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Primary Driven Gear 16 (16/69

-4.31) teeth, for 50-75cc
cylinder, DRT for Vespa PK50/S
/XL V5X3T,
Ø 28,9 mm, helical cut teeth,
for primary 15/69

DRT have also decided to address the subject of all the remaining diagonally cut gears out there and have taller gearing now available for small frame motor setups with a cubic capacity of between 50 and 75cc. According to the cylinder used, an increase in top-speed of up to 10km/h (6mph) is possible.


The primary drive cogs with 16 teeth fit onto scooter motors with an original cog teeth combination of either 14/69 or 15/69. Due to their exact fit in combination with the original clutch cogs you can be sure of reliable performance over a long period. Before you order a replacement cog check the size or number of teeth on the original item.


The cog with 17 teeth is an excellent supplement to the cog teeth ratio of 16/68 from the V50 Special.


The cog with 19 teeth is suitable for the original cog teeth ratio of 18/67 which was used in the VESPA 50/N/L/R/S/Special/SR/SS models.


Conclusion: DRT has taken the PINASO idea and perfected it through further development.


SIP-TIP: Do not forget to order a new gasket set for the gear box cover and brake plate. A new safety washer is also a good idea.

OEM Numbers (for the purpose of comparison)  ip Sel 50 z16.329 su z69-15 (PKS) (DRT)

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Gear Box - Input Shaft - Kickstart Lever


32g / piece
Stock on hand   Amount


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Product forums
icon scootermodels This product fits the following models
divider Producer/Model divider cc divider Type divider Engine divider Yr. of Const. divider Extra
VESPA 50 R 50 V5A1T 2T AC `69-`83 (D) 887656 ->
VESPA 50 Special 50 V5B3T 2T AC `75-`83 (A) 228069 ->(w/o speed liwith)
VESPA 50 Special 50 V5B3T 2T AC `75-`83 (D) 72201->
VESPA 50 SR / Sprinter 50 V5SS2T 2T AC `71-`79 (D) 10380 ->
VESPA PK 50 50 V5X1T 2T AC `82-`84
VESPA PK 50 S / Elestart 50 V5X2T 2T AC `82-`84
VESPA PK 50 S Lusso / Elestart 50 V5X2T 2T AC `85-`88
VESPA PK 50 XL / Elestart 50 V5X3T 2T AC `85-`90 -> 161420

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