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Radius ground and edge trimmed for uniform drum contact
the kit includes the 43mm cylinder bore and piston assembly needed to complete the swap
First oversize replacement piston ring for the the PCK1 P200 Polini kit
this assembly ensures consistent
making it easier for shorter riders to plant their feet firmly at stoplights
RDR Chrome Silicon Steel Alloy Valve Springs rolf Radius ground and edge trimmedRDR'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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US$ 2149.97
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