Does anybody know if you can bore out or port the cylinders? I e-mailed FMF but they dont seem to want to answer. I cant give up my 420's power and torque.

 

Many fully modified 350's should be putting out 60hp, the trick would be to get a wide powerband like powervalve cylinders usually produce. At $1800.00 retail plus at least $350.00 for the recommended 35mm carbs that would be $2150.00. That's if you can install it by yourself. Doing a topend is not that complex. There are ALOT of places that could build you a 60 hp Banshee with a great powerband for quite a bit less money.