Honda Navi Carburetor tuning/adjustment

[@pasdutout4690]

Rideordie. You don't have to count turns out on the idle speed screw at all. Just adjust it at 1700 rpm, by ear is enough if you have no tach. I'm a mechanic and don't care which position that screw is from the start, I just bring it back to a sensical rpm, and then adjust the AIR screw back/forth till the engine sounds 'happy' ...then back to the idle speed one to get around 1700 rpm. Mine is stock, I lost count of the original AIR screw setting (my 'd' tool slipped twice, grrrr). Thanks to Jesse here for telling us his' was 3/4 turns out, stock ! I used this as a starting point ( it sounded very unstable/rich) and (easily, just by ear) ended up at 1 3/8 turns out, with the motor now revving a bit too fast, which was instantly corrected with the idle speed screw. All this took about a minute, no tach, It now purrs like yours, I 'm not even sure about the exact rpm (I have a Yamaha hr/rpm meter here but I won't even use it on the Navi putput, If it sounds good and the plug looks like yours, I'm happy with it. Stock, please.

[@alanszymczak6173]

I purchased my Navi in January. Looking at the Carb the Honda dealer drilled the air/ fuel plug out. The bike was running rich. It saved me the trouble. Great Video!

[@rideordie6886]

Good to hear Alan. How is it running now? What you mileage on the Navi and how many miles are you get to a tank before and after air/fuel was adjusted?

[@alanszymczak6173]

Before I took the Navi home the Honda dealer adjusted the carb because of the rich running. The dealer didn't replace the plug in the air/fuel mixture. I live in NW Indiana the weather hasn't been good here. Owned the Navi for over 11 weeks now and haven't taken it out. It only has 2 miles. Hope to ride it soon. Love your informative videos!

[@dasshape00]

I'm on my 4th tank of gas. 1st 44miles to the reserve. 2nd 49 miles to the reserve. Drove 4 more miles on reserve and got scared and filled it. 3rd tank hot 55 miles to reserve. Now I'm at 500 to 900 above sea-level. Very hilly here in Midwest. Also I crank down for full speed as fast as it will build speed. Heavy throttle use. Also had Wife on back for half a tank on time. Also I'm 240.

[@rideordie6886]

Yeah Navi is crap for gas mileage lol It’s a full throttle bike for sure…

[@MikaelFresco]

why are you running it to reserve? you do know that’s for emergencies only right?

[@JeckDRippa]

My stock adjustment was 3/4 in on the Welch side and 2 3/4 was my idle. Now I have my af at 2 turns in and my idle the same and it's fine

[@rideordie6886]

I’m glade it’s running better for you! Still crappy weather here, seems like winter is sticking around all April

[@JeckDRippa]

@@rideordie6886 where I'm at there is always 15mph winds so I can't really tell if I'm going fast or being pushed back.

[@jacobprice5442]

What size D sockets for the air/fuel screw

[@jacobessex1252]

What size D tool did you use for the air fuel screw?😅

[@jasonenglish458]

I'm in Ca. Stock, running real rich, 30 miles and more than 1/2 tank. Boggs and stalls after 5-8 miles. Def prob with carb. I messed with idle screw but did not want to mess around with Welch. Taking back to dealer to inspect. Thanks for the info.

[@rideordie6886]

Can you give feed back once you go to the dealer and when you pick up, I’m interested in how there going to treat your situation and what there going to do. Thanks Jason

[@barryallen5507]

@@rideordie6886 its almost worth replacing the carb with an EFI system. These 'bikes' have a 109cc iirc engine, so they should be getting much better fuel economy than what you're getting. Truly awful. The grom engine makes more power and gets more mpg

[@jasonenglish458]

@@rideordie6886 Sure. So far, they said they are just going to clean the carb which does not really solve the problem from happening again. Pick up tomorrow, and will see. If that does not work, might look at changing the carb to an aftermarket.

[@jasonenglish458]

@@rideordie6886 Dealer mechanic test rode, stalled 3 miles in, same way I experienced. He cleaned carb, I tested idling and throttling and it kept stalling as well. He mentioned a possible pinch in the fuel tank line. I asked them to report it to Honda as warranty issue and work on it when they get approval. Left at dealer for another week or so. More to come....

[@rideordie6886]

@@jasonenglish458 thanks for getting back with the info jason. I highly doubt the fuel line, have them check the spark plug boot, something is cutting out obviously or it really rich. When it dies on you does it just stop running it does it dies when your giving it gas, does it die only at idle or when you riding?

[@jaisonjames4465]

Navi Spark plug details pls?how choose correct Spark plug?

[@erik770099]

NGK R / MR7C 9N

[@123edwardzpad]

Great how to video. Thank you. What kind of gas mileage are you averaging now? Are you cruising a lot or mostly wide open throttle?

[@ERamos585]

I have mine jetted and the air fuel screw exposed. I’m waiting on the tachometer to arrive and did these exact settings in the meantime and it now purrs like a kitten. I’m curious to see where the rpm idles at. This video was very helpful. Awesome job.

[@rideordie6886]

hi DYOS! Thank you for the update and I’m glade it helps. I would bet you will have to just silty adjust the idler screw but maybe it’s just right. Let me know what the rpm’s at before you adjust it when your tachometer shows up.

[@Symbiiote]

Can you help me dude? I have the yoshi and I have rejeted and added an intake. I cannot get this thing to run right and I’m losing my mind.

[@gooch1078]

This makes me wonder if I might want to cancel my order. I was expecting way better fuel mileage and you would think with them making these in India for a couple years they would have the carb straitened out.

[@anthonytienprasid2190]

Great video! I have the Mnnthbx intake and an exhaust from eBay. Put on the 38 pilot and 90 main jets. I feel like it is running rich. I played around with the gold screw. I will have to try to dial in the other screw that you mentioned. I don’t have a tach but at idle I feel it is too high. Took it out and I felt like I lost a lot on the low end. Would you suggest tuning it or putting the 35 pilot back in. Thanks!

[@rideordie6886]

Keep everything you have installed and go by my adjustments that I stated in the video and it should get you pretty close

[@sackofclams953]

Hey bro, would you happen to remember if the stock exhaust had an O2 sensor bung?

[@rideordie6886]

no bung hole on stock Navi exhaust…

[@sackofclams953]

@@rideordie6886 thanks, man. I guess I’ll have to tune with a tachometer and hope that’s good enough

[@jeffmartin6174]

Another great video, thanks. Installing the 38 and 88 (stock exhaust for now) jets this weekend and looking forward to dialing in the AF screw.

[@rideordie6886]

Jeff! Glade to hear. How many miles on your Navi now?

[@jeffmartin6174]

@RideorDie lol.....11 kms....we just lost our snow but got another deep freeze. Hopefully this weekend.

[@jeffmartin6174]

Jets installed. Went with 38 and 90. Wow, what an immediate difference. I went by your idle screw and AF screw settings and seems to be pretty good. When I have time this weekend will go through the proper tuning procedure using the tach.

[@rideordie6886]

@@jeffmartin6174 hey Jeff! I’m glade it worked I’m sure you will need to tweak the idler screw just a bit but it’s a good start.

[@JeckDRippa]

@@jeffmartin6174 how do you properly rune it? I got a tach on my navi and Welch plug is off.

[@USERNAME1-x5u]

I would figure at an engine at operating temp that the colder, more dense air, would give it better air ratio.

[@ryansaunders8099]

Do you explain that thing you "drilled out" in another video? I have no idea what you're talking about or what the purpose of that is. (I'm a beginner motorcycle rider)

[@rideordie6886]

Sure did. Look under my videos and it’s how to remove the Welch plug…

[@anat3000]

Hi, I own a Navi for a year and already did 2400 miles on it. It is my go to work ride, and I ride 20 min every day , 5 days a week. Two weeks ago I started to see that I can’t run the Navi without open choke. At the local shop the guy told me that it seams that he need to clean the carburetor . After seeing your video I’m not so sure with what he said. I tried to idle it but it didn’t work. Any ideas ? Thank you

[@rideordie6886]

have you opened up your Welch plug and adjusted you idler mixture screw by chance?

[@anat3000]

No I didn’t and I’m sorry to say but I don’t know what it is .

[@rideordie6886]

@@anat3000 ok if your not mechanically inclined this might be a bit much and you will probably need help with your Navi. Or watch the video and determine if this or isn’t something that you have the means to do on your own. Go to my channel and look for Welch plug removal. Thanks for watching

[@anat3000]

Thank you so much , I’ll watch it

[@1234masterify]

Que tal amigo te saludo desde Guatemala tenia un problema con la misma gracias a tu video solucionado completo podrías subir como calibrar las válvulas porfavor para poder aprender disculpa

[@dasshape00]

Thanks 4 this video. I got the vance and hines exhaust and jet kit. I'm waiting on the air box and intake kit. Do you think a can go ahead and rejet and put carb on now, with the original air box and next week when the other stuff gets in put it on? Or should I wait and do it all at once? Damn I want to do it now. Lol

[@rideordie6886]

Yeah I get wanting to do it all now but go ahead and put your exhaust on, no problem there! Wait to rejet tell you have your intake in less your not going to be riding it tell your intake come in, good chance that you will be running richer then it already is (if you havnt already drilled out your Welch plug) the factory settings if you rejet and ride with out intake… but definitely get access to you air/fuel mixture screw regardless just so you can tune it… hope that helps that’s for watching!

[@markpinther9296]

My navi… same thing regarding first tank of fuel. Just got mine.

[@Wynn96]

On this particular carb, does turning it in make it richer or leaner?

[@ramiretz]

turning in makes it lean, turn out makes it richer

[@fqqures1019]

after how many miles, was the spark plug this condition?

[@rideordie6886]

Zero

[@ice45k1]

Do these things have an emissions delete like the grom clones

[@Wynn96]

There's a little egr or air pump setup. The box is under the plastic between the seat and the gas tank. I removed most if mine but it doesn't run any different, maybe a touch less mileage.

[@beausbargarage6213]

How did you get that air fuel screw out it’s flat

[@rideordie6886]

Oh lol D shaped socket driver or pull it out and make cut/grind that would fit a flathead screw driver

[@therealrealshocker]

I was wondering the same thing

[@SinisterDeeds214]

Where did you buy the "run leader"?

[@rideordie6886]

I believe you can purchase thru Amazon or eBay for the Runleader

[@kzirb]

Took mine out yesterday and it wouldn’t idle without the choke on just a little. It also backfired a couple times, and revs were hanging. Power was down, top speed was down. It ran good in the cold? Do you think it would be improper carb tuning for warmer weather?

[@rideordie6886]

Sup Kyle. Yeah your running rich. Sales and service knows about the problem at moon. Either take it up there or save the time and hassle and pull that Welch plug and set it to my tune and it will run so much better…

[@kzirb]

@@rideordie6886 that’s what I figured but I’m pretty new to this. I have to adjust both the Welch and AFR right? Not just the air fuel?

[@rideordie6886]

@@kzirb Welch plug need to be drilled out to get to air fuel screw. Watch my Welch plug drill out and idle adjustment video should be enough info to figure it out… but ask if can’t figure it out

[@fritzsound]

Got 82 miles on my Navi and have added gas 3 times. It runs okay but mileage is poor. Top speed is 45 mph.

[@rideordie6886]

Hey fritz. Thank you for watching. Sounds like you need to get to that air/screw. Check out my other videos to drill out the Welch plug. Subscribe!

[@栄栄-e5i]

Thanks for the video! I was able to remove the cap, but I can not take out on the air fuel screw... How did you do that?

[@rideordie6886]

Drill it out… I have a video on that as well

[@thomastaylor2513]

What kinda gas you running. Should always run non ethanol that's why that spark plug is black

[@rideordie6886]

You can put 87 octane if your use the Navi often but if it sit for a period of time I would put in 91 non oxygenated… black soot is indication of a rich mixture and your air/fuel mixture screw need to be adjusted

[@techtinkerin]

Ethanol burns with no soot at all

[@69RIGGER]

First thanks for all your great information ! What all have you done to engine so far ? Jetting? Filters ? Exhaust ? Ect and what gains are you seeing all around? Thanks again, we all appreciate ya👍🏻

[@rideordie6886]

thanks for watching 69RIGGER. 38 pilot,90main, aftermarket air filter, custom made yosh muffler. I'm still braking it in so performance will get better as the motor get broken in more... but more acceleration for now anyways. I have other videos on the things I've done so you should look at those. also subscribe if you haven't already :)

[@SCMOTO]

Great video bud

[@dukepointer9128]

You mixed up the settings when you summarized!

[@dukepointer9128]

My bad, I think just some confusion during video

[@marcnissen578]

Mine runs smooth so if it ain’t broke don’t fix it

[@52fzlwurkz]

Without using reserve I got 54 miles my first tank

[@rideordie6886]

What are you getting now and what mileage on the to odometer?

[@52fzlwurkz]

@@rideordie6886 I'm at 192 miles now. I still haven't been using up all the reserve yet. But I'm getting 60-65 ish a tank before reserve. The more I break it it the better mpg I'm getting it seems.

[@QuasiMotard]

First! 😉👍 --QM

[@rideordie6886]

we are in the teens again tonight and next week doesn't look to great either. I would rather be ridding then working in the shop...

[@SCMOTO]

RideorDie hit me up on instagram instagram.com/scnavigang/?hl=en

[@rideordie6886]

Unfortunately I don’t do social media. Just a KZbin account. What’s up?

[@SCMOTO]

@@rideordie6886 started a shared FB group with other youtubers wanted to know if you wanted to join in

[@rideordie6886]

@@SCMOTO shit would love to but no Facebook account… one of those that don’t do social accounts.

[@SCMOTO]

@@rideordie6886 No problem man I get it. I only use social media sites from 1 desktop that contains nothing important, using a private VPN, TOR browser and a protonmail email account.