This is my ice bike, a 1980 GN400 that has been converted for ice racing. I bought it from a friend. I did fab my own hanger for the SuperTrapp muffler and revised the intake. Did a bit of head work, and I will be re-jetting the carb for more power. All the street parts have been stripped off to save weight so the bike is now under 300 pounds. Right now it will not start (kick only) which I suspect is a timing issue since I do know it ran before. Compression is very good, as is spark and fuel. Looking forward to some winter fun here in Wisconsin!