Description
+3.0mm Stroker Crank for GY6 Engines
This +3.0mm stroker crank is designed specifically for GY6 engines, offering a total stroke of 60.8mm. It is compatible with both A-Case and B-Case configurations, making it a versatile option for improving engine performance. One of the GY6 scooter parts that can lead to increased displacement when paired with big bore cylinder kits, this crankshaft is an ideal choice for those looking to optimize their scooter's capabilities.
Performance and Displacement
When used with various big bore cylinder kits, this stroker crank provides significant displacement increases, boosting the overall performance of your engine. For example, combining it with a 58.5mm cylinder yields approximately 163cc, while a 67mm cylinder can produce up to 214cc. This allows for improved acceleration and power output, making it a worthwhile upgrade for performance enthusiasts.
Construction Details
The crankshaft features a total length of 285mm and is equipped with a flywheel thread size of M12x1.25, ensuring a secure connection. It also includes main bearings, which are important for smooth operation. The inner diameter of the piston pin hole measures 15mm, with 19 splines, providing a reliable fit within the engine assembly.
Specifications
- Overall Length: 285mm
- 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 specifically designed for GY6 engines, including:
- 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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