Pair of primary transmission POLINI 202.1222 EVOLUTION clutch bell straight teeth Z 27 69 for VESPA 50 75 100 125 ET3 PK XL ETS SPECIAL

Pair of primary transmission POLINI 202.1222 EVOLUTION clutch bell straight teeth Z 27 69 for VESPA 50 75 100 125 ET3 PK XL ETS SPECIAL Primary transmission straight teeth Polini for Vespa Small Frame and 125 ET3 The commitment and experience in competitions have led the Polini designers to develop two new straight tooth primary transmissions with flexible couplings and reinforced clutch basket. The clutch basket machined from solid material and subjected to heat-hardening treatment allows the driving discs to work in drag on all 6 sides, thus reducing their wear. The counterflange of the flexible coupling, also in case-hardened steel, guarantees maximum resistance allowing the possible disassembly of the clutch basket. The very high resistance special steel springs are calibrated to avoid breakages of the transmission itself. Specific for both the 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 different uses, three different pinions are available with toothing calculated to match the toothing of the Polini clutch bell: cod. 202.1418 - Primary pinion Vespa 50 Z=25 ratios+long cod. 202.1419 - Primary pinion Vespa 125 Z=28 ratios+long cod. 202.1420 - Primary pinion Vespa 125 Z=26 ratio + short Polini primary transmission straight teeth for Vespa Small Frame and 125 ET3: Code: 202.1221 primary straight teeth Vespa 50 Z=24-72 Code: 202.1222 primary straight teeth Vespa 125 Z=27 -69 100% Made in Italy