This 1975 Yamaha GPX snowmobile engine .25mm OS piston is used and is in good shape. We're listing a lot of GPX stuff if you view seller's other items and I'm willing to do package deals through eBay as well. Shipping is only in the lower 48; unless you are purchasing through eBay's Global Shipping Program. If you are in Alaska please contact me before purchasing to check on shipping options. Thanks, -Paul