Can somebody give me some info on this kit, i'm curious about it. How does it compare to sending your motor away to pro fab, TC, East coast ATV. Hows the HP gain? Any info would be helpful.

 

JE makes the piston for IMS.

Make certain you replace the cam with something bigger than stock or the XR400. Also check the deck height while assembling, you may find that the 11:1 isn't really that. Thinner gaskets may be needed, or even decking the cylinder.