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Fitment: GY6 50cc engines also known as QMB Engines with the following codes: 139QMA
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most 150cc scooters XXL / XXXL Up to 64" Maxi scooters 250cc+
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Original ZNEN Part Number: 22100-SQ5A-9000
RDR Chrome Silicon Steel Alloy Valve Springs tall Fitment: GY6 50cc engines alsoRDR'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
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