Upgrade the top end of your motorcycle with the Cylinder Works Big Bore Cylinder Kit, manufacturer part number 31001-K01. Designed with an 80.00 mm bore and 12.6:1 compression ratio, this complete kit is engineered for increased displacement and dependable performance while maintaining a stock-like appearance. The kit includes the cylinder, matched piston kit, and required top-end gaskets for a streamlined installation.
Nickel silicon carbide plating helps promote long cylinder life, consistent heat management, and durable bore performance. Cylinder Works matches the cylinder with a Vertex piston to support longevity, strong engine performance, and reduced operating noise. The standard-style exterior allows the cylinder to blend with the original engine design, while the included components help eliminate the need to source separate piston and gasket parts.
Feature: Complete big bore kit with cylinder, piston kit, and gaskets. Feature: 80.00 mm bore with a 12.6:1 compression ratio. Feature: Nickel silicon carbide plated cylinder for extended service life. Feature: Matched Vertex piston supports performance, durability, and reduced engine noise. Feature: Stock-like cylinder appearance. Feature: Designed for installation without machine work when used as specified. Feature: Replacement pistons, gaskets, and ring sets are available separately. The top-end gasket kit does not include valve stem seals.
This Cylinder Works kit fits 2004 through 2008 Kawasaki KX250F models and 2004 through 2006 Suzuki RM-Z250 models. Verify engine specifications, compression requirements, and year-specific fitment before installation. Manufacturer part number: 31001-K01. Vendor part number: 422-31001K.
Features:
- Complete big bore kit includes the cylinder, piston kit, and gaskets
- 80.00 mm bore with a 12.6:1 compression ratio
- Nickel silicon carbide plated cylinder promotes long service life
- Matched Vertex piston supports durability, performance, and reduced engine noise
- Stock-like cylinder appearance
- Designed for installation without machine work when properly specified
- Replacement piston, gasket, and ring sets are available
- Top-end gasket kit does not include valve stem seals
- Fits 2004-2008 Kawasaki KX250F and 2004-2006 Suzuki RM-Z250 models
Fitment:
2004 Kawasaki KX250F
2004 Suzuki RM-Z250
2005 Kawasaki KX250F
2005 Suzuki RM-Z250
2006 Kawasaki KX250F
2006 Suzuki RM-Z250
2007 Kawasaki KX250F
2008 Kawasaki KX250F