sredish Posted June 20, 2008 Report Share Posted June 20, 2008 (edited) why not try 27.5 pilots? your plugs look darker than I would've guessed running a 250 main, but not sure how you colored them. if your 1 - 1.5 hours is a mixture of idling, cruising and such, then it's of no use. as you said you were going to do, you HAVE to run a hard long WOT run to AT LEAST 5th gear to get a good reading.... run it WOT, through first, into second, all the way to at least 5th, keep it held WOT and before you have to shift into 6th, while holding it WOT, pull the clutch and kill the motor simultaneously. let it cool and check the plug right there, on the side of the highway, street, road, whatever. if you want pics, take them then because if you cruise back home to check, it'll be an inaccurate coloring. edit: oh yea, run a 40:1 mixture, no richer. 40:1 is not lean at all, 60:1 is lean and some run 80:1 and I've actually heard of some running 100:1 in their drag bikes with special 100:1 oil. Edited June 20, 2008 by sredish Quote Link to comment Share on other sites More sharing options...
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