With these new crankshafts, from the Serie Pro range, we have a special treat in store for all Vespa Rally 180 and 200 (series 1) riders. At last you can also enjoy the privileges of crankshaft tuning!
Worb5 increases the inlet port timings of these crankshafts, which are originally based on MAZZUCHELLI items, to help the motor reach a higher range of revs which were previously unachievable by Rally motors. More RPM, improved acceleration and an increased top-speed are then made possible. These performance orientated crankshafts are ideal in combination with race cylinders as well as a suitable expansion chamber exhaust system. Attention: As Rally 180 and 200 come with different oil seals, the two crankshaft types are not interchangeable despite the seemingly same dimensions!
Conclusion: A simple yet effective performance enhancing measure to provide instant extra horses for original Rally motors.
Racing crankshaft/ 57mm stroke/ 24&25mm /M 12
Racing crankshaft with a 95mm diameter flywheel side crank-web, a 97.9mm diameter clutch side, disc-valve crank-web, oil-seal inner diameter: 24mm, bearing inner diameter: 25mm, blunt shaft stubs with a M12 threading, kit includes a small-end bearing.
SIP-TIP: Do not forget to check and adjust the ignition timing and the jetting of the carb for safe and enduring use of this crankshaft unit. We recommend the use of a MALOSSI 210cc cylinder and a touring exhaust such as the SIP ROAD as an ideal set-up for the Rally 200 motor in combination with this crankshaft. For the smaller Rally 180 motor there is the option of the 200cc cylinder (Part No. : 41470600) for added power.