its all in how its built and how its tuned..
people that have problem after problem with ANY motor in a banshee is either not doing somethign right, not tuning it right and "just seein if it goes away" or driving it all wrong " gonna go to tha riva today" i cannot tell you how many banshee's come through here that are just totally rigged up or falling apart or held together with bailing wire and duct tape. i tell people that own these that they are more like a ferrari then a chevy pickup. one thing wrong and its goin to affect the whole bike.
i have a couple 4 mills that are over 3 years old and these are not dyno queens these are multiple tank, heavy useage, hard riding bikes ran on the dunes. and in the trails..
proper useage, proper assembly and proper maintenance goes a LONG way