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Join Date: Sep 2005
Racohoon is right on: You don't HAVE to rejet. There is probably a bit more power to be had - and the confidence of knowing that you aren't running needlessly lean (even if just a bit), which will make the engine run hotter. Correct jetting also reduces the vibrations that are felt at the pegs and handlebars.
Adjusting the fuel screw may or may not help the problem. The fuel screw only affects starting, throttle response and up to 1/4 throttle. You may actually be lean in that range and rich in the needle or main jet.
But, as far as the fuel screw is concerned, I'd encourage everyone to remove those caps and get to know how adjusting the screw affects your throttle response, cold and hot starting, deceleration popping - and vibration. At a minimum, you will find real differences between mid-summer and mid-winter.
mtvaill: You may want to clean your spark plugs and then go for a long ride. Then check your plugs and see if they confirm that you're running rich.
Also, did you use new gaskets when you installed the pipes?
Good luck, Mark