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Primary Driven Gear 65 teeth DRT input shaft for Vespa 125 GT/GTR/Super/TS/150 GL/Sprint/V/Super/160 GS/180 SS/180 Rally/P80-150X/PX80-150 E/Lusso/'98/MY/'11/Cosa 125-150/T5
Part no.: 40432290
VAT included Free shipping
502g / Piece
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Primary Driven Gear 65 teeth DRT input shaft

for Vespa 125 GT/​GTR/​Super/​TS/​150 GL/​Sprint/​V/​Super/​160 GS/​180 SS/​180 Rally/​P80-150X/​PX80-150 E/​Lusso/​'98/​MY/​'11/​Cosa 125-150/​T5

suitable for clutch gear teeth=20/​21/​22, Ø40mm
  • with repair kit primary DRT
5 ratings
VAT included Free shipping
502g / Piece
Part no.: 40432290

Product description

The DRT Primary Gear with 65 teeth was developed to lengthen transmissions of large frame Vespas built from 1960 on up to 125/150 cc PX models. The DRT gear has a larger diameter than the PX200 primary 65, and matches the original. It's a perfect fit for all clutch gears with 20/21/22 teeth, though not with the PX200 clutch with 23 teeth.


SIP-TIP: Tried and tested: the combination of longer 4th gear w/ 33 teeth and short primary (65-20) or 4th gear DRT 36 teeth with a 21 or 22 toothed clutchgear.


Feasible Transmission Ratio

PX/T5/Cosa:                                                                                 Oldies:

65-22=2.95    65-21=3.10    65-20=3.25                                        22x65x25x45=5.30

37-21=5.20    37-21=5.45    37-20=5.72                                        22x65x25x44=5.20

36-21=5.06    36-21=5.30    36-20=5.57                                        20x65x27x43=5.17

35-21=4.92    35-21=5.16    35-20=5.40                                        20x65x27x42=5.05

34-21=4.80    34-21=5.00    34-20=5.26

33-21=4.65    33-21=4.86    33-20=5.10







OEM numbers (for comparisons): 8000000028792 - a02879 (previous: PRk VelPX 229 z6 (DRT)

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