Description

Doppler ER1 racing crank for AM6 gear machines

Crankshafts are the backbone of the engine, and with a Doppler ER1 you get a full-roller racing crank of the highest quality. It’s precision balanced to 15,000 rpm so it can handle the extreme loads that occur when you push your gear machine to the limit. Compared to a standard crank, the Doppler ER1 is far more robust and precise, which means less vibration, better durability and more power to the Rear Wheels. Comes with one 6204 Bearings for use on one side, so you’re good to go from the start. The cross pin is designed for ø12mm cross pin, the inner diameter is 17mm and the included Needle Bearings measure 12x17x15mm.

Fits AM6 engine and compatible 50cc 2-stroke gear machines

Doppler ER1 is designed for machines with AM6 or compatible engines and fits a wide range of popular 50cc 2-stroke gear machines from Aprilia, Yamaha, Rieju, Beta, Peugeot and others. It’s an upgrade that typically belongs in a dedicated racing or tuning machine and is not intended for everyday street riding with a standard engine, but will only bring better durability in that case. Check the compatibility list carefully as not all years of the same model will necessarily fit.

Worth knowing about Doppler ER1 Crankshafts

• Full-wall racing crank from Doppler
• Balanced to 15,000 rpm
• Cross pin: ø12mm
• Inner diameter: 17mm
• Needle Bearings included: 12x17x15mm
• Bearings incl. 6204 bearing for mounting on one side
• Fits AM6 engine and compatible 50cc 2-stroke gear machines