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Racing Crankshaft MAZZUCCHELLI

for Vespa 125 GTR 2°/TS 2°/150
Sprint V 2°/Super 2°/P125
-150X/PX125-150 E/Lusso/MY
disc valve, stroke 57,0mm, conrod 105,0mm,
pin 15mm


Racing crankshafts are a simple and effective tuning upgrade for every disc slide valve engine. A racing crankshaft gets higher rpm’s, your engine will be agile and have more pep. Better acceleration and higher top speeds are the result.

A racing crankshaft has noticeably longer intake timing in comparison to an original crankshaft. Your fuel charge will also be greater. The crankwebs are streamlined and polished, turbulence and flow blocks are reduced. The connecting rod is partially a polished edged connecting rod, the lower connecting rod bearing is a silver bearing. All crankshafts are delivered with upper connecting rod bearings.

High quality racing crankshafts from Italian manufacturer MAZZUCCHELLI have minimal production tolerances, lowered bearing play and a very good price/performance ratio. High speeds and absolute durability are a guarantee. We are offering a supplementary finely balanced version. In this version, the connecting rod is balanced at 12 o'clock. This shaft operates impressively quiet.


These racing crankshafts, produced by TAMENI, possess extremely close-fitting, high precision pressed connections. This guarantees sustainable higher revs and also increases its durability.

The race crankshafts produced by PINASCO and JASIL possess polished and gas-flowed crankshaft webs, as well as high-end forged con-rods. Both crankshafts also possess silver-cage big-end bearings. A special feature of these crankshafts are the extra holes and slots provide to ensure adequate lubrication to the bearings at both ends of the con-rod.

Additionally PINASCO produce an even more racing orientated version in the form of the 'Competizione Crankshaft' that comes with many advanced features including more extreme inlet port timings, gas-flowed profiling, tungsten balancing weights and innovative PTFE web inlays to ensure a higher primary compression ratio at low revs. The perfect complement for both road-going and race-orientated set ups!

PINASCO recommend that this crankshaft be used in combination with a lighter flywheel and an electronic ignition system such as the PINASCO Flytech, VESPATRONIC, PARMAKIT, or the versions produced by MALOSSI or POLINI.

The current insiders favourite is the even better JASIL super racing crankshaft which, along with the aforementioned advantages also possesses beautifully polished and profiled crankshaft webs that provide an inlet port timing of 124°/6° before TDC!

POLINI can also supply a highlight in this array. Their gas-flow profiled crankshaft has an inlet port timing of 141°/6° after TDC. They are excellently manufactured, precision-balanced and convince of their potential with a beautifully gas-flowed and polished (lipped) disc-valve web profile.


Conclusion: This doesn't have to be combined with a tuning cylinder; you'll get a noticeable performance plus when used with your original cylinder.


Racing crankshaft / stroke 57 mm / connecting rod 105-110 mm / 25/24 mm, M12

Racing crankshaft, with Ø 95 mm crankweb (flywheel side), ø 97.9 mm crankweb (disc valve side), partially balanced at 12 o'clock, lower connecting rod bearing = silver bearing, 105mm connecting rod (125/150 cc) or 110 mm connecting rod (200cc), 42mm stroke (T5) or 57mm stroke (PX), oil seal housing 24mm, bearing housing 25mm, stump cone with M12 thread, incl. connecting rod bearing


SIP-TIP: new bearings, crankshaft gasket rings and woodruff key are a must, new gasket set, clutch and fly wheel nut as well. A good complement would be a touring-race cylinder and exhaust system such as SIP Road, the SITO Plus or the SIP Performance. Adjust ignition and jets!


Ralf, SIP man, Germany:

"Ralf (LC Augsburg) went with us on a SIP trip to Italy. His 12PS PX - equipped with a racing crankshaft - was so strong uphill that it almost made the others, who had much stronger engines, cry!


SIP Community user "tcpip", Germany:

"Great workmanship, good price. Good product."


SIP Community user "Free", Germany:

"Very smooth running. Definitely worth its price."

SIP Community user "tcpip", Germany:

 "Great workmanship, good price. Good product."

Customers also searched for this article with:  race crankcase, racing crankcase, race crankshaft, tuning crankshaft, performance crankshaft

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Spare Parts
icon scootermodels This product fits the following models
divider Producer/Model divider cc divider Type divider Engine divider Yr. of Const. divider Extra
LML Star 125 2T/ DLX / Via Toscana / Deluxe 125 2T AC
LML Star 150 2T / DLX / Via Toscana / Star / Stella / Belladonna RV 150 2T AC
divider Producer/Model divider cc divider Type divider Engine divider Yr. of Const. divider Extra
VESPA 125 GTR 125 VNL2T 2T AC `68-`78 145901 ->
VESPA 125 TS 125 VNL3T 2T AC `75-`78 18139 ->
VESPA 150 Sprint Veloce 150 VLB1T 2T AC `69-`79 294260 ->
VESPA 150 Super 150 VBC1T 2T AC `65-`79 412374 ->
VESPA COSA 1 150 VLR1T 2T AC `87-`90
VESPA COSA 1 125 VNR1T 2T AC `88-`91
VESPA COSA 2 150 VLR2T 2T AC `91-
VESPA COSA 2 125 VNR2T 2T AC `91-
VESPA P125X 125 VNX1T 2T AC `77-`82
VESPA P150 S 150 VBX1T 2T AC `78-`90
VESPA P150X / PX150 E 150 VLX1T 2T AC `78-`85
VESPA PX125 2011/ 30 Jahre 125 ZAPM74100 2T AC `11-
VESPA PX125 CAT 125 ZAPM50100 2T AC `07-
VESPA PX125 E 125 VNX2T 2T AC `81-`83
VESPA PX125 E `98 / Millenium 125 VNX1T 2T AC `98-`05
VESPA PX125 E Lusso/EFL/Arcobaleno / Elestart 125 VNX2T 2T AC `83-`97
VESPA PX150 2011 150 ZAPM74200 2T AC `11-
VESPA PX150 E `98 / Millenium 150 VLX1T 2T AC `98
VESPA PX150 E Lusso/EFL/Arcobaleno / Elestart 150 VLX1T 2T AC `83-`97

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