I have an 2001 banshee, sst pipes, fmf rad valves running 270 jets and a boost bottle. Should i go with the pro design cool head or go through the hassle of having the motor bored to get more power?? If boring is the answer how much over and will it increase my motors chances of going poof!!!

 

Don't know too much about banshee's but have you seen the latest mag out with the FMF 400 kit. It has the power valve set up. Looks like that thing will kick some....