WISECO 797M05450 .020-Inch Oversize Dirt Bike Piston Kit for Yamaha

WISECO ATV-DIRT BIKE PISTONS.
*  All Wiseco 4 cycle pistons come complete with rings, wrist pins and circlips.
*  Only Wiseco replacement ring sets can be used on Wiseco pistons.
*  All Wiseco 2 cycle pistons are supplied with rings and circlips.
*  Wiseco 2 cycle pistons are not supplied with a wrist pin unless noted in the description.

Upgrade or restore your Yamaha dirt bike engine with the WISECO 797M05450 Dirt Bike Piston Kit. Designed as a .020-inch oversize replacement, this piston kit corresponds to the common .50 mm oversize specification and is intended for Yamaha applications requiring cylinder correction or piston replacement. Wiseco is recognized for producing performance-focused engine components designed to support dependable operation in demanding off-road conditions.
This piston kit is suited for engine rebuilding, top-end service, and cylinder work where an oversize piston is required. The .020-inch oversize specification allows the cylinder to be machined and honed to the correct clearance when supported by the engine manufacturer’s service specifications. Proper preparation and professional measurement are essential for achieving the correct piston-to-cylinder fit, compression, and long-term performance.
The WISECO 797M05450 is supplied as a kit for convenient installation during a Yamaha dirt bike top-end rebuild. Before ordering or installation, verify the piston specification against the motorcycle’s year, model, engine configuration, cylinder condition, and required oversize. Always follow the applicable service manual for bore preparation, ring installation, piston orientation, torque settings, and break-in procedures. This product is identified by Wiseco part number 797M05450 and should be selected only when the .020-inch oversize requirement matches the intended Yamaha engine application.

Features:

• Wiseco 797M05450 piston kit designed for Yamaha dirt bike engine applications

• .020-inch oversize specification, equivalent to the commonly referenced .50 mm oversize

• Intended for top-end rebuilds, cylinder correction, and piston replacement

• Kit format supports convenient installation during engine service

• Requires application verification and cylinder machining to the manufacturer’s specified clearance