The Universal Parts 61mm Cylinder Kit is a complete OEM-replacement cylinder assembly for GY6 161QMK 169cc engines — commonly marketed as "200cc" — found in Chinese-made buggies, ATVs, and scooters. This kit replaces the cylinder, piston, and all associated hardware in one package.
Important: These 161QMK engines use a wider stud spacing than standard GY6 125/150cc engines. Verify your stud spacing before ordering — There are several 161QMK Variants on the market.
What's Included
- Cylinder (61mm bore)
- Piston with pin, circlips, and rings
- Head gasket
- Base gasket
- Chain tensioner gasket
Features
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Correct Stud Spacing: 56mm square, 79mm diagonal — engineered specifically for 161QMK models, often from Vitacci, HHH, Tao Motor, Trailmaster, Coolster, and others.
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Complete Drop-In Kit: Everything needed for a full cylinder replacement in one box.
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OEM Quality Construction: Cast aluminum cylinder with iron sleeve for durability and heat dissipation is sourced directly from engine OEMs to ensure original quality and fit.
Specifications
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Cylinder Bore: 61mm
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Cylinder Stud Spacing (Diagonal): 79mm
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Cylinder Stud Spacing (Length): 56mm
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Cylinder Stud Spacing (Width): 56mm
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Overall Height: 88.75mm
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Cylinder Sleeve Outer Diameter: 64.25mm
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Wrist Pin Diameter: 15mm
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Wrist Pin Width: 49mm
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Engine Compatibility: GY6 161QMK 169cc with above dimensions
Model Fitment
| Engine Code |
Displacement |
Stud Spacing |
Application |
| 161QMK |
169cc ("200cc") |
56mm square / 79mm diagonal |
Buggies, ATVs, Scooters |
The major Chinese brands and distributors utilizing this cylinder specification for their 169cc / "200cc" scooters, ATVs, and buggies include:
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Vitacci: Clash 200 / Clash 200 EFI, Eagle 200, Tanker 200, Focus 200, Fighter 200, Hiker 200, Ranger 200, Striker 200, V-Max 200, V-Sharp 200, Bella 200, Best 200, Bingo 200, Crola 200, Fula 200 and Roket 200.
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HHH / Tank Sports: Tank 200 EFI / Tanker 200 scooters.
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Tao Motor / TaoTao: TaoTao Bull 200 ATV and select 200-series utility buggies using the wide-stud 169cc platform.
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TrailMaster: Select 200-series go-karts and light utility buggies using wide-stud 161QMK 169cc variants.
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BMS Powersports: Select 200cc utility scooters, go-karts and ATVs using this engine setup.
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SSR Motorsports & Coolster: Select 169cc/200cc pit bikes, ATVs and youth buggies built on the 161QMK case.
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Additional existing applications: with matching 161QMK 169cc cylinder specifications.
NOTE: Verify your stud spacing before ordering.
