The Doppler ER1 racing crankshaft is forged and balanced with aluminium inserts that reduce dead volume in the lower part of the engine while ensuring maximum balance and good moment of inertia. The forged connecting rod is heat treated and mounted with a nickel-chromium-silver bearing with INA needle cage for high engine speeds.
Right-hand thread for ignition!
Gudgeon pin: 12mm
Stroke: 76mm
Connecting rod: 76mm
20mm crankshaft stub
