CYLINDER SLEEVE 80-80 YAMAHA YZ 125 56mm VINTCO SLY01B
VintCo SLY01B is a replacement cast iron cylinder sleeve designed for vintage Yamaha YZ125 engines. Manufactured in the USA for VintCo by Advanced Sleeve, this sleeve is intended for machines where a replacement cylinder is difficult to source. It features correctly angled ports to reduce port-matching work and can be bored and honed to suit a stock-size VintCo piston kit. The sleeve is designed for OEM-equivalent or better fitment and performance. Specifications include a bore of 56 mm, height of 106.7 mm, outside diameter of 62.1 mm, flange outside diameter of 64.8 mm, flange height of 5.1 mm, wall thickness of 3.5 mm, intake of 32.5 mm, and exhaust port location of 25.7 mm. The VintCo part number is SLY01B and it is compatible with piston part number PSY01-00.
- SKU
- VIN-SLY01B
- Brand
- Vintco
- Availability
- In Stock (1)
FULL DESCRIPTION
VintCo Replacement Cylinder Sleeve for Vintage Yamaha YZ 125
Restore your vintage Yamaha YZ 125 with this high-quality replacement cylinder sleeve from VintCo. Manufactured in the USA by Advanced Sleeve for VintCo, this cast iron sleeve is specifically designed for classic motorcycles where original replacement cylinders are hard to find. Engineered for OEM-equivalent or superior fitment and performance, it utilizes modern materials and manufacturing techniques to ensure durability and reliability.
This cylinder sleeve is designed to minimize installation complexity. It features precisely angled ports, reducing the need for extensive port-matching work by your machinist. The sleeve can be accurately bored and honed to accommodate a stock-size VintCo piston kit, ensuring a perfect fit and optimal power delivery.
Key Features:
- Direct replacement cylinder sleeve for vintage Yamaha YZ 125 engines.
- Ideal for classic restorations where original parts are scarce.
- Manufactured in the USA by Advanced Sleeve for VintCo.
- Cast iron construction for durability.
- Designed for OEM-level or better fitment and performance.
- Features pre-angled ports to simplify port-matching.
- Can be bored and honed for stock-size VintCo pistons.
- Requires installation by an experienced, qualified machinist.
Specifications:
- Brand: VintCo
- Part Number: SLY01B
- Product Type: Cylinder Sleeve
- Material: Cast Iron
- Bore: 56 mm
- Height: 106.7 mm
- Outside Diameter: 62.1 mm
- Flange Outside Diameter: 64.8 mm
- Flange Height: 5.1 mm
- Wall Thickness: 3.5 mm
- Intake Port Dimension: 32.5 mm
- Exhaust Port Location: 25.7 mm