Wossner forged piston kit with a 66.50mm bore, designed for Yamaha YZ175 and IT175 models from 1976 to 1981. Engineered for strength and durability, this piston enhances combustion chamber heat transfer and features an elliptical design to ensure even load distribution, reducing localized pressure and preventing collapse. Manufactured in Germany for high performance and reliability.

Features

• Oversized forged piston (+0.50mm) for increased durability


• Elliptical design for even thrust load distribution


• Optimized heat transfer to cylinder walls


• Manufactured in Germany for superior quality

Specifications

• Bore Size: 66.50mm


• Standard Bore: 66.44mm


• Displacement: 172 cm³


• Stroke: 50.00mm


• Clearance: 0.06mm


• Compression Ratio: 2-Stroke


• Compression Height: 30.00mm

Cross-Reference OEM Part Numbers

• Piston Part Number: 8177D050


• Lock Part Number: CW16


• Pin Part Number: WP027


• Ring Set Part Number: RSB6650 x 2

Vehicle Fitments

• Yamaha YZ175 1976-1981


• Yamaha IT175 1976-1981