Wiseco K1229 Forged Piston Kit 77mm 10.25:1 CR +3mm Oversize 1229cc

The Wiseco K1229 is a complete forged top-end piston kit engineered for the Suzuki GS1150. Featuring a 77.0mm bore diameter, +3mm oversize, and a 10.25:1 compression ratio, this kit delivers a total displacement of 1229cc and is built to meet the demands of both high-performance riders and recreational enthusiasts. The 20mm wrist pin is included.

Key Features:

• Dedicated forging — Crafted from aerospace-grade aluminum using a forging process that compresses the material's molecules, increasing density and aligning grain flow for superior strength, reduced weight, and improved heat transfer
• CNC precision machined — Diamond-turned finish guarantees consistent sizing with no variation, ensuring proper installed clearance for maximum power, minimal wear, and optimal sealing at operating temperature
• Universal cylinder compatibility — Designed to work in cast iron, chrome, nikasil, and boron composite cylinder bore compositions
• +3mm oversize — Extends the service life of worn cylinders; chrome, nikasil, and boron composite cylinders can be resleeved to accept this oversize piston
• High-performance ring set and alloy pin — Premium components included for a complete, ready-to-install top-end rebuild
• Race-proven design — Trusted by top race teams across Supercross, Motocross, GNCC, Superbike, and more for over 75 years
• Made in the USA

Kit Includes:

• Piston set (4 pistons)
• Piston rings (Ring P/N: 3032XG)
• Wrist pins (20mm, Pin P/N: S520)
• Circlips (P/N: CW20)
• Complete top-end head and base gasket set

Specifications:

• Bore Size: 77.0mm
• Oversize: +3mm (Stock bore: 74mm x 65.95mm stroke)
• Compression Ratio: 10.25:1
• Total Displacement: 1229cc
• Wrist Pin Diameter: 20mm
• Ring Part Number: 3032XG
• Wrist Pin Part Number: S520
• Circlip Part Number: CW20
• UPC: 193564156273