GY6 58.5mm Big Bore Kit - Forged Piston
ITEM# TT-15669
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Description
58.5mm Big Bore Kit for GY6 125cc and 150cc Engines
This 58.5mm big bore kit is built for GY6 4-stroke engines in the 125cc and 150cc range. A forged piston comes with the kit and raises displacement to 155cc. It is one of the GY6 scooter parts that can add performance without any crankcase work, and it can be fitted by someone with basic mechanical ability.
Kit Build
The piston in this kit is forged, a construction chosen for its durability and dependability. The cylinder stands 91.5mm tall and its outer sleeve measures 60.3mm across. The stud spacing is 76.5mm, so the kit is sized to sit correctly on compatible GY6 engines.
Fitting Notes
No crankcase modifications are needed with the 58.5mm Big Bore Kit. It bolts straight onto the engine, which makes it a practical choice for anyone wanting more power without a large amount of mechanical work.
Specifications
- Bore: 58.5mm
- Outer Sleeve Diameter: 60.3mm
- Displacement Increase: 155cc
- Overall Height (Cylinder): 91.5mm
- Stud Spacing: 76.5mm
- Fits: GY6 150cc and 125cc 4-stroke engines with 60.3mm outer sleeve diameter and 76.5mm stud spacing
Compatibility
Fits:
- GY6 QMI/QMJ 152/157 (150cc and 125cc 4-stroke engines)
- Various unlisted makes and models with GY6 engines
How to choose: Check your cylinder's outer sleeve diameter. It needs to be 60.3mm, and the stud spacing needs to be 76.5mm for the kit to bolt on.
Shop more: GY6 Scooter Parts · Chinese Scooter Parts · Scooter Big Bore & Cylinder Kits · Scooter Pistons & Piston Rings · Scooter Parts
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