Vespa PX125 150 Sprint V 150 GT Polini Straight Cut Primary Gear Gearbox 23/64T Frame Toolboxes VESPA ET4 125 1996>2000

VESPA ET4 125 1996>2000

more often than not

RUNNER FX 125 - SP 125

piston ring etc

Vespa PX125 150 Sprint V 150 GT Polini Straight Cut Primary Gear Gearbox 23/64T Frame Toolboxes VESPA ET4 125 1996>2000Vespa PX125 150 Sprint V 150 GT Polini Straight Cut Primary Gear Gearbox 23 64T Primary drive gears can rise or lower the final drive ratio of your VESPA motors gearbox. A higher drive ratio becomes necessary when increasing the cubic capacity of your PX80 150 motor with performance enhancing cylinder kits with a cubic capacity of between 166 and 177cc. A performance enhanced 200cc VESPA motor with a tuning cylinder or at least an expansion chamber