My 2002 is seizing up. im running 40:1 gas in stock with fmf pipes . and latly it seems to have lost horse and my spark plugs gave out after 30 minutes after putting them in brand new. and there a gas treatment i can use to flush all the carbon out .

 

Did you rejet when you changed the pipes?

 

And what do your plugs look like when you pull them out?

 

they were just slapped on. and the plugs are very black.

 

Make sure your air filter is really clean and I don't mean that it just looks clean but that is really clean and flowing air. If you said it's siezing up what do you mean? is the kick starter locking up?

 

you should prolly re-jet... but when your lean they turn white right...? and rich they go black so that dont make sense if you never jetted to begin with.