just installed this set up. fast fast fast fast

 

Did you buy a couple new clutches too?

 

why is this set up a bad idea????????it runs good right now

 

Acceleration is going to suffer greatly and there will be a lot more stress on the clutch when you launch. I really dont think many built raptors have the power necessary to really pull a 15 like a stocker does a 13. And if your bike is stock, I'm awfully sure you dont have the power.

If you do a lot of very high speed road running, fine. If its street legal, sure. But in the very least I'd suggset some stiffer clutch springs. Otherwise if you're running a trail or dune machine you are probably a good deal slower than you were with the stock 13 tooth on anything less than a mile long run. The bike just doesnt pull the gearing well, its too high.

 

bump what maddog says.