its a 1987 yamaha G2....the stock 285cc engine runs good, and with all the mods to it, K&N filter, re jetted carb, cutom modified muffler, governor and RPM limiter removed, and the torque spring in the CVT to keep it in a lower gear, it runs better than any other stock enginegolf cart ive found...but i want MORE...next in line is an 18HP briggs vtwin, modified with a few goodies to over 30HP....