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WebshopVespa Smal...TuningHigh End R...Gearbox 26/69, (2,65) teeth,
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Gearbox 26/69, (2,65) teeth,

for 105-130cc cylinder, DRT
RACE, for Vespa 50-125/PV/ET3
/PK50-125/S/XL/XL2
straight teeth

The usual method of altering the overall gear ratio of a small frame motor is by changing the primary drive. A taller primary drive really starts to make sense with all cylinder kit conversions over 75cc. Principally speaking, the stronger the motor, the taller the overall gear ratio should be. The gear ratio produced by the primary drive effects the gear ratio of the whole motor (overall gear ratio) they comprise of 2 gear cogs in the small frame motor, the 1st smaller one, located on the crankshaft and the larger around the outer edge of the clutch basket. The gear cogs are almost exclusively straight cut items. They lose less energy than synchromesh versions and are so more efficient, creating virtually no axial thrust on the bearing of the input shaft/ clutch. If you require a higher overall gear ratio for your motor setup but do not want the hassle of taking the motor apart completely, you can just change the primary drive for the same effect.

 

DRT have equipped these sport primary drive units with their very own CNC machined spring retaining plates that have a more sturdy construction and also stiffer springs so offering a simple primary drive plug-and-play alternative to a complete primary drive service.

 

The DRT race primary drive unit includes the in special steel CNC machined primary/clutch basket produced by DRT. This high-end kit is very popular on the Italian race scene as it is a dedicated race product and not really suitable for every day road use.

 

Conclusion: If you are looking for a reinforced primary drive unit then look no further.

 

SIP-TIP: Do not forget to order a new fixing nut for the input shaft, a safety washer, new bearing and fresh gearbox oil for safe and enduring use of your motor.


OEM Numbers (for the purpose of comparison)  zzpr S125 rdpz69.26-700k/Rac. (DRT)


Customers also searched for this article with:  gear box cogs, gear kit, transmission, primary transmission, gear box, gearbox cogs, upgearkit, gear ratio, up gear kit, gear up kit, Gearing, upgear kit


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$238.69
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15338000
764g / piece
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icon scootermodels This product fits the following models
  VESPA
divider Producer/Model divider cc divider Type divider Engine divider Yr. of Const. divider Extra
VESPA 50 / N 50 V5A1T 2T AC `63-`71 not in series
VESPA 50 L 50 V5A1T 2T AC `66-70 not in series
VESPA 50 R 50 V5A1T 2T AC `69-`83 not in series
VESPA 50 Revival 50 V5R1T 2T AC `90- not in series
VESPA 50 S 50 V5SA1T 2T AC `63-`84 not in series
VESPA 50 Special 50 V5A2T 2T AC '69-'72 not in series
VESPA 50 Special 50 V5B1T 2T AC '72-'75 not in series
VESPA 50 Special 50 V5B3T 2T AC '75-'83 not in series
VESPA 50 Special Elestart 50 V5B4T 2T AC '75-'76 not in series
VESPA 50 Special Elestart 50 V5B2T 2T AC `72-`75 not in series
VESPA 50 Special Elestart 50 V5A3T 2T AC '69-'72 not in series
VESPA 50 SR / Sprinter 50 V5SS2T 2T AC `71-`79 not in series
VESPA 50 SS / Super Sprint 50 V5SS1T 2T AC `65-`71 not in series
VESPA 90 90 V9A1T 2T AC `63-`84 not in series
VESPA 90 Racer 90 V9SS2T 2T AC `71-`74 not in series
VESPA 90 SS Super Sprint 90 V9SS1T 2T AC `65-`71 not in series
VESPA 100 (UK) / 100 Sport (US) 100 V9B1T 2T AC `78-`90 not in series
VESPA 125 125 VMA1T 2T AC `65-`67 not in series
VESPA 125 Primavera 125 VMA2T 2T AC `67-`83 not in series
VESPA 125 Primavera ET3 125 VMB1T 2T AC `76-`90 not in series
VESPA PK 50 50 V5X1T 2T AC `82-`84 not in series
VESPA PK 50 S / Elestart 50 V5X2T 2T AC `82-`84 not in series
VESPA PK 50 S Lusso / Elestart 50 V5X2T 2T AC `85-`88 not in series
VESPA PK 50 SS / Elestart 50 V5S1T 2T AC `83-`86 not in series
VESPA PK 50 XL / Elestart 50 V5X3T 2T AC `85-`90 not in series
VESPA PK 50 XL FL 50 V5N1T 2T AC `90- not in series
VESPA PK 50 XL HP 50 V5N2T 2T AC `91-`91 not in series
VESPA PK 50 XL N NUOVA 50 V5X5T 2T AC `89-`90 not in series
VESPA PK 50 XL Rush / Elestart 50 V5X4T 2T AC `88-`90 not in series
VESPA PK 50 XL2 / Elestart 50 V5X3T 2T AC `90- not in series
VESPA PK 50 XLS 50 V5S2 2T AC `86- not in series
VESPA PK 80 S / Elestart 80 V8X5T 2T AC `82-`86 not in series
VESPA PK100 S / Elestart 100 V9X1T 2T AC `82-`84 not in series
VESPA PK100 XL 100 V9X2T 2T AC `86-`90 not in series
VESPA PK125 125 VMX1T 2T AC `82-`85 not in series
VESPA PK125 ETS / Elestart 125 VMS1T 2T AC `84-`85 not in series
VESPA PK125 N NUOVO (FL) 125 VMX7T 2T AC `90-`91 not in series
VESPA PK125 S / Elestart 125 VMX5T 2T AC `82-`84 not in series
VESPA PK125 XL / Elestart 125 VMX6T 2T AC `86-`90 not in series
VESPA PK125 XL2 125 VMX6T 2T AC `90- not in series

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