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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