY. THOSE WELCH PLUGS SEEM LIKE THEY WOULD BE TOUGH TO REMOVE. WELL TOUGH FOR THE NORMAL HUMAN. HAHAHA, BUT WHENEVER I WATCH A CODY VIDEO THINGS ALWAYS SEEM TO GO SMOOTHLY. I KNOW YOU ARE AS GOOD AS YOU ARE SIMPLY BY KNOWING YOUR CRAFT. I'm SURE YOU DIDN'T BECOME THE MOTORCYCLE GURU YOU ARE OVERNIGHT. JUST A. PERFECT VIDEO FOR THOSE NEEDING TO KNOW HOW TO. ADJUST THE AIR/FUEL MIXTURE ON THEIR BIKE. EVERY QUESTION A PERSON MIGHT HAVE IS COMPLETELY ANSWERED IN THIS VIDEO. AWESOME JOB CODY KEEP UP THE GREAT VIDEOS BECAUSE WE ARE LOVING THEM. THANKS BUDDY!!!

[@gittyupalice96]

lol so many little things now make sense... Came here to adjust a Kawasaki dirt bike carb because I had that lingering high idle before it would get back down to idle plus the little pops, (LEAN) but I just happen to also have a Shadow Spirit 750, wich does little carb backfires when its cold... but once the engines warm its completely fine.. SO I might not touch the shadow.. Its a little confusing.. SOmetimes its lean sometimes Its dumping black smoke like a diesel truck, sometimes its fine.... maybe I will.. Nah **** it I'll leave it and go do dirt bike things today. (this is why everything takes so long for me) lol

[@jaywaggener7448]

@TheMotorcycleMD I have a 1992 Suzuki Katana 600 that idles super high. The Tac isn't working or else I would say what it is at. I've also only been able to start it with starting fluid. Would it be an air leak? or does it have something to do with the choke? Also, what is an easy fix for the Tac?

[@christianprip7731]

I have now spent so many hours and money on trying to fix this issue on my Kawasaki z 440 LTD. I have tried factory settings (2.75). I have tried following your guide. I have tried everything !! :( My bike used to run okay. Then I installed pods. Tried 3 verions.. couldn't get it right. Finally I bought the original air box and installed it. (Air vent to the motor is still blocked) but I still can't get it to work. Idle works. If I turn the idle screw enough, I can even idle fine with the pilot jet all the way in. However.. No matter what setting it use. I get the scenario you mentioned at the end. The throttle will have delay and take several seconds to go back to idle when I release. I could really use some good advice!

[@Big_John_C]

Replace the rubber intakes between the carbs and engine, small cracks cause a very lean condition.

[@LordOfThunderUK]

A very nice video, shame you are in the USA because I would have come to you for my bike that is running like crap, Honda NT700V 2008. It wont go over 4k revs and it is doing just above 58 MPH, even lorries are overtaking me.

[@MrPotatochips4]

Just bought a used SV650 with this problem amoung others, just getting back into bikes after many years. You don't need to know how many. OK, Too many. The last one was a Norton 850.

[@InvalidUser18]

Is there a way to do the opposite for sleeper builds? Idk, it'd be cool to further the idea that its a POS with the fact that it doesn't make a bunch of noise. Also, would there be a way to reduce exhaust restriction while still keeping it quiet and not straight pipe it for maximum airflow?

[@carltondyer5143]

I have a 1996 Honda shadow vt1100c spirit. I only gave 600 for it but it had minor damage and a few engine problems. The exhaust was crushed so I chopped it off to about a foot and a foot and a half. The engine was only running on the front cylinder when I bought it so I went through and replaced the stater and the voltage rectifier, new battery, plugs, filters, and plug wires. I'm running the bike on 93 octane. And now I can't seem to get it to run on point. Any advice will be greatly appreciated.

[@Tacbi0325]

Hey bro my 98 intruder just to day started backfire while was riding... but only like 10 seconds, I lost power I have to revv to keep goin.. then stop .,? But I just fire up and go back to normal for like 20 more minutes till get home ... and no more back fire.. why u think tha just did only one time??

[@dudio37]

Hey my friend. It looked like you were doing half turns at the end. It may have been an illusion. Curious. Is one turn from 12 o'clock to 12 o'clock or 12 to 6.?

[@Flaffi78]

I have a xs400 which runs ok after carb cleaning but i want to adjust the mixture screw. The problem is that on of them was stuck and drilled or as it seems like hammered out and the hole is now bigger in one carb. Therefore the screws need to be adjusted completly diffrently. Now the question, is it bad if I unplug one plug and only adjust the one zylinder at a time? Thank you very much.

[@michaeldebusk5577]

Whats up Cody, just wanted to thank you. These videos have enabled me to bring my father's bike back to life, and I'm looking forward to getting it fine tuned. Keep up the good work bro.

[@MichaelRoachWV]

Just finished an intake, jet screw, and exhaust on a Coleman Mini Bike lol. Ran amazing at first, then started having very little power and deceleration backfire. The setups a little different with my carb, but your vocal demonstrations told me exactly how to tune it in. I've got an adjustable idle screw and mix screw (196cc Honda Clone 6.5), I did notice the throttle has to be cranked before the engine does anything

[@vodkalust1]

i just got a kawasaki 188. everythng seems to be working fine except when i start up the bike and if i don't give gas to arounf 1000-2000 rpm it will shut off. what is the problem? could it be a vuccum leak? please answer would be very helpful

[@tonytonytony8302]

I have a cb 750 bobber with a 1976 sohc engine dyna coils & pd carbs with k&n pod filters. It starts and idle very good. going down the road 1st 2nd 3rd 4th giving it a bit it goes very well. then when you want to stick at 70 mph starts running a bit shitty. I think it’s running lean due to the pod filters do you know what jet size would sort this issue. Look forward to hearing from you many thanks tony

[@patw9175]

I always wondered what those blank brass dealies were. I'm definetely running lean as the fucking airbox connectors won't stay attached to the carb throats. I hit a bump all of a sudden my carbs are just sucking in free air, no filter or anything. That's a problem by itself but in the meantime I'm picking up some pod filters and will have to tune out the lean condition. I won't lie, I like the backfiring on decel but I don't like that I have to bump start my bike if it's below 50 degrees outside. Luckily the carbs were coming out anyway. Thanks for these videos!

[@jasonbrown1811]

Do you have a video on doing this on a cb750. I just got a 1981 cb750c, I clean out all the jets and put on pod filters, now it's running on the lean side I have to run the chock just a little to make it run semi smooth while riding it otherwise it has no power. Any if would help. Thanks, great videos

[@robmoyer1977]

Brother I love your videos!!! Even if I've done something before I still see if you have a video on it cause almost every one I've watched I learned something new. You have no idea how much help you have been for me thank you soooooo much. And this video spot on popped out the plugs did a cpl adjustments and BAM...my idol is smoothed out and no more backfiring, throttle response is better and it drops right back down to smooth even idol. My Bike and I thank you tons!!!! Keep up the videos you are a life saver for guys like me.

[@cheynebest7028]

You sound like an angle!... now to fix this backfire on decel Ive had for years on my vtr 1000. Only happens if Im heavy on the throttle and get slapped with a red light. A little embarrassing on a sport bike.

[@audiofella5066]

I recently did this adjustment on my yamaha virago, first time i turned too far counterclockwise, the bike idled ok but serious acceleration power loss and the bike felt like it had no power, now i re-adjusted them and turned them back in clockwise a couple times and now the bike runs good and has good power but has quite a lot of deceleration popping, it scares kids and women as i ride by LOL. Anyways i will leave it turned where it is now because it has more power, but does anyone have any ideas on what i should do to get rid of the popping / backfiring???

[@ecrusch]

I watched this when you first put it out and got my bike running 100 times better. And now, I'll occasionally re-watch this vid to remind myself how to make these adjustments if I need to. Thanks Cody. U da man!

[@vmax4steve524]

Try doing this on a suzuki VS1400, absolute nightmare, one carb under the tank the other under the seat and joined by a sync cable.

[@victorcrowder9703]

I paid a solid 3 digits for my bike, because it would not run. $7 worth of plugs and i was riding, got to drop my first ever bikewave lol. looking forward to your videos as i turn my POS into a very nice first bike. thank you

[@utahlakewaterfowlassociati996]

Ok, so I have a 1997 Honda vf750 with four carbs, decel poping out of the exhaust, runs good when on the throttle, it hasn't been carb synced yet, also the throttle is kinda stiff, really hard on the wrist, is this a cable issue? Or a after market issue?

[@stevemiller7654]

Why not use a sheet metal screw and a slide hammer to pull the Welsh Plug rather that the progressive drill bit sizes? I have done many Keihin carbs with the screw method, no problems And, why not un-twist those throttle cables while you had the cable bracket off of the carbs? Or is there a reason to leave the cables twisted together? ....RooDog....

[@dustykibby776]

I knock the baffles out of my exhaust I got a 1980 gs850 Suzuki and now it is blowing blue smoke out one side and backfiring my spark plugs are black but not wet can you give me any suggestions

[@alpurl]

When I pulled the plugs on my bike, I used a sheet metal screw. I ran it in the first hole, and grabbed the screw with a pair of pliers to work the plug out

[@tommyaleks100]

Hi, sorry I know it long ago. I have a Honda vf 750 S 1982. The problem is when I start it up. it smells gas from the exhaust, I have no leak. I trottle it up and let go of the handle. The engine goes down to the idle but after a short while it stops. What I can tell you about the bike is that it has not bean used for a long time, I have done nothing to it, I bought it that way. it has a nice trottle up, and a nice idle. Can you help? Thank you.

[@Chrischristopherson1313]

Where can be a problem if one cylinder doesn't respond to air/fuel mixture screw. It backfire on declereting and on idle. It only working fine above 2500 rpm.

[@caseytoumani2813]

I have a '94 vt1100. I am have with a minor after-fire. It sounds like a cough. Would this adjustment to the carb help

[@Sole-Survivor]

Please explain: If a bike, such as mine, has a pilot screw can the same adjustments you explained in the video be achieved from that one screw? That is, does a pilot screw serve to adjust both air and fuel mixtures? Please acknowledge as I have been unable to find anything in my manual indicating an air or fuel mixture screw.