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I'm not sure what i'm doing wrong?
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Well, for one thing like many others you're ignoring the more important jetting issue......the needles. The mains aren't what is influencing the plug color unless you are riding it near full throttle all the time. People change mains and think thats the end all and be all of jetting, but they miss the fact that most of your riding is done in the needle's range, not the mains. I would try shimming the needles. Try one shim at first. If it runs fine in all ways including wound out thru gears, go to 2 shims. You could even go 3 and if it begins running incorrectly back down to 2. But i think by the time you hit 3 it's thruxton needle time.
Anyway, the 130's are as high as you'd probably want to go on the mains. Might even be too rich regardless of the plug color unless you ride full out all the time. But shim those needles ! Thats definatly your problem IMO. You're running pipes UNI and snorkel off which is a good bit of change from stock, yet you have stock needles. By the way, you should also find that the shims will give you a good and possibly suprising boost in midrange power and accelleration.
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