I got this xr100 4 a little of nothing and put it back together and running good. Now i want to get more power out of it. I know about the big bores just want to know what the best to get a big bore are just get it bored with a wiseco high compression piston. What other good part can i get ,cam, carb(jets),rev box, sprockets,

 

More cc's = need's more airflow. (Definitely: good air filter, jet kit. Possibly: bigger carb, better exhaust)

You going 110cc? 125cc? 140cc?

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