AMF HD hat dass auch gemacht mit Ihren zweitakten.
"The Dutch magazine "Motor" did an article about the air-cooled RR250 and 350 in 1972. An interesting feature of the crankshaft assy is that it consists of two separate crankshafts coupled by a sleeve which is tightened by two bolts, rather than a fully-pressed assy like a TZ250/350 crank."