Expensive 125cc Engine Tuning

New race engine

This is kind of the extreme option, buying or building a full race spec engine. You would have a fully tuned engine, in the case of the Aprilia RS 125 you’d be looking at around 40 bhp, with an engine life expectancy of under 2000 miles and that’s if you were lucky. The only time this would be an option is if the bike was an occasional weekend and track tool. It would be very good, very expensive, and very unpractical.

NoS

NOT for your 125cc bike though...