A special treat is the Racing Crankshaft SERIE PRO for the Vespa 125 VNB/GT/GTR VNL2T -> 145900/Super/TS VNL3T -> 18138/150 VBA/VBB/T4/GL/Sprint/V VNB1T -> 2942593/Super VBC1T -> 412373.

The intake timing of this Shaft based on MAZZUCCHELLI is extended by worb5. This revs up the tired original Engine. Higher revs, better acceleration and more top speed are possible as a result. The Racing Crankshaft also harmonizes very well in conjunction with 177cc Racing Cylinders and with touring racing exhaust systems.

Conclusion: Very good and simple tuning option for the weak, original Engine.

Racing Crankshaft / 57mm stroke / 20/25mm / M11

Crankshaft with Ø 95mm Lima cheek, Ø 97.9mm rotary valve cheek, shaft seal seat 20mm, bearing seat 25mm, pointed/thin Cone with M11mm thread, including connecting rod bearing

SIP-TIP: Adapt Ignition and jetting. A D.R./PINASCO 177, a touring exhaust such as the SIP Road or an Italian Exhaust and a 24 SI Carburettor are a good set-up.

Vespina issue 3/2011 about Art. No. 45131000: "At last, questionable quality replicas or expensive performance algae are a thing of the past. For around 130 euros, the days of breaker ignition are numbered."

The valve timing values listed above were determined as viewed from the clutch side. Example: “138°/6° past TDC” means that the intake valve begins to open 6° past TDC and remains open for 138°.

Please note: The angle values are approximate, as the crankshafts are machined by hand.