RDR Chrome Silicon Steel Alloy Valve Springs
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RDR's Chrome Silicon Steel Alloy Valve Springs for 139QMB 50cc 4-stroke and 125/150cc GY6 and GY6B 4-stroke engines are rated for 12,000 RPM. The lighter your valve train components, the quicker the engine revs.
Specifications:
- Includes 2 Inner and 2 Outer Valve Springs
- Outer Spring Weight: 14g
- Inner Spring Weight: 7g
- Coil Diameter Outer Spring: 2.54mm
- Coil Diameter Inner Spring: 1.95mm
- Outer Spring Height: 37.3mm
- Inner Spring Height: 27.3mm
Compatibility: 139QMB 50cc 4-stroke and 125/150cc GY6 and GY6B 4-stroke engines
139QMB-based 50cc / 80cc engines with the following engine codes:
| 139QMA | 139QMB | 1P39QMB | 1P39QMA-2 |
| YN139QMB | JJ1P39QMB | 139FMA-2 | BD1P39QMB |
| BN139QMB | 147QMD | Other QMA models | Other QMB models |
157QMJ-based 125cc / 150cc / 169cc engines with the following engine codes:
| 157QMJ | 161QMK | 152QMI | 1P61QMK |
| YN1P57QMJ | 1P52FMI | 154FMI | JJ157QMJ |
| 1P57QMJ | BN157QMJ | BN161QMK-A | Other QMJ, QMK, and QMI models |
Don't see your engine listed? If the engine code includes "QM" or "FM" and your bike is a 4T, this product is compatible with your vehicle.
About RDR: RDR is a Taiwanese manufacturer who specializes in performance and styling parts for scooters and motorcycles.
This product is not intended for use on public roads or land.
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