Are there any good ways to build a fast raptor with out using a aftermarket exhaust? The after markets are way to loud. I added a k&n and removed the lid but thats about it. I was thinking about a CDI but i know on cars they will not show on a time slip even tho they throtle better. The high comp piston will produce minimal HP with the stock exhaust so there is no really good way but to tune you're stock quad. Anybuddy know a good way to do it?

 

get rid of the wall in the middle of the pipe, take off the spark arrestor and then get a long screwdrive and a hammer and cut that wall, you should be able to see the wall with a little hole where everything comes out, so if you get rid of that wall and take off the spark arrestor, you should notice a significant increase in power with proper jetting

not all aftermarkets are loud, if you want more speed but youre willling to loose torque, buy a 14 tooth front sproket

 

i bought a yoshamaua rs3 and it is too loud, if i put the quiet core it will lose most all of its porformance. I might try to fit a YFZ450 or raptor 700 Exhaust on my 660.

 

cut a 1/4 strip along the bottom of the slipon...