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Countershaft 12-13-17-21 teeth,
PIAGGIO with primary gear, 68
teeth for Vespa P125-150X 2°
bearing seat inside 42mm
The input shaft is also known as the lay shaft or the half axle. Together, the primary driven cog and the primary driven gear cogs make up the primary drive assembly. The set of gear cogs make up the smaller half of the secondary drive gear ratio assembly. The main difference between the various shafts available is the length and diameter of the bearing and bush or the differing number of teeth on each cog.
Regrettably, the only input shaft that PIAGGIO can still deliver is meant for the VESPA PX models. FA Italia still produce input shafts for VESPA models as far back as the GT/GL and SUPER. P/A can also still deliver shafts for several older models. WORB5 have a modified PX 200 input shaft for use in the PX80 gear box. This enables the use of the larger PX 125-150cc output shaft/ gear cogs for taller gearbox ratios to be achieved. The input shaft gear cog clusters have to be riveted to the suitable primary driven gear cog assembly. We even have the old three gear VNA input shaft gear cluster assembly in stock. The assembly includes the primary driven gear cog. PINASCO can also deliver a shorter fourth gear cog to complete the picture.
Conclusion: High quality replacement parts for the original gear box.
SIP-TIP: Always install and replace ALL of the smaller primary drive components during each major service. The securing plates on both sides of the primary drive, input shaft holding nut, tab washer and also the input shaft needle bearings should all be replaced for save and enduring use of your motor. Last but not least do not forget to order fresh gearbox oil, gaskets and all relevant oil seals!
SIP Community user 'hekan' on Art.-Nr. 88220000: "Nice fit. Good device with the right tolerances."
OEM Numbers (for the purpose of comparison)
236223 - 174735 (PIAGGIO)
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Multiple Gear, primary drive assembly