Camshaft; CSC go., 139QMB Scooters large frame Vespa * Aprilia SR 50 1997-2001

* Aprilia SR 50 1997-2001 aircooled (Minarelli engine) with rear drum brake

Airbox side OD: 35mm

This metal hook attaches to the front bolt mount underneath your scooter's seat

Roller weights are not included

Has slightly less displacement than the other kits in its class

Camshaft; CSC go., 139QMB Scooters large frame Vespa * Aprilia SR 50 1997-2001This OEM style camshaft replaces stock equipment on CSC go scooters, Genuine Bella Classic 50, Nitro Sport 50 and Pug 50 scooters, and bikes with 139QMB engines. Original Parts For Scooters SKU 151 104 Specifications: Number of Teeth: 34 Intake Lobe (widest point): 25. 7mm Exhaust Lobe (widest point): 25. 5mm Compatibility: CSC go Genuine Bella Classic 50 Genuine Nitro Sport 50 Genuine Pug 50 139QMB based 50cc 80cc engines with the following engine