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Primary Driven Gear 67 teeth,

input shaft, FA for Vespa
125 GT/GTR/Super/TS/150 GL
/Sprint/V/Super/160 GS/180
SS/180 Rally/P125-150X 1°
/P150S 1°

The gear cog attached to the clutch together with the primary driven gear make up the primary gear ratio of the motor of your VESPA. The primary driven gear is solidly riveted to the rest of the input shaft assembly and is so in constant direct contact with the output shaft assembly. The primary gear ratio of your motor is determined by the amount of teeth on either the clutch gear cog or the primary driven gear cog. The more power available, the higher the gear ratio should be so that the extra performance can be more effectively realised as real top end speed.

The primary driven gear cogs with 67 and 68 teeth are compatible with clutch gear cogs that have 20, 21 or 22 teeth. The primary driven gear cog with 65 teeth is compatible with the clutch gear cogs with the 21, 22 and 23 teeth of the clutch basket model with an outer diameter of 115mm. In combination with different sized output shaft gear cogs your gearbox ratio can be exactly trimmed to the needs of your particular motor setup.

Conclusion: Changing the primary gear ratio of your motor affects the effective gear ratio of all your gears and should always be considered when extra available power needs to be turned into extra top end speed.


SIP-TIP: Do not forget to order a suitable primary drive repair kit and new gearbox oil!


SIP Community user ‚charly‘ on Art.-Nr. 11272000:  „Cool! Very good item.”

OEM Numbers (for the purpose of comparison)  077351 (PIAGGIO)

icon explos Spare Parts Catalogue
This article can be found in the following exploded drawings ... go Go to Exploded Drawings!
11171500 $23.62
88216000 $24.65
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350g / piece
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fits on the following articles
divider Productname divider Art. No. divider Price divider Stock
Countershaft 12-16-20-25 teeth, P/A with primary gear, 67 teeth for Vespa 125 GT 2° 88215500 $164.02
icon scootermodels This product fits the following models
divider Producer/Model divider cc divider Type divider Engine divider Yr. of Const. divider Extra
VESPA 125 (T2/125) (D) 125 VNB1-6 2T AC `59-`65 VNB5-6T
VESPA 125 GT / 125 Sprint 125 VNL1-2 2T AC `61-`73 VNL2T 30001 -> 76107
VESPA 125 GTR 125 VNL2T 2T AC `68-`78
VESPA 125 Super 125 VNC1T 2T AC `65-`69 11001 ->
VESPA 125 TS 125 VNL3T 2T AC `75-`78
VESPA 150 GL 150 VLA1T 2T AC `62-`64
VESPA 150 Sprint 150 VLB1T 2T AC `65-`74
VESPA 150 Sprint Veloce 150 VLB1T 2T AC `69-`79
VESPA 150 Super 150 VBC1T 2T AC `65-`79
VESPA 160 GS (GS4) (D) 160 VSB1-2T 2T AC `62-`64
VESPA 180 Rally 180 VSD1T 2T AC `68-`73
VESPA 180 SS Super Sport 180 VSC1T 2T AC `64-`68
VESPA P125X 125 VNX1T 2T AC `77-`82 -> 146313
VESPA P150 S 150 VBX1T 2T AC `78-`90 -> 169035
VESPA P150X / PX150 E 150 VLX1T 2T AC `78-`85 -> 264564

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