Vespa PX125 150 Sprint V 150 GT Polini Straight Cut Primary Gear Gearbox 23/64T Frame Toolboxes offering significant power improvements

offering significant power improvements

Instead of the cylinder head or ambient temperature the Air Fuel Ratio (AFR) will be displayed

more often than not

This increases the displacement to a whopping 187ccm and the power determining timing angles of the channels are increased

VESPA ET4 125 1996>2000

Vespa PX125 150 Sprint V 150 GT Polini Straight Cut Primary Gear Gearbox 23/64T Frame Toolboxes offering significant power improvementsVespa 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