1968 Norton P11 frame tubes

grabcad

This off road motorcycle had a frame from a Matchless motocross bike. I have misrepresented this a bit as there were no bent tubes and no welds. The joint fittings were all malleable iron brazed to the tubes to avoid overheating the thin wall alloy. Looking at the rear fender brace now maybe it was not chrome-molybdenum thin wall tube as it was bent. This layout is made from memory of a vehicle sold in 1976.