I have a 2005 TRX450R with a k&n airfilter, a pro circuit slip on exhaust, and the honda hrc kit. When I run the bike it sounds great at idle and reving, however when accelerating the bike begins to stutter when it hits the high rpm's. Any advice at what could be wrong? Ive changed the spark plug, changed the oil and filter, and also clean the air filter but still no luck.

 

If it is fine in the low and mid ranges....sounds like your jetting just isn't quite perfect on top. This would be your main jet. A different shaped needle can help sometimes as well, but the needle position is probably correct.

 

Thanks for the tip. would you recommend any size jet?

 

Pull out the jet that's in there, and see what size it is. Jets are cheap, so get one a size bigger and a size smaller, and try those.

 

I use to have a Honda motorcycle that would do that and it was the spark plugs. They looked like they were new but change them and the problem went away. Just a thought.

 

ya i already did that and changed the oil and cleaned the entire carb. does anyone have any suggestions on what size jet i should run? it has a 185 in it already.

 

<div class="FTQUOTE"><begin quote>Originally posted by: reconranger

Pull out the jet that's in there, and see what size it is. Jets are cheap, so get one a size bigger and one size smaller, and try those.</end quote></div>