Wiseco 4069M07450 Forged Piston Kit Yamaha CR Oversize - XS1100 10.25 1 74.5mm 3mm

The Wiseco 4069M07450 is a forged high-performance piston kit engineered for the Yamaha XS1100, delivering a 3.00mm oversize bore of 74.5mm and a 10.25:1 compression ratio for enhanced power output over the stock configuration. Designed as part of Wiseco's 4-Stroke Forged Series (Kit K1196), this piston is a direct upgrade choice for engine rebuilds requiring cylinder boring or sleeving.

Key Features:

• Forged from high-silicon, low-expansion aluminum alloy for superior strength, reduced weight, improved heat transfer, and longer service life
• 74.5mm bore diameter — 3.00mm oversize over the XS1100's standard 71.5mm bore
• 10.25:1 compression ratio for increased horsepower and torque over stock
• Diamond-turned CNC finish guarantees precise sizing with no variation for a perfect cylinder fit
• Optimized piston skirt design for maximum engine efficiency and throttle response
• Engineered, forged, and machined in the USA at Wiseco's facility in Mentor, OH
• Compatible with all cylinder bore compositions

Kit Contents (2933XC):

• Forged piston
• Piston rings
• Wrist pin
• Circlips

Important Note: This is an oversize piston. Cylinder boring or re-sleeving to 74.5mm is required prior to installation. This product is not CARB legal and is not for sale in California.