Niche 1685 is a brand new cylinder kit for your Honda XR400R. It includes a Brand new 85mm OEM Quality cylinder, which is made to your original Honda specifications. The kit also includes a brand new stock/std sized piston kit with rings, clips, wristpin, and head gasket/base gasket as pictured. This also includes a brand new camshaft which will increase your bottom end power gains by approximately 15 percent while increasing fuel economy at cruising speed. This is a DIRECT bolt on kit that will require no modifications. As with all products we sell, we guarantee a great fit and this kit includes the best warranty. Quality & Performance is Guaranteed! As with all Cylinder Kits we sell, there is NEVER any core charge required, you may keep your original cylinder. We have shipped thousands of these kits world wide. You'll find our kits out last any other kits, with the best performance, comparable or better than OEM. Our product speaks for itself. All of our XR400R kits are shipped securely, in a custom fit foam box, to make sure your parts arrive in the condition they're supposed to be in. When you buy the Niche XR400R cylinder piston kit, you can buy with confidence knowing that your kit is coming from a company that sells more top end kits for this machine then any other aftermarket seller on eBay.