2 Stroke WON'T IDLE and runs really bad, no power - HOW to FIX 

You make some good points about what to check out before the carb. I'm having low end power issues on my 300 and have a feeling that it is the seals on the header. I know one is totally gone and am willing to bet air is being pulled in at low rpm and not at higher revs. I'm gonna start there because i haven't changed anything that should affect the jetting. Thanks brother

great video, thanks for shoutout man! My turn now ;)

Great video!! You did a great job👍🏼

between you and dirt n iron i have learned so much about my KTM 300 EXC i just bought (1994) you guys are the best

Great video , always remember fresh full tank of premix gas always helps too lol , not with cheap ass gas though . # 99 kx 250

Thank you, very helpful.

i also learnt from dirt N iron youtube channel about carburetor. I highly recommend his video, i never foul a plug anymore.

Great video, covers all the baseline checks

watching this video on my phone... I thought you had something hovering over your head. 😆

my favorite mistake was putting a rag in the air box... it ran odd.... Then it sucked that rag into to cylinder of my 1985 Cagiva 500 wmx. side bar:: it would run Backwards! the first time i put it in gear and zipped off in reverse!! it was Rare but exciting event..

Amazing awesome advice!

Carb tuning can be tricky ...depending on your riding style changes things as well. Be advised some 2 strokes shouldn’t idle (race tuned Japanese machines) ...they usually have a fat pilot jet in order to get the best throttle response off idle to full throttle under heavy loads...personally I prefer my 2 strokes set up this way...I don’t care about idling really, I want instant power with as little bog as possible 👍 great vid as always, I like your buddies channel too👍

Will worn reeds cause flooding. My 2016 250xc starts up idles for not long then dies. Does not start again after that until it sits for a while. Pulled my reeds off and there is light coming threw the right reed flaps both top and bottom. Also excess gasoline sitting under the reeds on the case. Was riding it shortly before it died while high rpm was fine low was boggy and not wanting to stay running.

Nice video. Lastly, also make sure you have fresh and well-mixed fuel.

Great video bro but i noticed looking at your carb that it appears your idle screw looks to be almost out of adjustability to increase your idle ( it's almost screwed all the way in). if so, it's being caused by your Pilot/Slow jet is too rich, I had the same issue with my Cr500. I changed the Pilot jet from a 58 to 52 and now i have all kinds of adjustment available, throttle is crisper and produces more power. I'm dropping it to a 50 jet that's coming to me soon, just some input.

dude great tips

Mad vid, pro tips.

Hello, I have a 2020 300 TPI with 40hrs on it, its been a motard from brand new just a couple months ago. About 3 weeks ago I had the ECU flashed and installed a higher compression head. The transformation was nothing short of a miracle, It was as smooth as a four stroke but with the punch of a two stroke. There was simply no more stutter, it was a dream come true and changed my life... have I talked it up enough? THEN I jumped on it couple days ago and it wouldn't idle it was spitting black oil out the pipe, running rough in the lower revs. I contacted the place that did the tune and made the hi comp head and he said it could be a faulty temp or crank pressure sensor or possibly need a top end rebuiild but unlikely at 40hrs. I put it into the dealer and everything checked out fine. It did however have a gummy crank pressure sensor pipe which they cleaned. They gave me the bike back and said it was fine... its not, nothing like it was after the tune and head install. Still runs rough, has a low idle and flames out, not good when you've lane filtered and want a spirited takeoff from the traffic at lights. Any ideas???? Thanks........

Would be helpful to show what a lean vs rich bike sounds like. I honestly have no clue if I’m rich or lean but the bike will not idle.

Hey, I have a 2014 crf450r. It idles high, runs rich and burns too much fuel. The throttle body adjuster is at its lowest setting. Can you help me please?

Nice link

My motor died on my Sunday do you think it could be reeds?! It has compression!! No rattling on the top end when trying to kick!! Any ideas?!

Why you startin your bike like thst?

Imi place cand vad romani profesionisti si dedicati bravo

My throttle has a free play new cable and tube and idk it shuts my bike right off if I hold it and give it gas it works ..I just rebuilt it

My 98 250 is Erving high how to fix it is troubling me ? Please healp

My 01 ktm starts and idles ok, but its hard to start.... gotta kick it several times. Reeds, plug, exhaust o rings, air filter etc.. all new

actually jetting is also important depending on your altitude your riding at

Look at you nidle pin if you didn't change it. Put you hand over the air intake for the carb. It will vamit gas. Maybe a storage additive may help. I took a lighter to my Jets and let them sit in car fluid carb cleaner

Is it possible to set 2stroke carburetor/engine to work like in this video when it's freezing cold and fuel can't evaporate correctly ?

Bike won’t stop acellarating when it starts. Won’t idle. Now when I got o start it down hill makes engine noise but doesn’t start up and when it does it does. Also I’d it does start and I pull clutch sounds like I’m flooring it in manual mode

New subs on both

brilliant video ,im having problem with my sons 50cc Aprilia sx he has fuel screw on carb once adjusted the bike seems to be running great until you go on a ride and the idle speed shoots through the roof .any ideas

Ok useful, what about crank seals would that effect the idle? Bike just feels not right at low revs and will occasionally cut out.

I wonder if you could help me i have a kx 80 1991 with a 1989 engine and a kx 100 cylinder bolted on the bike splutters and has no power until it comes in to the bands and then it runs like a bat out of hell back wheel every gear it has a 122 main jet 55 pilot any help would be much appreciated thanks

Technically it's not an explosion unless your engine is knocking hahaha, no worries combustion is the word for a controlled expansion inside an Internal Combustion Engine =)

hey mate, i have a 50cc mini quad 2 stroke. i have cleaned the carb, replaced the spark plug, it struggles to start ..only after 4/5 pulls. when it does start with choke off it runs for 20/30 secs and the revs eratically for few seconds and cuts off? any idea ?

Is there supposed to be an o-ring on the air screw?

I have a yz450fx 2022 it’s stalling in low rpm I change the spar plug and I still doing the same , and it’s hard to get it running at cold start and keeps killing the battery , ,can you give an idea of what it’s going ob please

can you install a fuel filter on a 2t ?

I see you've still got the red chain. Seems okay?

Hey brother I’m a LV local and was wondering if you wrench on 2 strokes? I need a good local mechanic and your far more qualified than I am.

He forgot to mention your silencer, the wraping will soaknoil and make you lose like 5 hp if it's junk

🙏

What is that green ball floating above his head 👽💀👽

my idle has been starting to go downhill a little since i changed my main jet, i guess that means it is a bit too big

Keep in mind if you bike was running fine, then dies but kicks over. You most likely fouled a plug. This will happen in the worst of times, like middle of a race or on the highway...ALWAYS put a few spare plugs in your mobile tool kit.

Please do 4 stroke iv ktm 350 sxf and can’t set up my idle starts fine but when gets hot won’t start

I wish you would’ve explained the whole thing, but thanks for the half explanation.

my rm-250 starts very slowly as in the video 😭

i had slow idle, would cut out. adjusted idle screw 1/4 turn, bike stalled and i cant start her since :(

Lol you ever heard of warming bike before ride it was funny tho

I'm sorry but I must say it.. It's kind of weird tick. Dracula

My hands are melting because of the carburetor cleaner. your fingers as well as your rubber gloves

Pretty basic.... how can somebody own a bike and don't know this?