What is your set-up? Do you have aftermarket pipes, a K&N filter or open air box etc...? You could try the next size up (richer) for your pilot jet, that should help your idle problem. I wouldn't really read too much into your plug color, unless you know correct time to check it (top speed run and holding clutch in and then pulling plug to inspect, this sucks cause the damn thing is real hot). I would put a bigger main jet in to see how it responds to that also, I bet 140's would work if you have aft. market pipes. Pull the snorkels if you haven't already. Have fun tinkering with it!
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