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Crankshaft SIP PREMIUM for

Vespa 150 VBA/VBB 1°/T4/GL 1° Vespa
125 VNB1-5T,
disc valve, stroke 57,0mm, conrod 105,0mm,
pin 15mm, valve timing: 118°
/15° post TDC,
Grade A - perfect repair

A high end crankshaft for all vintage Vespa Faro Basso models. Highest quality, enabling an ideal restoration including a reliable, smooth-running motor.


Together with the cylinder, the crankshaft represents the beating heart of any internal combustion engine. It is amongst the hardest working components and the conversion of the pistons stroke to a rotary movement places the highest demands on both quality and the care taken during construction. The crankshaft should also be well balanced to reduce any unwanted vibrations and the oscillating mass kept to a minimum to support an efficient delivery of the power created by the motor. The big-end bearing rotates at the same rate as the motors RPM, receives lubrication from the petrol/two-stroke oil gas mixture and must withstand two abrupt changes in direction of the piston for each motor revolution. The crank-pin, connecting both crankshaft webs with the con rod, has to be pressed into the webs with a certain clearance to the openings in the webs. If this connection is not strong enough the crankshaft can twist and the crankshaft webs become misaligned and seize. To ensure the big end bearing receives sufficient lubrication the big end of the con rod should be provided with slots to facilitate this.


The SIP Crankshafts:

- Especially fine balancing

- High quality construction materials

- High precision manufacture


This all-new range of crankshafts are produced for SIP in Italy and satisfy all of the above listed demands. We have concentrated our efforts to provide the highest quality combined with tried and tested technological features. Each crankshaft is balanced specifically to suit the stroke, con rod length and model of scooter for which it is intended.


The SIP Premium range of crankshafts includes versions suitable for many of the rarer vintage Vespa models. We placed priority on being in a position to offer high quality aftermarket components to replace the originals which are long out of production.


Conclusion: An updated and upgraded alternative to the original crankshaft.


SIP – TIP: While replacing or servicing the crankshaft always fit a new set of bearings and shaft oil seals. A set of suitable crankshaft de/mounting tools are also advisable (#27338000, #21071000, #18119000)!

OEM Numbers (for the purpose of comparison)  97916-89270 - 48839 - 1313215 - ( 2/86657 - 89267 - 93742 - 97915 ) (PIAGGIO)

Customers also searched for this article with:  crankcase, cranckshaft

icon explos Spare Parts Catalogue
This article can be found in the following exploded drawings ... go Go to Exploded Drawings!
510061RA 329,00 €

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40069000 8,90 €

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Racing Crankshafts

189,00 €
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Product forums
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
VESPA 125 (T2/125) (D) 125 VNB1-6 2T AC `59-`65 -> VNB5M 033212
VESPA 125 GT / 125 Sprint 125 VNL1-2 2T AC `61-`73 VNL1M
VESPA 150 150 VBB1-2 2T AC `60-`67 -> VBB2M 260197
VESPA 150 150 VBA1T 2T AC `58-`60
VESPA 150 (T4/150) (D) 150 VGLA-B 2T AC `59-`65
VESPA 150 GL 150 VLA1T 2T AC `62-`64 VLA1M -> 036754,00

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