Quote:
Originally Posted by JerryHawk250
I notice the same with the cooler weather. I had a lot of decel popping on Saturday mornings. I have a 125 main in now and need to bump that up and adjust my idle mixture too.
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I am surprised that I still don't need to change out the pilot. I have a feeling that it may need to bump up to a 38 once it gets into the 40's, but so far so good. Main jet wise, I think even a 135 would be the ticket once the temps consistently stop peaking above the 60's
I still find it fascinating at the subtle difference in jetting between our two bikes. I know you are about 1000ft lower than I am, but the half step difference in pilot jet has always perplexed me. Main jet wise, the difference makes more sense since you have that power jet adding fuel. After trying the 122 jet this summer I ended up going back to a 125 as it was just a bit too lean below 85 degrees. I probably should have been running a 128 to be honest.
A lot of that could come down to the difference in intakes as well as minor differences in the port work obviously. I would honestly love to get my hands on one of those mild cam upgrades from Brazil. As much as the RE250 is tempting with its 6th gear, I think being able to rev the motor past 8 without that drop in power would be more than adequate, and it would be a lot cheaper than a whole engine.
I have even considered re-working my engine build with my stock head. Porting it but leaving the deck stock and then machining the cylinder jug to reduce the quench gap and raise the compression instead.