The Motoforce Racing crankshaft for Minarelli vertical engines delivers high-compression performance built for serious tuning.

Forged from hardened steel with a silver-plated FAG small end bearing, this racing unit features PTFE plastic inserts that reduce dead volume and boost pre-compression for maximum power output.

Engineered to OEM dimensions, it installs without modification on 50cc and 70cc sport and racing builds. Capable of sustained 13,000 rpm operation, this reinforced crankshaft is the foundation for reliable high-revving setups on Yamaha Slider, MBK Booster, and similar Minarelli vertical platforms.

• Small end bearing: 10 x 14 x 13 mm
• Piston pin: 10 mm
• Direct fit for Minarelli vertical engines
• Tuning level - Sport