Select scooter type
Select manufacturer
Select model

Product image for 'Bell-Shaped Crankshaft SIP PERFORMANCE Uncle TomTitle'
Bell-Shaped Crankshaft SIP PERFORMANCE Uncle Tom for Vespa 90-125/PV/ET3/PK80-125/S
Part no.: 45029200
€310.00
Including VAT Plus shipping
1,75kg / Piece
Product link copied to the clipboard
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' 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'
Product image for 'Bell-Shaped Crankshaft SIP PERFORMANCE Uncle TomTitle'
New

Bell-Shaped Crankshaft SIP PERFORMANCE Uncle Tom

for Vespa 90-125/​PV/​ET3/​PK80-125/​S

  • reed valve
  • stroke 56.0mm
  • conrod 110.0mm
  • forged con-rod, polished
  • cone 20/​20mm
 
TUNING RACE - for professionals
€310.00
Review now
Including VAT Plus shipping
1,75kg / 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

Customers also searched for this product with:

Express Shipping Worldwide DHL, UPS, FEDEX
SIP Aid Scooterists help!

Product fits

News for you Discover great new products!

Ratings

There are currently no reviews. Be the first and help others with a detailed review.

Notepad

Get inspired. This product is included in the following public notepads:
Notepad name User Change date Article Note
Gary List for Steve brelade July 6, 2021 15 View notepad
Quattrini 144 (153) 25+Ps SIP-Official March 27, 2021 26 View notepad
repair ghufronm February 7, 2021 7 View notepad
Gary wish jersey February 14, 2021 11 View notepad
Vespa Spezial MarkusH7147 July 23, 2021 153 View notepad
Quattrini 144 (153) 25+Ps fabian.fromm1 January 20, 2021 26 Steuerzeiten ca. 180/130 View notepad

Loading, please wait
Notepad name
Change date
Products

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
Kurbelwelle-1 Technik Kurbelwelle 0,72 MB Download
Crankshaft technology Crankshaft technology 5,54 MB Download
Tuning summary smallframe Tuning summary smallframe 1,87 MB Download
Tuningübersicht Smallframe Tuningübersicht Smallframe 0,20 MB Download
MontageanleitungKurbelwelle SIP Montageanleitung Kurbelwelle 0,26 MB Download
near Munich, Germany Visit our Flagship Store
Are you a retailer or would you like to become one?

Report an error

{{ __('contact.report_article.sku', { number: product.articlenumber }) }}
{{ __('form.maximum_text', { count: 500 - formData.message.length, max: 500 }) }}

Report content

Report content

{{ content.title }}

High-res product images

The following list is specifically for journalists interested in using information and pictures from the SIP Scootershop product range for their press coverage. All the materials (text and pictures) available in the download area of this website are subject to the copyright and other intellectual property rights of SIP Scootershop GmbH, Germany, and are offered for journalistic use only. No permission for commercial use!

Permission for any other use is subject to a request to SIP Scootershop GmbH, Marie-Curie-Str. 4, 86899 Landsberg am Lech, Germany, and requires formal written approval by the company.

File name File type File size
{{ item.name }} {{ formatBytes(item.size) }} Download