Polini 12mm Wrist Pin Circlip for Polini Cylinder Kits for Scooters & Mopeds

Polini 12mm Wrist Pin Circlip for Minarelli-Based Engines

The Polini 12mm Wrist Pin Circlip holds your wrist pin firmly in position. It is made to suit Polini cylinder kits used on Minarelli-based 2-stroke scooters and mopeds. You can find it alongside the scooter big bore & cylinder kits that support a proper engine build. Circlips are sold one at a time, so a complete installation requires two, one for each end of the wrist pin.

Construction and Design

The circlip has a C-shaped body formed from spring steel wire, with two inward loops that seat in the groove of the wrist pin bore. This arrangement gives a secure fit and keeps the wrist pin correctly located inside the piston. Fitting it correctly matters for good engine performance.

When to Replace

Swap out the circlip whenever you work on the piston of your scooter or moped, or if you spot wear or damage. A worn or faulty circlip may allow the wrist pin to shift, which can result in engine failure. Checking it during routine service is an easy way to prevent that problem.

Specifications

• Type: C-clip / wire circlip
• Wrist Pin Diameter: 12mm
• Material: Spring steel wire
• Sold: Individually (2 required per piston)
• Fits: Polini cylinder kits with a 12mm wrist pin on Minarelli-based 2-stroke scooter engines

Fitment

Fits:

• Minarelli AM3 2-stroke engine (Polini cylinder kit, 12mm wrist pin)
• Minarelli AM4 2-stroke engine (Polini cylinder kit, 12mm wrist pin)
• Minarelli AM5 2-stroke engine (Polini cylinder kit, 12mm wrist pin)
• Minarelli AM6 2-stroke engine (Polini cylinder kit, 12mm wrist pin)
• Similar Minarelli-based 2-stroke horizontal and vertical engine variants (Polini cylinder kit, 12mm wrist pin)

How to choose: Check the wrist pin diameter first. This circlip is only for a 12mm pin, and you need two per piston.

Shop more: Scooter Big Bore & Cylinder Kits · Scooter Pistons & Piston Rings · Scooter Parts