Minarelli Wrist Pin Bearing - 10mm or 12mm

Minarelli Wrist Pin Bearing for 50cc and 90cc Engines

This wrist pin bearing is made for Minarelli-style engines and comes in two options, one for 50cc and one for 90cc models. The 10mm size works with 50cc engines, and the 12mm size works with 90cc engines. It belongs to the range of Minarelli 50cc / Yamaha jog scooter parts that help keep an engine running smoothly and dependably.

Signs It Needs Replacing

The wrist pin bearing links the piston to the connecting rod, so it plays a vital role. As it wears, performance can drop and the engine can be damaged. Unusual noises or a noticeable loss of power are good reasons to check it and consider a replacement.

Build and Compatibility

Two sizes are offered: 10mm and 12mm. The 10mm bearing suits Minarelli 50cc 2-stroke engines, and the 12mm bearing is intended for 90cc 2-stroke engines. Choose the size that matches your engine so it performs as it should.

Specifications

• Size: 10mm ID x 14mm OD x 12.5mm length
• OEM Part Number: 105-78 10 (10mm) / 105-78 12 (12mm)
• Fits: Minarelli-style engines: 10mm version for 50cc 2-stroke, 12mm version for 90cc 2-stroke

Fitment

Fits:

• Minarelli 50cc 2-stroke engine (10mm wrist pin)
• Minarelli 90cc 2-stroke engine (12mm wrist pin)

How to choose: Measure the diameter of your wrist pin. Use the 10mm bearing for a 10mm pin and the 12mm bearing for a 12mm pin.

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