Outer Drive Face | Vespa GTS 250/300 Piaggio BV/MP3

Stop letting a grooved, uneven, or glazed drive pulley degrade your scooter's performance. This premium aftermarket outer drive face (fixed half-pulley) works in perfect unison with your variator to deliver crisp, predictable acceleration and smooth gear-ratio transitions. Engineered to meet strict factory tolerances, it replaces worn-out plates that cause premature drive belt wear and sluggish top-end speed.

Key Features

• Restores Smooth Acceleration: Eliminates deep ridges and grooves worn into the pulley face by old drive belts, restoring seamless CVT shifting
• Integrated Turbine Cooling Fins: Precision-cast radial air-induction blades draw cool air through the transmission case to lower belt operating temperatures
• OEM-Spec Spline Machining: Perfectly matched center spline pattern locks tightly onto the crankshaft with zero slop or play
• Optimized Face Angle: Engineered to the precise factory angle for maximum belt contact — prevents slipping under heavy loads
• Replaces OEM: 840193, 831375, 1A013202

Technical Specifications

• Component Type: Variator Fixed Outer Drive Face (Half-Pulley)
• Material: Cast aluminum with ground friction face
• Cooling: Radial air-induction turbine blades
• OEM Cross-Reference: 840193, 831375, 1A013202
• Origin: Italy 

Compatibility

California Prop 65 Warning: www.p65warnings.ca.gov

• Restores smooth CVT acceleration — eliminates ridges and grooves worn into the pulley face by old drive belts
• Integrated turbine cooling fins — radial air-induction blades draw cool air through the transmission case
• OEM-spec spline machining — locks tightly onto the crankshaft with zero slop or play
• Optimized face angle for maximum belt contact — prevents slipping under heavy loads
• Replaces OEM part numbers 840193, 831375, 1A013202

Component: Variator Fixed Outer Drive Face (Half-Pulley) | Material: Cast Aluminum | Surface: Ground friction face | Cooling: Radial air-induction turbine blades | OEM Ref: 840193, 831375, 1A013202 | MPN: 100320270 | Origin: Italy | Vendor: RMS

Fits Vespa GTS 250, GTS 300, GTS Super, GTV 250, GTV 300 (Quasar 250–300cc & early HPE engines); Vespa GT 200 / Granturismo (200cc liquid-cooled Leader engine); Piaggio BV 250, BV 300; Piaggio MP3 250, MP3 300; Aprilia Atlantic 250, SportCity 250, SportCity 300 (all liquid-cooled Quasar configurations). Replaces OEM 840193, 831375, 1A013202.