ProX Piston Kit for Yamaha YZ65, 43.45 mm (01.2018.B)

The PROX 01.2018.B Piston Kit is designed for Yamaha YZ65 applications requiring dependable replacement engine components. Precision machined on advanced CNC equipment, this piston is manufactured for consistent quality, accurate fitment, and reliable performance in demanding motocross conditions. The 43.45 mm piston size provides a precise replacement option for compatible Yamaha YZ65 engines.
The kit includes the piston, ring kit, wrist pin, and circlips needed for a complete piston replacement. Each component is selected to work together as part of a properly matched service solution, helping simplify installation and reduce the need to source individual parts separately. Always verify engine specifications and application compatibility before installation.
PROX oversized piston options are developed according to manufacturer-recommended piston-to-cylinder-wall clearances. Proper clearance is essential for piston movement, heat management, durability, and efficient engine operation. Professional installation and accurate measurement of the cylinder are recommended to confirm the correct piston size and clearance for your engine.
Built for riders, technicians, and engine builders, the PROX 01.2018.B Piston Kit offers a practical replacement solution for maintaining Yamaha YZ65 engine performance. Follow the manufacturer’s service procedures for assembly, ring installation, wrist pin retention, break-in, and final inspection.

Features:

• Brand: PROX

• Part Number: 01.2018.B

• Application: Yamaha YZ65

• Piston Size: 43.45 mm

• Manufacturing: Precision machined on CNC equipment

• Clearance: Oversized options follow manufacturer piston-to-cylinder-wall clearances

• Kit Contents: Piston, ring kit, wrist pin, and circlips

Ships from Parts Unlimited.