Hi Guys, My son recently picked up 98. The machine seems very flat until you hit the powerband. I am not sure what was done inside the motor, the previous owner said he never had it apart. It does have a set of Bill`s pipes and silencers, also has a K&N filter with no lid. It has 34mm Keihin carbs with a 55 pilot jet and a 165 main with the needle clip in the top slot. we are at 1100 ft and the temp can vary from 20`s to the 90`s here in the northeast. I do not have a lot of experience with jetting and any help or suggestions would be greatly appreciated. Thanks