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.
Model Fitment
Brands: Amstar, Amigo, Ascend, Baotian, Bashan, Blade, Boom, Chicago Scooter Company, Dongfang, Roketa, Baotian, Bashan, BMS, Cool Sports, E Ton, Fly Wing, Eagle, Fly, Italica, Riya, Ice Bear, Jackel, Jet Moto, JCL, Taotao, Peace, JM Star, Jonway, Kazuma, Keeway, KMD, Kymco, Lance, Lifan, Linhai, Loncin, Longbo, Fuxin, Jiajue, Tao Tao, Tao Motors, Trailmaster, Maxtrade, Meitien, Motofino, Motorino, NST, Panterra, Panther, Qlink, Yiben, Red Streak, Redcat, Roketa, Schwinn, Strada, SYM, Tank, Terminator ,Tomberlin, TNG, United Motors, Vento, Vitacci, Wildfire, Wolf, X-Treme, X-Pro, Yongfu, ZNEN, Zhongneng , Zhilong, Geely, Wangye, ZH and more Manufactured by: Taizhou Zhongneng Motorcycle Co.; Jiangsu Zhongneng Motorcycle Co.; Jiangsu Meijunte Technology Co.; Taizhou Qianxin Vehicle Co.; Ningbo Dongfang Lingyun Vehicle Made Co.; Taizhou Zhilong Technology Co.; Zhejiang Jiajue Motorcycle Manufacturing Co.; Zhejiang Gelly Ming Industrial Co.; Taizhou City Senglong Motorcycle Manufacture Co.; Jiangsu Sacin Motorcycle Co.; Jiangsu Linhai Power Machinery Group Co.; Zheijiang TaoTao Vehicles Co.; Zhejiang Senling Motorcycle Co.; Sanmen County Yongfu Machine Co; Taizhou Jiaojiang Zhiwei Motorcycle Manufacture Co.; Huzhou Daixi Zhenhua Technology Trade Co.; Taizhou Zhongneng Motorcycle Co.; Zhejiang Riya Motorcycle Co.; Ningbo Longjia Motorcycle Co.; Taizhou Zhongneng Motorcycle Co.; and more
