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WebshopVespa Smal...TuningRacing Cra...Flowed Crankshaft SERIE PRO
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Flowed Crankshaft SERIE PRO

by Worb5 for Vespa 50/N/L/R/S
/Special/SR/SS/PK50/S
reed valve, stroke 43,0mm, conrod 87,0mm,
cone 19/20mm, M10

The Flowed crankshafts belong to the Low Primary Compression (LPC) crankshaft type which originally leave the factory as MAZZUCHELLI or TAMENI full circle crankshafts. The SERIE PRO range of crankshafts are produced by the German tuners WORB5.

 

These flowed crankshafts are specially machined to optimise gas flow in the pre-combustion area of the crankcase. The crankwebs have been modified to enable the fuel mixture free flow, unhindered from the turbulence created by the crankshaft. This design also allows a higher volume of fuel mixture to enter the crankcase and so enable a higher compression of gases above the piston in the combustion area. This combination facilitates a wider power band and consequently higher maximum power. Flowed crankshafts are only suitable for use in reed valve motors. The original Vespa disc valve mechanism provided by the clutch side crank web is no longer possible with this heavily altered crankshaft.

 

Conclusion: Perfect for reed valve motors. Larger, gas flowed ports and inlets are finally possible!

 

SIP community user „rigger“, England:

“Flowed/mapped for your performance. Gas/oil decreased resistance. Equals more power on demand. Throttle response is even better.”

 

Flowed crankshaft / stroke 43/ connecting rod 87/ 19/20mm, M10

Flowed crankshaft with Ø 82mm crankweb (flywheel side), Ø 87mm crankweb (disc valve side), 87mm connecting rod, lower piston rod bearing = silver bearing, oil seal housing 20mm, bearing housing 19mm, pointed cone with M10mm thread, incl. piston rod bearing

 

SIP-TIP: New bearings, oil seals and keys are a must. Same goes for sealing kit, clutch-, and flywheel nuts. You?ll also need a POLINI, MALOSSI or HHP reed valve manifold.


Customers also searched for this article with:  Flowed crankcase


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$143.36
Art.No.
46100000
1,950g / piece
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icon scootermodels This product fits the following models
  VESPA
divider Producer/Model divider cc divider Type divider Engine divider Yr. of Const. divider Extra
VESPA 50 / N 50 V5A1T 2T AC `63-`71
VESPA 50 L 50 V5A1T 2T AC `66-70
VESPA 50 R 50 V5A1T 2T AC `69-`83
VESPA 50 Revival 50 V5R1T 2T AC `90-
VESPA 50 S 50 V5SA1T 2T AC `63-`84 (N)
VESPA 50 S 50 V5SA1T 2T AC `63-`84
VESPA 50 Special 50 V5A2T 2T AC '69-'72
VESPA 50 Special 50 V5B1T 2T AC '72-'75
VESPA 50 Special 50 V5B3T 2T AC '75-'83
VESPA 50 Special Elestart 50 V5B4T 2T AC '75-'76
VESPA 50 Special Elestart 50 V5B2T 2T AC `72-`75
VESPA 50 Special Elestart 50 V5A3T 2T AC '69-'72
VESPA 50 SR / Sprinter 50 V5SS2T 2T AC `71-`79
VESPA 50 SS / Super Sprint 50 V5SS1T 2T AC `65-`71
VESPA PK 50 50 V5X1T 2T AC `82-`84 -> 14531 (small cone)
VESPA PK 50 S / Elestart 50 V5X2T 2T AC `82-`84 -> 181678 (small cone)
VESPA PK 50 S / Elestart 50 V5X2T 2T AC `82-`84 3000001 -> 3007754, (electric start)
VESPA PK 50 S Lusso / Elestart 50 V5X2T 2T AC `85-`88 -> 181678 (small cone)

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