Bearings and Crankshaft seals Piaggio 50 2T Polini scooter

Bearings and crankshaft seals Polini for Piaggio 50cc 2-Stroke scooter.

This Polini crankshaft bearing and seal kit is designed for maintenance, repair, or rebuilding of the engine crankcase on Piaggio 50cc 2-Stroke scooter engines. Developed to replace worn original components, it allows the renewal of the crankshaft supports and restores proper sealing in the crankcase.

It is recommended to replace the bearings and seals during a complete engine rebuild or when symptoms such as play in the crankshaft, internal metallic noises, or possible air leaks that may destabilize carburetion are observed. A loss of sealing in the seals can affect engine operation and hinder proper crankcase induction.

The kit includes bearings with C4 internal clearance tolerance and riveted steel cage, suitable for use in two-stroke engines, whether original or tuned. The PTFE and FKM seals offer high resistance to fuels, lubricating oils, and demanding operating temperatures, helping to maintain the sealing of the pre-compression chamber.

Technical characteristics

• Manufacturer reference: 282.0001
• Product type: crankshaft bearing and seal kit
• Application: Piaggio and Gilera 50cc 2-Stroke scooters
• Bearings: 2 units of 20x52x12 mm
• Bearing tolerance: C4
• Cage: riveted steel
• Seal 1: 1 unit of 18x28x7 mm
• Seal 2: 1 unit of 19x30x7 mm
• Seal material: PTFE and FKM, also known as Viton