Just bought a very new KLX 140 2011 with about 2 hours use only. Got it for the wife and daughter. We just took it for a ride today but it could do with a bit more grunt. I am thinking a performance pipe and jetting. Does anyone have any suggestions and what size jets to get. I haven't taken the spark arrester off yet, but that's next. BTW do 2009 plastics fit the 2011 model?