Hey guys my yz250f's exhaust is turning glowing red after i let it idle for 2 mins after i start it wat is wrong? :-/ :-/
Red hot exhaust!?!?!?!
- Thread starter 01 fmf blaster
- Start date
my buddies yfz450 does that. we dont know y. it just does an we have it rejeted right. then he logged onto the yfz forums an they said it does that from the factory. it will litlerly melt jeans if ur leg hits it. so from that id think its fine. im not an expert but thats just off info that we looked up for his quad. so idk
if it just started doing it... is something in your exhaust??? if a mouse gets into the muffler and makes a nest it will jack the back pressure up which will make it run hotter... or did the temp just drop alot recently?? if so its a lean condition
not sure in that bike but on the 450 with a am pipe its supose to glow so far out.....to much glow your to lean
man aglowin pipe would worry me... only time i ever seen pipes glow was when a piston let go on my 89 conquest tsi and the turbo manofold and exhaust side of the head were bright orange!!
It shouldt glow if it idles for only two minutes, it is too lean, how does it run in the lower throttle ranges? Does it bog? If that is the case then it is lean. If you havent done the BK carb mod then you should do that also, it makes them run so much better
After the yfz450 came out yamaha was telling people the reason the exhaust was turning red was because of the thin wall tubing they used to make their exhaust.
ok im getting alot of explanations here Ive heard its lean or something got clogged in then jets making it lean. and other people telling me its normal.... i haven't ridden it cause i dont want anything to happen ill try today and tell yall what happens
well it is normal if you are riding it around to glow about 3 inches past the exhaust port. But it shouldnt glow if it is just idling for 2 minutes, if the idle is set right, and it is jetted right
the big part of my FMF pipe that i got with my blaster was so clogged up with a mouse nest that water couldn't flow through it lol. it took about an hour and a half with a coat hanger and running water to get it broken up/flushed out lol
i am talking about an am pipe HMF....its states in the directions that it should glow a few inches out from the exhaust port....any more then that it is lean
I agree that it is too lean. When I put and aftermarket exhaust on my streetbike the header would turn cherry red down to the first bend on warm up. Then I had the bike tuned Fuel injected. It was fine just cherried up about a half inch. And before the tune the power commander was always on the lean side of the meter.
Similar threads
