12mm Wrist Pin Bearing for 1100-1360 Minarelli Kit

12mm Wrist Pin Bearing for Minarelli 50cc and Yamaha Jog

This 12mm Wrist Pin Bearing is designed for use with big bore kits, specifically for 1100-1360 Minarelli engines. It sits on the 12mm wrist pin of the piston assembly and suits horizontal Minarelli-style engines. It is one of the key Minarelli 50cc / Yamaha Jog scooter parts that helps keep operation smooth and consistent. It is sold on its own and plays an important role in protecting the engine during top-end rebuilds.

Build and Fit Details

The bearing uses a needle/roller layout, which keeps friction low while handling heavy loads. It is made to match big bore kits in the 1100cc to 1360cc range. It also fits a range of 50cc engine designs that share the same piston assembly.

When to Replace

Swap this bearing out at every top-end rebuild, together with the piston, gaskets, and rings. Doing so supports reliable engine performance. Checking parts regularly can reveal early wear and help components last longer.

Specifications

• Wrist Pin Diameter: 12mm
• Bearing Type: Needle/Roller
• Compatible Kit: Big Bore 1100-1360
• Engine Platform: Horizontal Minarelli 50cc
• Sold As: Individual
• Fits: NCY big bore kit 1100-1360 and other horizontal Minarelli-based 50cc engines with the 1100-1360 piston

Fitment

Fits:

• NCY big bore kit 1100-1360 (12mm wrist pin)
• Horizontal Minarelli 50cc engines (12mm wrist pin, 1100-1360 piston assembly)
• Other 50cc platforms using the 1100-1360 piston assembly

How to choose: Confirm the wrist pin on your piston measures 12mm, then use it with the NCY 1100-1360 big bore kit or its piston assembly.

Shop more: Minarelli 50cc / Yamaha Jog Parts · Scooter Pistons & Piston Rings · Scooter Bearings · Scooter Parts