CYLINDER FULL KIT +5.60mm BIG BORE 72.00mm YAMAHA YZ 2T 250 1999 - 2025 CYLINDER WORKS 21009-K01
Cylinder Works Big Bore Cylinder Kit is a complete top-end rebuild solution, increasing displacement from 249cc to 295cc with a +5.6mm bore. This kit includes a nickel silicon carbide (NSC) electroplated cylinder for enhanced durability and reduced friction, along with a hand-matched Vertex big bore piston made from 2618 aluminum alloy for superior strength. Designed as a true bolt-on, this kit provides a noticeable power increase throughout the entire RPM range without requiring further engine modifications. Features include cylinder, cylinder head, power valve kit, piston kit, top-end gasket kit, and wrist pin bearing. Specifications: Cylinder Diameter 72 mm, Cylinder Kit Type Big Bore, Displacement 295 cc, Engine Type 2-Cycle, Compression Ratio Standard, Size Over Standard +5.60 mm, Uses Vertex Piston #24079B.
- SKU
- 56-K156.72.CKCW
- Brand
- Cylinder Works
- Availability
- In Stock (1)
FULL DESCRIPTION
Cylinder Works Big Bore Cylinder Kit - +5.60mm Overbore
Upgrade your Yamaha YZ 250 with the Cylinder Works Big Bore Cylinder Kit, a comprehensive top-end rebuild solution. This kit significantly increases displacement from 249cc to 295cc through a +5.6mm bore, resulting in a noticeable power increase across the entire RPM range. The kit features a high-quality nickel silicon carbide (NSC) electroplated cylinder designed for enhanced durability and reduced friction, ensuring long-lasting performance. It also includes a hand-matched Vertex big bore piston crafted from strong 2618 aluminum alloy.
Designed as a true bolt-on upgrade, this kit provides a substantial performance boost without requiring any additional engine modifications. It offers an OEM appearance at a more accessible price point.
Key Features:
- Complete top-end rebuild kit for big bore applications.
- Includes cylinder, cylinder head, power valve kit, piston kit, top-end gasket kit, and wrist pin bearing.
- Features a hand-matched Vertex big bore piston made from 2618 aluminum alloy for superior strength.
- Nickel silicon carbide (NSC) electroplated bore provides tighter tolerances and lower friction.
- Delivers increased power across the entire RPM range.
- Offers an OEM appearance at a lower cost.
- True bolt-on installation with no additional modifications required.
Specifications:
- Cylinder Diameter: 72 mm
- Cylinder Kit Type: Big Bore
- Displacement: 295 cc
- Engine Type: 2-Cycle
- Compression Ratio: Standard
- Size Over Standard: +5.60 mm
- Uses Vertex Piston #: 24079B