Wiseco Pro-Lite Piston Kit with Gaskets (47.50mm) PK1202 - Yamaha YZ85 2002-2019

Product Description

The Wiseco PK1202 High Performance Piston Kit delivers a complete top-end solution for refreshing the 2-stroke engine on your Yamaha YZ85. Engineered for 47.50 mm standard bore applications, this kit combines Wiseco's forged Pro-Lite piston design with top-end gaskets, a wrist pin, circlips, and a top-end bearing to restore compression and throttle response in a single service.

Forged from high-tensile 4032 aluminum alloy, the Pro-Lite piston design offers reduced weight while maintaining structural strength under demanding racing conditions. Engineered specifically for standard stroke (47.80 mm) and displacement (85 cc) parameters, this kit gives your dirt bike OEM-level fitment and reliable performance across the rev range.

Top Features: Wiseco Piston Kit

• Complete top-end kit includes Pro-Lite piston, ring set, wrist pin, circlips, top-end bearing, and a complete top-end gasket set for one complete engine service.
• Forged from 4032 aluminum alloy for high strength-to-weight performance in demanding 2-stroke conditions.
• Standard 47.50 mm bore size (47.45 mm piston diameter) tailored specifically for 85 cc displacement setups.
• Designed for seamless compatibility with standard 47.80 mm stroke lengths.

Please review the detailed compatibility data below to ensure an exact fitment match for your dirt bike before finalizing your purchase.

Fitment List

Frequently Asked Questions

Q: Can I use stock/OEM piston rings with this Wiseco piston?
A: No. Wiseco pistons must be fitted only with Wiseco rings to ensure proper fitment, ring gap, and cylinder wall sealing.

Q: What type of cylinder bore is this kit compatible with?
A: This kit is designed to fit ceramic composite bore cylinders.

Expert Pro-Tip: Always measure your cylinder bore for taper and out-of-roundness before installing a standard 47.50 mm piston. Check cylinder wall condition carefully on ceramic composite cylinders, and make sure to gap the Wiseco rings according to the included instructions prior to installation.

Recommended Pairings:

• Yamaha YZ85 Performance Parts & Upgrades
• Piston & Top-End Kits Collection
• Yamaha 2-Stroke Performance Parts

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