Nice article . This confirms the 400,000 number for the K model I'd read earlier. Not millions but still a LOT of bikes. I believe the H-man book states the early K0 had 67-70 HP and could go 130mph. He goes on to say by the time the 76 was produced it was making 45hp and had trouble going 100mph. A large part of his book however is devoted to restoring the later bikes so they will run like the early ones.