Like the Adler, this engine’s clutch was on its crankshaft (Tohatsu did the same with their LD twins). There were two problems with this. First, sure, because torque is less on the crankshaft than it is after a 2 1/2-to-one primary gear reduction has multiplied it on the gearbox countershaft, you’d think a crank-mounted clutch could be smaller, lighter. Wrong! When you make a racing start on a 250, you pin the throttle and control the drive by slipping the clutch. That means some power goes to the rear wheel, and some goes into frictional heating of the clutch plates. The smaller and lighter the clutch plate stack, the higher its temperature goes during the start. With the TD1 you basically got one start and then had to disassemble the clutch to replace warped, burnt, or cracked plates. Owners learned to perform this work quickly, efficiently – and often.