help!!! backfire

acer1234acer

New Member
Oct 23, 2012
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i have an 06 blaster wit 200airsal triple port it start right up but when i go fast n let go of the gas it backfire n sometime it will rev up by itself when idle what could it b im thinkin of an airleak r main jet? thank you
 


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thank for the help n i want to no if im runnin lean? i have an oko 30mm wit 158 main? is tha to big r small for triple port
 
thank for the help n i want to no if im runnin lean? i have an oko 30mm wit 158 main? is tha to big r small for triple port

Oh no not the dreaded OKO 30mm.

Jetting could be ok, you should check for air leaks a your symptoms describe one.

I am a Mikuni man, and know very little about OKO carbs, and to tell the truth, I really do not want to know.

Someone with OKO knowledge will chime in with jetting info I am certain of that.

Plug chop to confirm jetting after the leak test.
 
air leak bud i use an oko 30mm and the only "issue ive ever had with them is that you have to clean them out a little more often than other carbs but they rip for stock bikes for the most part. if you had to I would scrounge e-bay for a 32-35mmcarb I saw one on there the other day for 40 bucks