Will This $3 Part Fix My Backfiring Dirt Bike?

[@xSpecterx99999999]

Check the float level and the tab that pushes in the float needle. If it is janky, bent or has a dent or grooves in it, it will cause erratic float levels. That would explain it going lean at idle or going too rich. I recently had the same issue, took forever to figure out. It was a dent in the tab on the floats... caused the float to either turn off to late or sometimes too early.

[@bibeaubuilds2869]

I like the bouncing around it’s how I work as well. Keeps me interested and time to think of solutions.

[@Kash_Moto]

100% of carb problems are carb related 😊. Keep at it brother, you got this!

[@DaxtonAnderson]

+1 if you want a Jennies Yard Update day once a week! Chicken updates? 🐔🐔

[@foskere]

+1 if you want them hats already

[@wobblysauce]

What I am processing right now, you are not undoing the bolts. On reinstall did you look at the TDC and the Mark in the hole?

[@leehuntley189]

Jake........paracord down the spark plug hole will hold the crank still! And check ur TDC again see if that flywheel is the wrong size because that key should have sheared completely and it looked loose

[@michaelk2378]

Just a thought... try fill your fuel bottle completely and open the top cap so your fuel supply has enough pressure to overcome the surface tension of the small orifices it has to flow through, without the closed bottle creating a vacuum.

[@EulogyAdd]

For what it's worth I like the bouncing around.

[@12dstew]

There’s a tiny o-ring that seals around the idle mixture screw. I imagine it’s in the same condition as the one that was on the needle and seat valve. A new one made a difference on my 93 dr350s.

[@hoffmanshaven]

THIS!!😊

[@njb7209]

Sounds like you need an idiot light for the spark plug. It will help to diagnose spark cutout.❤

[@harrynutsackk]

Only an idiot calls an "Indicator Light", an "Idiot Light".

[@MichaelVaughn-p9f]

I can relate with the many projects due to parts weather and work,you keep m going accordingly

[@MichaelVaughn-p9f]

Outstanding job on the bike man,three kicks 💪

[@56Spookdog]

Old Timer is the perfect name for the IV it leaks like an old timers bladder.

[@freddy4ever312]

it’s a blusterus day! ❤

[@dlsinsc]

As for trying to unstick the Honda engine instead of beating it with a block of wood, make a thick steel plate with holes that match the head bolts. Then put a hole on the middle and if you have a welder weld a nut over the center hole to make a pressing tool. Bolt it over the piston using the head bolts. Then I usually heat the cylinder with a torch with a breaker bar on the flywheel nut and start tightening the press bolt. If it’s still not moving you can tap on the press bolt while turning it with pressure on the flywheel nut. You will probably need a pad to put between the press bolt and the top of the piston if you are trying to save the piston.

[@MainelyMoto207]

Theory: If there's two pickups, maybe the the cdi signals what pickup to use for when the engine increases RPMs for an advanced timing. If I had to guess, the timing is variable and this may explain why it randomly revs and backfires. Maybe something is messing with the timing.

[@braydenstringer6444]

That's what I was thinking. Pickups can act fine when cold, but once warmed up, they can crap out happened to me with my 86 ninja 1000

[@nonenone1249]

cdi going bad?

[@tommypryor8067]

I'm so glad y'all are back! I like the "bouncing". I have multiple projects at home. Finishing one at a time is not an option for the same reasons as you. I'll be retiring pretty soon, and maybe I'll get caught up 😎

[@ronsherfy6291]

Willy starting to rack up the Bills! 😂😂

[@michaelhathcock7941]

I am so cheering for you to hit that 350k mark

[@timothykrohss2430]

I think the ideal Christmas gift would be a full tool set up on wheels. No more back and forth searching for tools every tool in its place.

[@JackTabor-kt2qm]

You will get it champ we believe in you and Willy just started it off a Little Rocky 😂

[@MichaelVaughn-p9f]

Your getting way out there with the conversation

[@56Spookdog]

When I was a kid the bike shops and toy stores sold a headlight kit that worked off a generator that ran off the front wheel. It pressed against the wheel to make it spin.

[@Mr_C0R3Y]

Jake, although you are the most ADHD Tigger i have ever seen, we still really enjoy the content.

[@mannymarin1593]

It's the CDI. I have built many older Hondas. That is just like what happened to me.

[@Mrzizzy69]

definitely sounds better, maybe your leaky IV is letting occasional air into the line???

[@Mrzizzy69]

Also check for small cracks in the plug wires. I heard an episode of car talk once where there was a similar issue and there were small cracks in the wires that expanded when they warmed up causing intermittent issues ...food for thought??

[@skydiver6711]

Yes Camera girl. One project to completion as much as possible. I would love to see something get done and then move on.

[@vancemacd6315]

I am betting a whole dollar the CDI is bad!!!! It works good for the first 10 seconds then maby gets hot. If you had a spare swap it out. Might just be the problem.

[@philipbayhurst6146]

I had a similar experience on a wheeler I was working on. Ended up being a coil that was cracked at the plug wire. Intermittent shorting to the frame. Acted like a carburetor issue. Run the thing with the lights off and look for the electricity leaking somewhere when the motor cuts out.

[@Iseekoutthetruth]

Thee Ole Mac Guyver Muffler Trick. This Is Not A Carb Channel, This Is A Pontificating Channel.

[@tmwinkler]

So I like the jumping around between projects because that is exactly how it goes here on our homestead! Also, you are on to something regarding the "internal processor." I am surprised every time I look in a mirror... not what I was expecting somehow.

[@pingechelon9389]

Locke, Descartes, Hume... we experience reality in the "moment" and with a 200msec lag

[@beepseatsfindingfoodtreasu8756]

Those earlier CDI boxes were prone to exactly what you're experiencing. The newer ones are all around heavier made. Everything else sounds perfect.

[@MainelyMoto207]

Take a day off and have a happy thanksgiving!

[@WilliamWinsor]

I would have used fine lapping compound between the flywheel and crank to polish it to a really good fit before putting it together.

[@jason-ge5nr]

yeah our brains process reality fractionally slower than real time, and how a person processes reality does not affect reality.

[@quantumbuddhist]

Then explain the measurement problem

[@ScrapPileRepair]

Have you checked the part number on the flywheel to see if it's for a DR350? I bought a Kawasaki Prairie 360 ATV years ago and the previous owner messed up the original flywheel, put a Prairie 650 flywheel on it, ignition timing was off, It took me forever to figure that one out. He never told me about the flywheel when I bought it.

[@tundrajt]

My money’s on the CDI or the coil, more likely the former. I experienced an issue like this on a go-kart when I worked as a small engine tech. I spent so much time on the coil thinking that was the issue. I was checking air gaps, checking pickup surfaces - nothing worked. Finally went back in the wiring and found the CDI and checked the power as the kart ran. Turned out the CDI would get hot and short out and cut the signal to the coil, killing spark. Sounded and acted just like this…

[@paliacho9]

6:01 I'm with camera girl on not bouncing around - not just because I wished she had a single aunt - but because the bouncing is a bit discombobulated. Then again, I'd rather have a video while you wait for parts.

[@bobboby2613]

I hope you find the problem, my xr200r does the same thing, I ended throwing a new carb in it and gave up

[@hoffmanshaven]

There's a vacuum leak somewhere. Check all the little orings in the carb. Its going lean.

[@ridersanonymous4756]

Only thing that's changed is heat it seems when bike warms up it sets somthing off. Possibly cracked coil pack, cdi box, somthing electric that doesn't like when getting warm.

[@gmanshackshack6822]

Need to keep an engine from spinning while you tighten a nut? Old farmer hack... Pull the plug & feed some clean cotton or nylon rope into the cylinder. Run the piston up against it. Tighten the nut. Back the piston off & remove the rope. Voila!

[@WreckedRevival]

does it only do that when it's warm? If so I'd be looking into checking stator field coil & ignition coil resistances both when cold and hot if the resistance values go out of range when warm you've found the problem could also check pickup coil resistances cold/hot. The old school method without a multimeter is just check spark color cold/hot anything other than sharp blue sparks & there's a problem. Also check over the CDI and stator plug connectors, and coil terminals if the insulator is split & wires are corroded it'd be fine-ish cold and get worse when warm.

[@exCR-it3ex]

Time to get your electrician hat on

[@simpusedan]

The last time I got the exact same problem (running, and idling great when it was still cold, but then run terribly + some extra backfiring when the bike is already running for a couple minutes) i found out that it was actually the ignition coil that had already gone bad. maybe you should check that out and see if it was the same ignition coil problem just like mine :)

[@dublindave5795]

I don't remember if you checked the valve clearance on this bike. Is the slide on the carb sticking? make sure the Idle screw is actually holding it at idle speed.

[@Thingsthatgopew22]

Make sure that the IV don't make a vacuum in the bottle also.

[@bntrouble31]

Maybe the throttle cable may be holding the idle. As soon as you reved it, the cable maybe have slid down farther.

[@metaldog7128]

Has old drippy got an air vent on top of the cap or bottle?

[@CoachMcCabe]

My drz was so finicky… turned out to be float bowl after all manner of other tries. Had a definite starting sequence though (not electric start). Backfiring on deceleration… lean condition right? love JG!!

[@DillysADV]

Almost wonder if it is the cdi like mine but different issue. Runs good till a component warms up then it cuts out.. like an old cars icm

[@TheTojocat]

if the ignition timing was off that much by the previous owner do u think maybe they offset the valve timing to compensate? or its the wrong flywheel and thats why it was offset

[@sxshn8]

What if you put a tachometer strobe on it? To see if the timing goes off when the bike cuts off.

[@Kestrel-FG]

I agree with Camera Girl, stick with one project. Sounds like a carby issue.

[@UnRefinedHero]

Coil warms up, bike idles higher, coil gets hot and shorts out, bike stalls. That’s my guess. If not maybe the CDI.

[@rm25088]

get one of those light bulb spark testers and start it so you can tell if it loses spark.

[@mishimposble]

Sounds like something is wrong in the valve train

[@VashStarwind]

Does that mean the old key that you pulled out of her, was def an aftermarket key? Cause it wasnt crescent shaped was it? Maybe check some of those burned wires, maybe something is shorting cause of those wires. I was totally expecting it to run great after the timing was fixed ha. But I agree that it is probably electrical also, cause if it was mechanical, it seems like it wouldnt just randomly change like that. Hope you get it figured out man. One thing you could maybe do, is while shes runnin, jiggle around, and move some wires, and see if you can narrow down a spot where if you move something it changes idle. Or look at the shop manual and start checking measurement with the multi-meter

[@khwolter9038]

CDI box being flakey? Try putting s timing light on it and reference it to a mark on the flywheel.

[@MrCelticatheart]

most likely CDI or coil probably not both

[@TheGamersRace]

I'd say check your float needle adjustment and then put a little bit more gas in the IV bottle. To me it sounds fueling issue with the carb, not electronic.

[@Xtraweak]

Love the videos 😊

[@bustedcap]

I wonder if its that sticky throttle vibrating free after a bit? Will it hold a high rpm setting on the carb?

[@Stuckin330]

Pilot jet jake it’s got aftermarket exhaust on it the pilot jet and main jet need to be up one size . And now you got the timing key fixed your getting close . Also air leak in them carbs air common on them 350s I’m telling yah get a good carb rebuild kit and jet the carb up one sized or 2 on the main jet and the pilot jet one size that will make it back fire is lean condition . You have a tiny air leak in that carb

[@UncannySense]

Is it possible that the IV fuelling could be forming a vacuum lock stopping the flow and the engine is simply running out of gas...

[@exCR-it3ex]

Time for a leak down test

[@BADHIGEEN]

Ok then planning for the future or setting an alarm is forethought. 😁

[@nicholasagnew2792]

Idk, if the idle jet is too small that can cause erratic running

[@markymark5281]

Hmmm....microdosing?

[@patarmstrong3582]

They seem like fun guys.

[@VDUBguy]

Maybe try an air cleaner for some air flow regulation.

[@brianstarr]

Spark plug or coil wire connection to the boot?

[@vanvanoy]

My flywheel trench was worn out and it would slip even with a new key

[@jmudd5449]

Try when it's running take your heat gun and heat up the coil and see if it fails when warm

[@ronniecurnutt4309]

Replace carb to see if issue remains

[@smoothwake]

Wasn’t this the bike that had caught on fire? If so, electrical stuff doesn’t like fire very much. Admittedly bouncing around makes the small details hard to remember, but it’s how the real world works and I like the everyday posts. I suppose it’s time to start bouncing on my own projects.

[@jonathanmiller6258]

just replace carburetor assembly. Have had similar results for similar issues. Saved a ton of time every time. could be air leak somewhere on low speed needs o ring, or anything carburetor to engine.

[@geoffreyjones2000]

Spray 9 as a prewash will get oil out of your laundry

[@robertstephenson7864]

I wish weed was legal in my state, so I could better enjoy these philosophical pov's.

[@SNARFOLA]

break in plug wire?

[@blaineobrien4720]

If it's cdi it has to index the crank somehow. I know 0 when it comes to dirbikes, but I work on cdi outboard motors. I've had faulty crank position sensors eat my lunch before. I also got burned by a faulty cdi box where I couldn't get the timing right even though all the linkage was set like it should be. I guess you can't check the timing at idle on this type of engine?

[@patarmstrong3582]

It's fixed by the magnets in the flywheel triggering the coil. Any spark advance is done in the cdi box, which is probably the issue. Electronic stuff like this often fails when it gets warm initially. This is probably small electronics (the cdi) at fault. Newer bikes probably have crank position sensors, and the like. I think this one is pretty simple.

[@patarmstrong3582]

The spark timing is fixed, and cdi does the spark advance if there is any.

[@TheMeekSheep]

Could the iv drip be giving inconsistent fuel? Is it vented?

[@VDUBguy]

How about an air cleaner, a little air restriction?

[@adamr9444]

cdi

[@skylerbates7621]

The diaphragm on top of the slide may have a hole in it

[@JUGGERNAUT606]

Oh man, the price just went up again...

[@StayTunedMoto]

Fired up

[@mrtyeehunter]

I think it needs to be run and blow out some carbon and heat up. It's probably really carboned up. Just a thought.

[@JdM-ep9on]

Does carb need air boot and filter for back pressure?

[@patarmstrong3582]

Probably, but 4 strokes seem less finicky about that than 2 strokes, IMHO.

[@MichaelVaughn-p9f]

Once your coil/cdi box warms up then he loses fire

[@dapeguer]

Sounds like carburetor is off balance from air/fuel. Someone played with it. How does it sound if you remove the air filter box?. If its better, buy a carburetor kit from ebay. I dunno

[@Simpleguy2313]

Woot woot 🎉

[@garyplank9756]

Overheating electrical problem condenser or coil

[@quantumbuddhist]

How old are you bub?there's no condenser in that

[@rigguyjt]

Try changing out the CDI

[@620JK]

My guess is it has something to do with timing

[@620JK]

The bouncing around is tough to follow

[@timgrogan883]

My 2 cents but it sounds the gas cable is sticking or something to do with the carburetor . Because this a carburetor channel lol😂.

[@tallywhacker75]

it dosen't seem to want to snap your leg when you kick-start it soooo i'd call that a win and sell it off.. let some-one else chase the gremlin in the idle..

[@RonHelton]

👍👍👍👍👍👍👍👍👍👍

[@WWNF911]

Camera girl, most garage projects bounce around depending on the guy’s schedule, parts availability etc. This may be why most women don’t enter the man cave. 😎

[@patarmstrong3582]

I bet around their house, it's a garage- shared space. It seems like Jake treats Camera girl like an equal partner, and I think they rock as a team. I could be wrong, but it sounded kinda like you were mansplaining or something.