for Vespa 125 VNB/ GT/ GTR 1??/ Super/ TS/ 150 VBA/ VBB/ T4/ GL/ Sprint/ V 1??/ Super 1??
disc valve
stroke 57.0mm
conrod 105.0mm
pin 15mm
valve timing: 112??/6?? post TDC
con-rod pin 22mm

Grade B – decent repair
Product description
If you restore a long neglected Vespa motor then you will often find the crankshaft immobilised due to rust or corrosion. The bearings and oil seals are often worn out and woodruff key recesses are no longer serviceable. If you are overhauling your motor and your existing crankshaft displays any of these signs of age, it should be replaced.The crankshafts are “Made in Italy” and are characterized by particularly good quality. ThePREMIUM crankshafts are used as a replacement for the original crankshaft. They are made in perfect quality.
MAZZUCHELLI has been delivering premium quality Vespa crankshafts with excellent value-for-money, for decades. They are 100% identical to the originals in appearance, production quality and port timings.Over the years PIAGGIO have used both low and high primary compression crankshaft setups. The early models also had bronze bushes instead of bearings installed on the con rods of their crankshafts. We have categorised the crankshafts according to manufacture information and original PIAGGIO parts catalogues. We provide all the specific data, necessary to identify the particular details of exactly the item you require for your type of engine: gudgeon/crank pin, conrod length and stroke. Please check all measurements of your existing crankshaft against these listings before ordering to ensure you receive the correct item. All of the above crankshaft details and more are available at our websitewww.sip-scootershop.com
.Conclusion
: Perfect for complete motor overhauls and mild motor tuning projects.
New crankshaft bearings, oil seals and the suitable woodruff keys, gasket set, nuts, safety washers are a must. To make the job a lot easier we also have all relevant crankshaft assembly tools available at our shop (PART No 27338000, 21071000, 18119000).
customer Olov S., Malm , Sweden:”Incredible. I am at the moment renovating two GS150, and in both cases the crankshafts where bad. I believed that it would be impossible to find new ones for such an unusual model, but you had them! And for a reasonable price, comparable with the cost for a renovation of the old!!! “Please note: The notch for locking washer castle nut is missing on the clutch side of the crankshaft stump. When using PX clutches we recommend to use the DRT nut and washer (Part no 11351940)
The timings stated above were determined viewing in the direction of the clutch side. That means: “138??/6?? after TDC: Inlet timing begins 6?? after TDC and stays open for 138??.Please note that the angular degrees given here are approximate values, as the crankshafts are reworked by hand.
OEM numbers (for comparisons):
91060 – 98497 – 130146 – 131321 – 131121 – 1313215 (PIAGGIO)