Vespa PK50 S XL FL Racing Crankshaft Mazzucchelli 43mm Stroke 87mm Conrod 20mm Cone Flywheels Comfortable tire construction

Comfortable tire construction

this gives the V4 head buyer the opportunity to fit the head with a the new piston or they can if they wish machine their existing piston to accommodate the larger valves

5mm - For perfect fit)

Idle gear size 22mm

Vespa PK50 S XL FL Racing Crankshaft Mazzucchelli 43mm Stroke 87mm Conrod 20mm Cone Flywheels Comfortable tire constructionVespa PK50 S XL FL Rush Racing Crankshaft Mazzucchelli 43mm Stroke 87mm Conrod 20mm Cone disc valve stroke 43,0mm conrod 87,0mm cone 20 20mm, M12 PK50XL uses the 6204 Primavera PKs flywheel side bearing the PK125XL uses the PX flywheel side bearing. Same as Original Part No. 224587