Hi everyone!! I'll get right to the point, i have two good friends with Warriors. He loves his bike but he wants to hang with my other buddy and me on our 400's. The warrior is all stock, even tires. he's thinking white brothers e-series slip on, pro flow filter kit, and jets. he also plans on changing tires to a reasonable size, probably 20''. but wants more top speed and acceleration. how many teeth should he drop on his rear sprocket?? for 20'' tires more top speed than stock and more acceleration. thanks in advance.

 

Depending on how competitive he wants to be, he is going to have to do so major modifications. Where does he want to keep up at and how competitive is he now? Motor work is going to be essential.

 

To hang with 400s you need pipe, cam, filter, porting, high compression piston and your good to go. I run a 15 tooth front sproket and it was pulling it fine.