The BCR OEM-type crankshaft is designed for Piaggio 50cc 2-stroke engines: a dependable part that stays true to the original dimensions. It is a direct replacement, no modifications needed.

When to replace it

The crankshaft turns the piston’s up-and-down motion into rotation and passes torque to the transmission, making it the heart of the engine’s bottom end. Worn bearings and rod bring play, vibration and lost efficiency; a new crankshaft restores the original smoothness of the two-stroke.

Features

• 12 mm diameter wrist pin
• 39.3 mm stroke
• 80 mm connecting rod
• Standard dimensions: direct replacement for the original

Compatibility

Many models with the Piaggio 50 2T engine: Aprilia (Scarabeo, SR, Mojito, Sport City One), Derbi (Atlantis, Boulevard, GP1, Sonar, Variant), Gilera (DNA, Runner, Stalker, Storm, Typhoon), Piaggio (NRG, NTT, Quartz, Sfera, Typhoon, Zip) and Vespa (ET2, LX, LXV, Primavera, S, Sprint). Open the table for the full list.

Fitting tips

Ideal for workshops and enthusiasts planning an engine overhaul: it is wise to replace the bearings and oil seals too and to use new gaskets, following the tightening torques in the workshop manual.