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Primary Driven Gear 67 teeth,

input shaft, for Vespa 125 VNB
/Super/150 VBA/VBB/VGLA/B
/150 GS VS5M

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)  089911 (PIAGGIO)

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This article can be found in the following exploded drawings ... go Go to Exploded Drawings!
88216000 $23.59
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Gear Box - Input Shaft

This item is in stock in sufficient quantity.

300g / piece
Stock on hand   Amount


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fits on the following articles
divider Productname divider Art. No. divider Price divider Stock
Input Shaft Assembly 14-20-27 teeth, for Vespa 125 VNA, bearing seat inside 37mm 88219000 $97.74
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 VNB1M 068989 ->
VESPA 125 GT / 125 Sprint 125 VNL1-2 2T AC `61-`73 VNL2T -> 25784 (CH) (F)
VESPA 125 Super 125 VNC1T 2T AC `65-`69 VNC1M -> 011000
VESPA 150 150 VBB1-2 2T AC `60-`67 VBB1M 9225 -> VBB2
VESPA 150 150 VBA1T 2T AC `58-`60 VBA1M 124019 ->
VESPA 150 (T4/150) (D) 150 VGLA-B 2T AC `59-`65 VGLA1M 029963 ->
VESPA 150 (T4/150) (D) 150 VGLA-B 2T AC `59-`65 VGLB1T
VESPA 150 GS 150 VS1-5T 2T AC `55-`61 VS5M 00102950 ->

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