Crankshaft for the E-ignition conversion - the bridge between the Sprint engine and PX ignition.

A contact breaker ignition is prone to faults, only suitable for tuning to a limited extent and always a risk factor on long journeys. This is why it is often replaced with an electronic ignition. Riders of classic models such as the Vespa 125 VNB/GT/GTR/Super/TS and 150 VBA/VBB/VGLA/B/GL/Sprint/V/Super usually only had the choice between a BAJAJ ignition, which was discussed in terms of quality, or a expensive alternative. At the suggestion of STOFFI's Garage, SIP has implemented a suitable solution.

The idea behind it is to merge two types of crankshaft: The basis is the classic Sprint crankshaft with original bearing and shaft seal seat. This is combined by MAZZUCCHELLI ex works on the fan wheel side with a revised cone of the modern PX shaft, while the clutch side remains unchanged. This makes it possible to ride the proven and affordable PX-E ignition on the oldies - while retaining the original Sprint bearings and shaft seals. In addition, a racing shaft and a long-stroke shaft are now also available: The SIP racing shaft provides a noticeable kick with adapted timing, the SIP long-stroke shaft works with original timing, but with 60 mm stroke for a particularly high-torque result.

Due to housing tolerances, clearance or ignition problems can occur during ignition installation. To prevent cables from being crushed or the base plate having to be reworked, we recommend installing a spacer under the ignition base plate.