Primary Driven Gear 16 (16/69
-4.31) teeth, for 50-75cc
cylinder, OLYMPIA for Vespa
50 1°/3°/PK50/S/SS/XL 1°/FL/HP
Ø 28,9 mm, helical cut teeth,
for primary 14/69 and 15/69
Still up to date: The primary driven gear cog by PINASCO, 16 teeth, suitable for Vespa 50/PK50 XL/XL2/FL/HP/N/Rush. The gear is easy to mount and combined with a 77cc cylinder it promises an increase in speed of up to 10km/h. Thanks to the changed transmission the torque is lowered, which has a positive effect on your cylinder’s longevity.
Possible gear transmission rations of primary driven gear:
14 / 69 (4.93) Standart pitched cogs, Vespa 50 PK XL/XL2/FL/HP/N/Rush
15 / 69 (4.60) Standart pitched cogs, Vespa 50 ´76/´77, all PK50XL Elestart
16 / 69 (4.31) with Pinasco gear
SIP-TIP: Don’t forget to order gaskets for clutch cover/brake base plate and a securing plate primary drive gear.
OEM Numbers (for the purpose of comparison)