Kawasaki ZX12R Piston Set - Wiseco - 13.5:1 CR, 85.50 mm Bore (2000-2005). This Wiseco forged piston kit is built for riders updating or restoring ZX12R engines from model years 2000 through 2005, offering the correct 85.50 mm bore sizing and a 13.5:1 compression ratio.

Designed as a complete drop-in package, the kit includes forged pistons, wrist pins, piston rings, and circlips for straightforward installation. Wiseco's forged construction is chosen for its strength and durability under high-stress conditions typical of sportbike use. The piston profile and ring package are matched to the ZX12R application to retain reliable sealing and consistent performance across normal and spirited riding. This kit is appropriate for owners seeking a durable, OEM-replacement-quality piston set or preparing an engine for moderate tuning while maintaining correct bore and compression specifications.

Features

• Forged piston construction for improved strength and service life
• Includes wrist pin, rings, and circlips for complete installation
• 85.50 mm bore size — matched to ZX12R 2000-2005 specifications
• 13.5:1 compression ratio as specified for this Wiseco kit
• Made for 4-stroke motorcycle applications with relevant performance features

If you have questions about fitment, installation, or choosing the right parts for your build, give us a call — we’re happy to help. We have two locations offering installation and customization services: Austin, Texas and the Los Angeles, California area. Call: 512-982-9393 (TX) or 562-981-6800 (CA).

If you are considering purchasing multiple items, contact us for shipping discounts. We install on premises at both locations.

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