trx 250r not runnin quite right - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 06-15-2009, 09:47 AM Thread Starter
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Unhappy trx 250r not runnin quite right

Got a 86 trx250r.
- high compression head gasket .01 (or is it .001) thickness. its paper thin
- ported and polished
- v-force 3 reeds
- fmf gold exhaust

When its cold it screams but when it gets hot I think its preignitioning. The plug looks fine - but i haven't been pushing it like a want to. I think the main jet is a 120.
93 octane gas all the way. mixture isn't exactly 32:1 but is pretty close (maybe 34 or 35:1)
It there a way to adjust timing on these? should my jet be bigger? Any ideas
bendiesel is offline  
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post #2 of (permalink) Old 07-16-2009, 07:26 PM
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sounds like ur runnin a lil bit lean richen it a lil try that
jerm0314 is offline  
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