High-quality full-circle racing crankshaft from Doppler, designed for Minarelli vertical engines. Ideal for 50cc scooters such as Yamaha Slider, BW’s, and other Minarelli vertical engine models.

Benefits of a full-circle crankshaf t:

• Increases pre-compression in the crankcase for better cylinder filling and more power
• Smoother engine operation with reduced vibration and imbalance

Technical features :

• Forged connecting rod for maximum strength
• Aluminum counterbalance weights
• Crankpin diameter: 18 mm
• Includes reinforced small end bearing: 10x14x13 mm
• Suitable for engines up to 15,000 rpm
• Can be used with original or 50–70cc racing/tuned cylinders

Note: Best installed with new reinforced main bearings (not included).