POLINI 202.1221 EVOLUTION primary transmission clutch bell straight teeth Z 24 72 for VESPA 50 75 100 125 ET3 PK XL ETS SPECIAL

POLINI 202.1221 primary transmission clutch bell straight teeth Z 24 72 for VESPA 50 75 100 125 ET3 PK XL ETS SPECIAL Polini straight teeth primary transmission for Vespa Small Frame and 125 ET3 The commitment and experience in competitions have led Polini designers to develop two new straight teeth primary transmissions with shock absorber and reinforced clutch basket. The clutch basket, machined from solid and subjected to casehardening heat treatment, allows the driving discs to work in drag on all 6 sides, thus reducing their wear. The shock absorber counterflange, also in casehardened steel, guarantees maximum resistance, allowing the clutch basket to be disassembled if necessary. The springs in special, very high-resistance steel are calibrated to avoid transmission breakages. Specific for both Vespa 50 and 125, the new transmissions are interchangeable with the original parts. Assembly is recommended on tuned engines or above 25Hp. To adapt the ratios to the different uses, three different pinions are available with teeth calculated to couple with the teeth of the Polini clutch bell: code 202.1418 - Primary pinion Vespa 50 Z=25 ratios + long code 202.1419 - Primary pinion Vespa 125 Z=28 ratios + long code 202.1420 - Primary pinion Vespa 125 Z=26 ratios + short Polini straight teeth primary transmission for Vespa Small Frame and 125 ET3: Code: 202.1221 straight teeth primary Vespa 50 Z=24-72 Code: 202.1222 straight teeth primary Vespa 125 Z=27-69 100% Made in Italy