Can you gain more HP by removing the baffle out of your stock exhaust pipe on an 06 YFZ 450.. I also want to know if you there is anything specific you can do to modify your stock pipe to get a little more hp out of the bike....

And does my 450 have to have any kind of back pressure and the reason i ask is if i remove the baffle will it hurt the engine...

 

I'm not sure but I think you need to jet it if you do.