i installed a Boreem (BMS) 125cc motor in our quad frame after our other motor started to fail. Everything is running well, but want more performance.

So far it running a 14-40 front-rear sprocket combo, 18" rear tires, 22mm carb, twist throttle, oil cooler and is a manual clutch setup. Oh and it does have an aftermarket cdi and exhaust.

Thought or ideas? We'd like to race, but can't exceed 125cc for a 4-stroke.

 

Jetmoto sells a real nice pipe muffler combo for their 125/110. i have 1 on my 125 Jetmoto and its a real nicely made product.