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The compression spring controls two critical CVT functions: it supplies the pressure needed to engage the drive belt
consider the NCY 1000 RPM or 1500 RPM springs
Bottom eye hole ID: 8mm
Approval: DOT Approved
Mechanic's Note: This is a racing-grade spring
Crankshaft (Full Circle); Vespa P/PX vespa vsx The compression spring controls twoHigh quality item made in Italy, this full circle crank for 125 150 cc P PX and late model Sprint, Sprint Veloce, and Super model Vespa scooters. Full circle crankshafts increase crank case compression and low end power. The 360 degree webs generate greater stability and longer life over cut back cranks. NOTE: This crankshaft is for use on reed valve inducted engines only. To install in a rotary inducted engine, the rotary pad must be completely
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