Yamaha FZ1 Piston Kit - Wiseco - 74.00 mm Bore, 13:1 CR (2001–2005) is a complete forged piston package designed for riders upgrading or rebuilding their FZ1. This Wiseco Forged Series kit provides the core components needed to replace or refresh the top end of your 4-stroke engine.

Built for durability and consistent fitment, this kit includes the forged pistons, wrist pins, piston rings, and circlips to simplify installation. The 74.00 mm bore and 13:1 compression ratio match common high-compression rebuilds and many enthusiast tuning setups for the Yamaha FZ1 (model years 2001–2005). Forged construction improves resistance to high-stress conditions that occur under spirited riding or modified engines, while precise machining helps maintain reliable clearances and piston-to-cylinder tolerances.

Features

• Forged piston construction for increased strength and durability
• Complete kit: pistons, wrist pins, rings, and circlips included
• 74.00 mm bore size with 13:1 compression ratio for FZ1 (01–05)
• Designed for 4-stroke performance and wide application compatibility

If you have questions about fitment or whether this kit is right for your build, call us directly — we're happy to help. We offer on-site installation and customization services at both of our locations in 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, please contact us for shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov