Dirt Motorcycle Engine Parts

This VintCo piston kit is a replacement assembly for 1979-1981 Yamaha DT175 and MX175 models, intended for vintage 2-stroke engine rebuilds. Manufactured using modern materials and production methods for OEM-style fitment and performance, the kit includes the piston, rings, pin and clips. A wrist pin bearing is available separately, and additional size options are also available.Features Complete piston kit with piston, rings, pin and clips Suitable for vintage 2-stroke engine rebuilds Wrist pin bearing sold separately Additional size options available Specifications VintCo Part Number: PSY10-1.0 Piston size: 67.0 mm Oversize: +1.0 mm Measured diameter: 66.94 mm Clearance: 0.06 mm Construction: Forged piston Coating: MoS2 coated for break-in Country of manufacture: Germany Vehicle Fitments 1979 Yamaha DT175 1979 Yamaha MX175 1980 Yamaha DT175 1980 Yamaha MX175 1981 Yamaha DT175 1981 Yamaha MX175

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VintCo PSY10-00 is a standard-bore piston kit for 1979-1981 Yamaha DT175 and MX175 models. Intended for vintage 2-stroke engines, it is manufactured using modern materials and production methods to provide OEM-equivalent or better fitment and performance. The kit includes the piston, rings, pin and clips; a wrist pin bearing is available separately, and other size options are also available.Features Complete piston kit including piston, rings, pin and clips Suitable for vintage 2-stroke Yamaha DT175 and MX175 models Intended to provide OEM-equivalent or better fitment and performance Wrist pin bearing available separately Other size options available Specifications VintCo Part Number: PSY10-00 Bore size: 66.0 mm Size: Standard Piston diameter: 65.94 mm Clearance: 0.06 mm Construction: Forged piston Coating: MoS2 Country of manufacture: Germany Vehicle Fitments 1979 Yamaha DT175 1979 Yamaha MX175 1980 Yamaha DT175 1980 Yamaha MX175 1981 Yamaha DT175 1981 Yamaha MX175

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VintCo piston kit for 1979-1981 Yamaha DT175 and MX175 models, designed for vintage 2-stroke engines and supplied as a complete 66.5 mm 0.5 mm oversize kit with piston, rings, pin and clips. It is manufactured using modern materials and production methods for OEM-fit replacement use, with a wrist pin bearing available separately and additional size options also available. OEM part number reference information is used to confirm correct fitment.Features Complete piston kit including piston, rings, pin and clips Suitable for vintage Yamaha DT175 and MX175 2-stroke engines OEM-fit replacement use Wrist pin bearing sold separately Additional size options available Specifications VintCo Part Number: PSY10-0.5 Bore size: 66.5 mm Oversize: 0.5 mm Piston type: Forged Coating: MoS2 Country of manufacture: Germany Size/Clearance: 66.44 mm / 0.06 mm Vehicle Fitments 1979 Yamaha DT175 1979 Yamaha MX175 1980 Yamaha DT175 1980 Yamaha MX175 1981 Yamaha DT175 1981 Yamaha MX175

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This VintCo piston kit is designed for Yamaha YZ250 1980-1981 and IT250 1981 vintage 2-stroke models. It includes the piston, rings, pin and clips for replacement or rebuild work, and is produced using modern materials and manufacturing techniques for OEM-equivalent fitment and performance. The piston is forged, MoS2 coated for running-in, and manufactured in Germany. A wrist pin bearing is available separately, and additional size options are also available.Features Complete piston kit with piston, rings, pin and clips Suitable for vintage 2-stroke engine replacement or rebuild work MoS2 coating to assist during running-in Wrist pin bearing available separately Additional size options available OEM part number provided to confirm correct fitment Specifications VintCo Part Number: PSY09-2.0 Piston diameter: 72.0 mm Oversize: +2.0 mm Piston size: 71.94 mm Clearance: 0.06 mm Piston construction: Forged Manufactured in Germany Cross-Reference OEM Part Numbers3R4-11636-00-00Vehicle Fitments 1980 Yamaha YZ250 1981 Yamaha YZ250 1981 Yamaha IT250

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VintCo PSY09-1.5 is a piston kit for Yamaha YZ250 1980-1981 and Yamaha IT250 1981 vintage 2-stroke models. It includes the piston, rings, pin and clips, with the wrist pin bearing sold separately. The piston is manufactured using modern materials and manufacturing techniques and is stated to provide OEM or better fitment and performance. Additional size options are also available.Features Complete piston kit with piston, rings, pin and clips Suitable for vintage 2-stroke Yamaha applications Wrist pin bearing sold separately Manufactured using modern materials and manufacturing techniques Stated to provide OEM or better fitment and performance MoS2-coated for break-in Manufactured in Germany Additional size options available Specifications VintCo Part Number: PSY09-1.5 Piston diameter: 71.5 mm Oversize: 1.5 mm over Forged piston Size as additionally stated in the source description: 71 mm (+1 mm over) Clearance figure: 71.44 mm Clearance: 0.06 mm Cross-Reference OEM Part Numbers3R4-11636-00-00Vehicle Fitments 1980 Yamaha YZ250 1981 Yamaha YZ250 1981 Yamaha IT250

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This VintCo piston kit is a forged replacement piston assembly for Yamaha YZ250 1980-1981 and IT250 1981 models, sized at 71.0 mm and 1.0 mm oversize. Designed for vintage 2-stroke engine rebuilds, it includes the piston, rings, pin and clips, and is manufactured in Germany using modern materials and production methods for OEM-style fit and performance.Features Complete piston kit includes piston, rings, pin and clips Suitable for vintage 2-stroke engine rebuilds and replacement work Forged piston construction MoS2 coated for break-in Wrist pin bearing sold separately OEM part number reference provided to confirm correct fit Additional size options are available separately Specifications VintCo Part Number: PSY09-1.0 Piston size: 71.0 mm Oversize: +1.0 mm Measured size: 70.94 mm Clearance: 0.06 mm Country of manufacture: Germany Cross-Reference OEM Part Numbers3R4-11636-00-00Vehicle Fitments 1980 Yamaha YZ250 1981 Yamaha YZ250 1981 Yamaha IT250

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VintCo PSY09-00 is a standard-bore 70.0 mm piston kit for Yamaha YZ250 models from 1980-1981 and the 1981 Yamaha IT250. Intended for vintage 2-stroke engine rebuilds, this kit includes the piston, rings, pin and clips, and is manufactured using modern materials and production methods for OEM-style fitment and performance.Features Complete piston kit including piston, rings, pin and clips Suitable for standard bore applications Intended for vintage 2-stroke engine rebuilds Wrist pin bearing available separately Manufactured in Germany Specifications VintCo Part Number: PSY09-00 Bore Size: 70.0 mm Size: Standard Piston Type: Forged Coating: MoS2 break-in coating Piston Diameter: 69.94 mm Clearance: 0.06 mm Cross-Reference OEM Part Numbers3R4-11636-00-00Vehicle Fitments 1980 Yamaha YZ250 1981 Yamaha YZ250 1981 Yamaha IT250

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This VintCo piston kit is a replacement assembly for Yamaha YZ250 1980-1981 and IT250 1981 models, intended for vintage 2-stroke engine rebuilds. Manufactured using modern materials and production methods, it is designed to provide OEM-equivalent fitment and performance. The kit includes the piston, rings, pin and clips, with a wrist pin bearing available separately, and is supplied in a 70.5 mm size with +0.5 mm oversize.Features Complete piston kit with piston, rings, pin and clips Suitable for vintage Yamaha 2-stroke engine rebuilds Designed for OEM-equivalent fitment and performance Wrist pin bearing sold separately Supports running-in Additional size options are available Specifications VintCo Part Number: PSY09-0.5 Piston diameter: 70.5 mm Oversize: +0.5 mm Piston measurement: 70.44 mm Clearance: 0.06 mm Construction: Forged piston Coating: MOS2 Country of manufacture: Germany Cross-Reference OEM Part Numbers3R4-11636-00-00Vehicle Fitments 1980 Yamaha YZ250 1981 Yamaha YZ250 1981 Yamaha IT250

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VintCo PSY08-2.0 is a piston kit for 1976-1981 Yamaha YZ175 and IT175 models, intended for vintage 2-stroke engine rebuilds. It includes the piston, rings, pin and clips, and is manufactured using modern production methods for OEM-equivalent fit and performance. The kit is supplied as a +2.0 mm oversize option, with other size options available separately. A wrist pin bearing is available separately.Features Complete piston kit with piston, rings, pin and clips Suitable for vintage 2-stroke engine rebuilds Designed for OEM-equivalent fit and performance Coated to assist running-in Wrist pin bearing sold separately Other size options available separately Specifications VintCo Part Number: PSY08-2.0 Product type: Piston kit Nominal size: 68.0 mm Oversize: +2.0 mm Piston diameter: 67.94 mm Clearance: 0.06 mm Construction: Forged Coating: MOS2 Country of manufacture: Germany Vehicle Fitments 1976 Yamaha YZ175 1976 Yamaha IT175 1977 Yamaha IT175 1977 Yamaha YZ175 1978 Yamaha IT175 1978 Yamaha YZ175 1979 Yamaha IT175 1979 Yamaha YZ175 1980 Yamaha IT175 1980 Yamaha YZ175 1981 Yamaha IT175 1981 Yamaha YZ175

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This VintCo piston kit is designed for 1976-1981 Yamaha YZ175 and IT175 models and is intended for vintage 2-stroke engine rebuilds. Manufactured using modern materials and production methods for OEM-equivalent or better fitment and performance, the kit includes the piston, rings, pin and clips. It is a forged piston made in Germany with a MoS2 coating to assist with break-in, while the wrist pin bearing is available separately and additional size options are also available.Features Complete piston kit including piston, rings, pin and clips Suitable for vintage 2-stroke engine rebuilds Forged piston MoS2 coated for break-in Wrist pin bearing sold separately Additional size options available Specifications VintCo Part Number: PSY08-1.5 Nominal piston size: 67.5 mm Oversize: +1.5 mm Piston measurement: 67.44 mm Clearance: 0.06 mm Country of manufacture: Germany Vehicle Fitments 1976 Yamaha YZ175 1976 Yamaha IT175 1977 Yamaha IT175 1977 Yamaha YZ175 1978 Yamaha IT175 1978 Yamaha YZ175 1979 Yamaha IT175 1979 Yamaha YZ175 1980 Yamaha IT175 1980 Yamaha YZ175 1981 Yamaha IT175 1981 Yamaha YZ175

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VintCo piston kit PSY08-1.0 is a 67.0 mm, +1.0 mm oversize replacement kit for 1976-1981 Yamaha YZ175 and IT175 models. Intended for vintage 2-stroke engine service, it includes the piston, rings, pin and clips, and is manufactured using modern materials and production techniques for OEM-equivalent fitment and performance. A wrist pin bearing is available separately.Features Complete piston kit for vintage Yamaha YZ175 and IT175 models Includes piston, rings, pin and clips Suitable for top-end rebuild and replacement work Designed for OEM-equivalent fitment and performance Wrist pin bearing sold separately Specifications VintCo Part Number: PSY08-1.0 Item category: Piston kit Piston size: 67.0 mm Oversize: +1.0 mm Piston diameter: 66.94 mm Clearance: 0.06 mm Piston construction: Forged Coating: MoS2 coated Country of manufacture: Germany Vehicle Fitments 1976 Yamaha YZ175 1976 Yamaha IT175 1977 Yamaha IT175 1977 Yamaha YZ175 1978 Yamaha IT175 1978 Yamaha YZ175 1979 Yamaha IT175 1979 Yamaha YZ175 1980 Yamaha IT175 1980 Yamaha YZ175 1981 Yamaha IT175 1981 Yamaha YZ175

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This VintCo piston kit is a standard-bore replacement assembly for 1976-1981 Yamaha YZ175 and IT175 two-stroke motorcycles. Intended for vintage engine rebuilds, it includes the piston, rings, pin and clips, and is manufactured using modern materials and production techniques for OEM-equivalent fit and performance. The piston is forged, made in Germany, and MoS2 coated to support initial running-in. A wrist pin bearing is available separately, and additional size options are also available.Features Complete piston kit with piston, rings, pin and clips Suitable for vintage Yamaha YZ175 and IT175 two-stroke engine rebuilds OEM-equivalent fit and performance Supports initial running-in Wrist pin bearing sold separately Additional size options available OEM part number cross-reference can be used to confirm exact fitment Specifications VintCo Part Number: PSY08-00 Product type: Piston kit Size: Standard bore Bore size: 66.0 mm Piston diameter: 65.94 mm Clearance: 0.06 mm Construction: Forged piston Coating: MoS2 Country of manufacture: Germany Vehicle Fitments 1976 Yamaha YZ175 1976 Yamaha IT175 1977 Yamaha IT175 1977 Yamaha YZ175 1978 Yamaha IT175 1978 Yamaha YZ175 1979 Yamaha IT175 1979 Yamaha YZ175 1980 Yamaha IT175 1980 Yamaha YZ175 1981 Yamaha IT175 1981 Yamaha YZ175

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This VintCo piston kit is designed for 1976-1981 Yamaha YZ175 and IT175 models and provides a 66.5 mm, +0.5 mm oversize replacement for vintage 2-stroke engines. Manufactured in Germany using modern materials and manufacturing techniques, it is intended to provide OEM-style fitment and performance. The kit includes the piston, rings, pin and clips, while a wrist pin bearing is available separately. Additional size options are also available.Features Complete piston replacement kit Includes piston, rings, pin and clips Intended for OEM-style fitment and performance Coated to assist running-in Wrist pin bearing sold separately Additional size options available Specifications VintCo Part Number: PSY08-0.5 Piston diameter: 66.5 mm Oversize: +0.5 mm Measured size: 66.44 mm Clearance: 0.06 mm Construction: Forged piston Coating: MoS2 Country of manufacture: Germany Vehicle Fitments 1976 Yamaha YZ175 1976 Yamaha IT175 1977 Yamaha IT175 1977 Yamaha YZ175 1978 Yamaha IT175 1978 Yamaha YZ175 1979 Yamaha IT175 1979 Yamaha YZ175 1980 Yamaha IT175 1980 Yamaha YZ175 1981 Yamaha IT175 1981 Yamaha YZ175

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This VintCo piston kit is designed for Yamaha DT125 models from 1974 to 1981 and suits vintage 2-stroke engine rebuilds. Supplied in 57.5 mm size with +1.5 mm oversize, the kit includes the piston, rings, pin and clips. It is manufactured using modern production methods for correct fit and performance, with OEM part number cross-reference intended to support exact fitment confirmation.Features Complete piston kit with piston, rings, pin and clips Suitable for vintage Yamaha DT125 2-stroke applications MoS2-coated to assist running-in Wrist pin bearing available separately Additional size options available Specifications VintCo Part Number: PSY07-1.5 Piston type: Forged Country of manufacture: Germany Size: 57.5 mm Oversize: +1.5 mm Piston measurement: 57.44 mm Clearance: 0.06 mm Vehicle Fitments 1974 Yamaha DT125 1975 Yamaha DT125 1976 Yamaha DT125 1977 Yamaha DT125 1978 Yamaha DT125 1979 Yamaha DT125 1980 Yamaha DT125 1981 Yamaha DT125

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This VintCo piston kit is for Yamaha DT125 models from 1974 to 1981 and is intended for vintage two-stroke engine service. It includes the piston, rings, pin and clips, and uses modern materials and manufacturing techniques to provide OEM-level fitment and performance. The kit is supplied in a 57.0 mm size with 1.0 mm oversize; a wrist pin bearing is available separately, and additional size options are also available.Features Complete piston kit with piston, rings, pin and clips Intended for vintage Yamaha DT125 two-stroke applications Designed for OEM-level fitment and performance Coated to aid running-in Wrist pin bearing sold separately Additional size options available Specifications VintCo Part Number: PSY07-1.0 Product type: Piston kit Piston diameter: 57.0 mm Oversize: 1.0 mm Piston size: 56.94 mm Clearance: 0.06 mm Construction: Forged Coating: MoS2 Country of manufacture: Germany Vehicle Fitments 1974 Yamaha DT125 1975 Yamaha DT125 1976 Yamaha DT125 1977 Yamaha DT125 1978 Yamaha DT125 1979 Yamaha DT125 1980 Yamaha DT125 1981 Yamaha DT125

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This VintCo piston kit is designed for Yamaha DT125 models from 1974 to 1981 and suits the standard 56.0 mm bore. Intended for vintage 2-stroke engine rebuilds, the kit includes the piston, rings, pin and clips, and is produced using modern materials and manufacturing methods for OEM-equivalent fitment and performance. A wrist pin bearing is available separately, and additional size options are also available.Features Complete piston kit including piston, rings, pin and clips Suitable for standard-bore engine rebuilds Wrist pin bearing sold separately Additional size options available Intended for vintage 2-stroke Yamaha DT125 models Specifications VintCo Part Number: PSY07-00 Bore size: 56.0 mm Size: Standard Piston diameter: 55.94 mm Clearance: 0.06 mm Forged piston construction MoS2 coated for break-in Made in Germany Vehicle Fitments 1974 Yamaha DT125 1975 Yamaha DT125 1976 Yamaha DT125 1977 Yamaha DT125 1978 Yamaha DT125 1979 Yamaha DT125 1980 Yamaha DT125 1981 Yamaha DT125

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This VintCo piston kit is designed for Yamaha DT125 models from 1974 to 1981 and suits vintage 2-stroke engine rebuilds requiring a 56.5 mm piston in 0.5 mm oversize. It includes the piston, rings, pin and clips, and is manufactured using modern materials and production methods for OEM-comparable fitment and performance. The piston is forged, made in Germany and MoS2 coated for running-in. A wrist pin bearing is available separately, and additional size options are also available.Features Complete piston kit with piston, rings, pin and clips Suitable for vintage 2-stroke engine rebuilds Wrist pin bearing sold separately MoS2 coating supports running-in Additional size options available Specifications VintCo Part Number: PSY07-0.5 Piston size: 56.5 mm Oversize: +0.5 mm Piston measurement: 56.44 mm Clearance: 0.06 mm Forged piston Made in Germany Vehicle Fitments 1974 Yamaha DT125 1975 Yamaha DT125 1976 Yamaha DT125 1977 Yamaha DT125 1978 Yamaha DT125 1979 Yamaha DT125 1980 Yamaha DT125 1981 Yamaha DT125

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This VintCo piston kit is designed for 1980-1981 Yamaha YZ465 models and provides a 1.5 mm oversize replacement for vintage 2-stroke engine rebuilds. Manufactured using modern materials and production methods for OEM-equivalent fitment and performance, the kit includes the piston, rings, pin and clips for a complete piston replacement. A wrist pin bearing is available separately.Features Complete piston kit for vintage 2-stroke rebuilds Includes piston, rings, pin and clips Intended to help simplify piston replacement Wrist pin bearing sold separately Additional size options available Coated to aid running-in Specifications VintCo Part Number: PSY06-1.5 Application: Yamaha YZ465 Nominal size: 86.5 mm Oversize: +1.5 mm Piston size: 86.42 mm Clearance: 0.08 mm Forged piston MoS2 coated Made in Germany Vehicle Fitments 1980 Yamaha YZ465 1981 Yamaha YZ465

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This VintCo piston kit is designed for 1980-1981 Yamaha YZ465 models and is intended for vintage 2-stroke engine rebuilds using a 1.0 mm oversize piston. Manufactured with modern materials and production techniques for OEM-equivalent or better fit and performance, the kit includes the piston, rings, pin and clips for a complete replacement assembly. It is a forged piston made in Germany and finished with a MoS2 coating to assist running-in.Features Complete piston kit for vintage 2-stroke Yamaha YZ465 applications Includes piston, rings, pin and clips Intended to help restore engine serviceability Wrist pin bearing available separately Additional size options available MoS2-coated to assist break-in Specifications VintCo Part Number: PSY06-1.0 Piston diameter: 86.0 mm Oversize: +1.0 mm Measured size: 85.92 mm Clearance: 0.08 mm Forged piston construction Country of manufacture: Germany Cross-Reference OEM Part Numbers 4V4-11638-00-00 3R5-11638-00-00 Vehicle Fitments 1980 Yamaha YZ465 1981 Yamaha YZ465

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VintCo PSY06-00 is a piston kit for 1980–1981 Yamaha YZ465 models, intended for vintage 2-stroke engine rebuilds and maintenance. This standard-bore 85.0 mm kit includes the piston, rings, pin and clips, and is manufactured using modern materials and production methods for OEM-equivalent fitment and performance. The piston is forged, made in Germany and MoS2 coated for break-in. A wrist pin bearing is available separately, and other size options are also available.Features Complete piston kit with piston, rings, pin and clips Suitable for vintage 2-stroke engine rebuilds Intended for OEM-equivalent fitment and performance MoS2 coated for break-in Wrist pin bearing sold separately Other size options available Specifications VintCo Part Number: PSY06-00 Item Category: Piston Kits Nominal bore size: 85.0 mm Size: Standard Piston diameter: 84.92 mm Clearance: 0.08 mm Piston type: Forged Country of manufacture: Germany Cross-Reference OEM Part Numbers 4V4-11631-00-93 3R5-11631-00-94 Vehicle Fitments 1980 Yamaha YZ465 1981 Yamaha YZ465

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VintCo piston kit PSY06-0.5 is a replacement forged piston assembly for 1980-1981 Yamaha YZ465 models. Intended for vintage 2-stroke engine rebuilds, it is manufactured using modern materials and production methods for OEM-style fit and performance. This kit is supplied with the piston, rings, pin and clips, and uses a MoS2 coating to support running-in; a wrist pin bearing is available separately.Features Suitable for vintage 2-stroke engine rebuilds Complete piston kit including piston, rings, pin and clips Wrist pin bearing sold separately Additional size options available Specifications VintCo Part Number: PSY06-0.5 Piston size: 85.5 mm Oversize: +0.5 mm Piston measurement: 85.42 mm Clearance: 0.08 mm Construction: Forged piston Coating: MoS2 Country of manufacture: Germany Cross-Reference OEM Part Numbers 4V4-11636-00-00 3R5-11636-00-00 Vehicle Fitments 1980 Yamaha YZ465 1981 Yamaha YZ465

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