Description
A9 High-Lift Camshaft for GY6 50cc Engines
The A9 High-Lift Performance Camshaft is designed for GY6 50cc (139QMB) scooters. This part is engineered to improve your engine’s power delivery, particularly at higher RPMs. It is one of the GY6 50cc scooter parts that significantly boosts performance in the mid-range and increases maximum speed. Perfect for those upgrading to big bore kits ranging from 72cc to 100cc, this camshaft allows for better airflow and efficiency.
Aggressive Lift Profile for Increased Power Output
This camshaft features a highly aggressive lift profile that surpasses stock specifications, making it a top choice for performance enthusiasts. The pre-installed low-friction bearings ensure smooth operation, while the hardened steel alloy construction minimizes wear over time. These features combine to provide reliable operation under demanding conditions.
Installation and Compatibility
The A9 camshaft is a direct replacement for the factory 139QMB camshaft, requiring no machining of the cylinder head for standard installations. It fits a wide range of 4-stroke 50cc Chinese scooters, making it a versatile option for riders looking to upgrade their engines.
Specifications
- Material: Hardened steel alloy
- Intake Lobe: 26.50mm (±0.05mm)
- Exhaust Lobe: 26.35mm (±0.05mm)
- Bearings: Pre-installed 16002/P6 rated ball bearings
- Certification: ISO 9001
- Includes: Complete camshaft with pre-installed bearings
Fitment
This camshaft is compatible with the following engine codes:
- 139QMA
- 139QMB
- 1P39QMB
- 1P39QMA-2
- YN139QMB
- JJ1P39QMB
- 139FMA-2
- BD1P39QMB
- BN139QMB
- 147QMD
Not sure it fits? Contact us with your scooter's make, model and year and we'll confirm the fit before you order.
Shop more: GY6 50cc Scooter Parts (139QMB) · GY6 Scooter Parts · Scooter Cylinder Heads & Valves · Scooter Parts
Customer Reviews
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.