GY6 49cc 50cc Crankshaft With 16 Teeth 139QMB 139QMA Roketa SUNL JCL Scooter Moped

Description

• 1.First, it converts motion efficientlyturning the pistons up-down reciprocating motion into rotational power for the wheels, ensuring smooth energy transfer.
• 2.Second, it maintains engine stability: its balanced design reduces vibration during high-speed operation, enhancing riding comfort and protecting other engine parts.
• 3.Third, it boasts high durability: made of robust materials like forged steel, it withstands high pressure and wear, extending the engines lifespan.
• 4.Fourth, it enables precise timing: working with camshafts, it ensures accurate valve and piston coordination, optimizing engine performance.
• 5.Finally, it supports power output: its structural design adapts to different engine types (e.g., single-cylinder, multi-cylinder), meeting varied power needs for commuting or racing.

Over Length: 247mm
Bearing size/model: 20 X 47 X 14 [6204]
Bearing size/model: 17 X 42 X 12 [6203]
Thread Size (tapered side): M10x1.25
Thread Size (spline side): M12x1.25
Stroke: 41.4mm
Item Weight : 1.95kg
Model Name : GY6
Engine Model : 139QMA 139QMB

Shipping and Returns

• We offer tracked shipping on all orders. Tracking information will be shared as soon as the order is dispatched.
• Please check the delivery estimate before adding a product to the cart. This is displayed for every product on the website.
• Available shipping methods and charges will be displayed at the time of checkout, depending on your exact location.
• All customers are entitled to a return window of 14 days, starting from the date of delivery of the product(s).
• Customers are advised to read our return policy for details of the return process, eligibility, refunds as well as cancellations or exchanges.
• In case of any issues or concerns about Shipping or Returns, please contact us and we will be happy to help.