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Ships within 48 hours · Estimated delivery Aug 27 - Sep 1
the kit includes the 43mm cylinder bore and piston assembly needed to complete the swap
Engine Compatibility: GY6 125/150cc (Long Case)
* MTC EVOLIS 50
making it easier for shorter riders to plant their feet firmly at stoplights
Straight Valve Stem - TR4
RDR Chrome Silicon Steel Alloy Valve Springs rolf the kit includes the 43mmRDR'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
