Before you get too caught up in your dream of making a monster that will eat a 450's lunch, step back and work on suspension. That goes for even a light motor build. Everytime I get on any quad forum there is at least twice and a lot of times 3,4,5 times as many people viewing the engine thread over the suspension thread. I know how it is, I've been the little kid in a candy store when someone mentions big bore or porting. The blaster more than other quads is severly crippled in its stock stance. When Yamaha designed this thing performance and handling were not at the top of their list. Yes, it is rather slow in its stock form motor wise it wasn't designed as a race bike, but you guys aren't maximizing all of its potential from the factory.