If you want a lot more top end, put on a bigger front sprocket, and a smaller back sprocket. It is very hard to explain why, but the best way, is go look at a multi-speed bicycle. when you are in first gear, your front sprocket is the SMALL one, and the back sprocket is the BIG one. And if youve ever ridden a bike like that, you know no matter how hard you pedal, you dont go fast, but that would be your "wheelie" gear. Now, say you move up to the highest gear, for example, mine is 21. When I am in 21st gear, i have to pedal really hard to take off, (keep in mind if you gear your quad hi like this, you wont be able to do wheelies worht &^%$) But your top end is the highest it could be. Hope I helped, if you need a better explaination, ask, ill check back. Oh and if you want it geared low, put a SMALL sprocket on the front, and a BIG sprocket on the back. This is the cheepest method i have ever found. You could even make your warrior do about 80 mph.

 

Contact Bike Worx, in Maynard Mass. They are making three kits. A 673cc and 686cc, stock bore
and highcompression pistons. This will give it 10 hp. over stock. And they offer a Bib Bore kit, that they would need yor engine in house to modify. this is a 724cc, which would bring it up to 75 hp. So they claim ! Can you say `cha-ching'