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Discussion Starter · #1 ·
I have a 2008 YFZ450 that has supposedly been jetted to compensate for baffle in exhaust being taken out. Cold or warm the bike is real sluggish when you try to throttle it in 1st or 2nd gear. Given I am normally at idle RPM or close to it. Once you get your RPMs and/or speed up the bike runs fine. Is it running too rich? Seems to me like it is getting too much fuel.

The jetting is suppose to be 168 main and 45 pilot with unknown clip # or mixture turns. I have put a stock muffler back on the bike to keep it orginial. So what is the BEST Jetting Recommendation for my setup? Remember, everything is stock.

I have read in another forum that the supposed current jets are what is needed. Any advise?
 
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