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Bell-Shaped Crankshaft SIP PERFORMANCE Uncle Tom for Vespa 125 GTR 2°/TS 2°/150 Sprint V 2°/Super 2°/P125-150X/PX125-150 E/Lusso/MY/Cosa
Part no.: 45022620
€300.00
Including VAT Free shipping
2,14kg / Piece
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Product image for 'Bell-Shaped Crankshaft SIP PERFORMANCE Uncle TomTitle' Images may differ from the original
Product image for 'Bell-Shaped Crankshaft SIP PERFORMANCE Uncle TomTitle' Images may differ from the original
Product image for 'Bell-Shaped Crankshaft SIP PERFORMANCE Uncle TomTitle' Images may differ from the original
Product image for 'Bell-Shaped Crankshaft SIP PERFORMANCE Uncle TomTitle' Images may differ from the original
Product image for 'Bell-Shaped Crankshaft SIP PERFORMANCE Uncle TomTitle' Images may differ from the original
Product image for 'Bell-Shaped Crankshaft SIP PERFORMANCE Uncle TomTitle'
Product image for 'Bell-Shaped Crankshaft SIP PERFORMANCE Uncle TomTitle'
Product image for 'Bell-Shaped Crankshaft SIP PERFORMANCE Uncle TomTitle'
Product image for 'Bell-Shaped Crankshaft SIP PERFORMANCE Uncle TomTitle'
Product image for 'Bell-Shaped Crankshaft SIP PERFORMANCE Uncle TomTitle'
New

Bell-Shaped Crankshaft SIP PERFORMANCE Uncle Tom

for Vespa 125 GTR 2°/​TS 2°/​150 Sprint V 2°/​Super 2°/​P125-150X/​PX125-150 E/​Lusso/​MY/​Cosa

  • reed valve
  • stroke 62.0mm
  • conrod 105.0mm
  • pin 15mm
 
TUNING RACE - for professionals
€300.00
Review now
Including VAT Free shipping
2,14kg / Piece

Product description

High end crankshafts for reed-valve Vespa PX engines.

 

Thomas Dolischka from Austria has earned himself a good reputation amongst vintage scooter fans that goes well beyond the borders of the Alpine republic. In the idyllic quiet of the Vorarlberger Rhine valley he has created and realised many spectacular scooter projects and also conceived and produced well thought through special components for race use. He is especially renowned for his crankshafts, that he has been marketing following small runs of production, known as his 'Uncle -Tom-Crankshafts'.

  • Minimal engine vibrations
  • Bell-shaped, especially suitable for reed-valve set ups.
  • High quality materials and production techniques

These crankshafts were considered as well constructed and reliable but regrettably Thomas ended their production and these popular crankshafts were no longer available. As Thomas only halted production due to a lack of time and was later convinced of the quality of our SIP Performance crankshafts, he fortunately gave us the chance of re-continuing their manufacture. This opportunity to recommence the supply of these sought after items was gratefully accepted!

 

Specification and types

We have the Uncle Tom crankshafts available to suit three engine types:

  • The original Vespa Largeframe engine casings (60mm, 62mm stroke)
  • The original Vespa Smallframe engine casings (51mm, 54mm, 56mm stroke)
  • The QUATTRINI Vespa Smallframe engine casings (60mm, 62mm stroke)

Installation of these crankshafts

Most versions of the Uncle Tom crankshafts are equipped with an unusually long con rod. To fit them correctly the engine casings will require modification and machining. The established rule is that 1mm of clearance around the crankshaft once fitted is sufficient for effective use. Before the engine cases are machined always check that there is enough material available for the modification. On Largeframe engines it is usually sufficient to machine the flywheel side of the crankcase open slightly and only remove the disc-valve sealing material in the larger half. The Vespa Smallframe engine casings also require the area between the cylinder base and crankcase to be rounded off, making room for the con rod.

 

Conclusion: High end crankshafts that offer the perfect opportunity to undertake lasting tuning measures in areas of the highest performance!

Technical details

  • Bell-shaped for reed-valves
  • Forged and polished con rod
  • Generous bearings cooling slots

The best set up – our SIP TIP:

Feedback

“I've been driving the 62mm long-stroke shaft in combination with the MALOSSI Sport 210ccm and SIP Road 3.0 on my SS180 Touring Vespa for 7000 km: 21 HP, 125 km / h top speed and 110 km / h cruising speed . Nice torque on pass roads, despite my 24 cog Cosa clutch, and very powerful. Perfect. The HardCoriscaTrip 2020 was a pleasure and for me also breakdown-free ;-)"

- Alex, SIP Scootershop, 08/20

 

"Just like to say very impressed with your SIP 62mm x 127 mm crankshaft, it's been taking 50bhp in its stride with no problem (unlike many others I have tried)."

- Matyn, SIP Dealer; 10/20

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Questions & answers

Let us and the community help you! You can ask your questions about the product here.

Downloads

File name File type Description File size
Gutachten_SIPRoad Gutachten_TUV.jpg 0,80 MB Download
Kurbelwelle-1 Technik Kurbelwelle 0,72 MB Download
Montage_lager_Kurbelwelle_PX Montage Lager Kurbelwelle PX 12,02 MB Download
Crankshaft technology Crankshaft technology 5,54 MB Download
Installation crankshaft bearing Vespa PX Installation crankshaft bearing PX 0,78 MB Download
Tuning summary largeframe Tuning summary largeframe 1,70 MB Download
MontageanleitungKurbelwelle SIP Montageanleitung Kurbelwelle 0,26 MB Download
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