Description
+8.2mm Stroker Crank for GY6 B-Case Engines
This +8.2mm stroker crank is designed specifically for B-case GY6 engines and provides an increase in engine displacement when paired with the appropriate cylinder kit. With a total stroke of 66mm, it delivers an impressive 232cc when used with a 67mm cylinder. This part is one of the GY6 scooter parts that improves engine performance, making it a solid choice for those looking to boost their scooter's capabilities.
Performance Specifications
The stroker crank features a stroke measurement of 66mm, along with a piston pin hole diameter of 15mm. It includes main bearings for a complete installation and is well-suited for performance applications. Note that a spacer may be needed for compatibility with most cylinder kits.
Installation Requirements
This crankshaft is equipped with M12x1.25 thread sizes for both the flywheel and drive end, each having a thread length of 16mm. Proper installation is key for ensuring engine function, so make sure to follow all guidelines for fitting this part into your setup.
Specifications
- Stroke: 66mm (+8.2mm)
- Flywheel Thread Size: M12x1.25
- Flywheel Thread Length: 16mm
- Drive End Thread Size: M12x1.25
- Drive End Thread Length: 16mm
- Inner Diameter (Piston Pin Hole): 15mm
- Number of Splines: 19
Fitment
This stroker crank is compatible with GY6 QMI/QMJ 152/157 engines. Ensure your engine model matches to guarantee proper fit and function.
- GY6 QMI 152
- GY6 QMJ 157
Not sure it fits? Contact us with your scooter's make, model and year and we'll confirm the fit before you order.
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