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Flowed Crankshaft SERIE PRO

by Worb5 for Vespa 125 GTR 2°
/TS 2°/150 Sprint V 2°/Super
2°/P125-150X/PX125-150 E
reed valve, stroke 60,0mm, conrod 105,0mm,
pin 15mm,
SPORT-TUNING, high-performance
& roadworthy

In the late 90's, beveled full circle crankshafts were built into powerful PX motors. Then, along came Andi Wrobel from WORB5, who introduced the first flowed crankshafts, and turned the reed valve market upside down. Flowed crankshafts are the sign of the times in crankshaft development for reed valve shafts. In the past few years there been a lot of movement in this scene - and several interesting versions have been developed, with top performances.


In the SERIE PRO line we offer crankshafts, unless otherwise noted, made on the basis of MAZZUCCHELI crankshafts, out of the renowned German tuning master workshop Worb5 - at fair prices. The flowed crankshafts have specially modified streamlined flanges. The crankshaft contour is modified to allow the fuel mix free flow. The fuel mix won't be blocked or create disturbing vortexes by the flange. Flange modification allows more usable fuel volume. Precompression sinks, more fresh fuel can steam in and a higher fill is achieved. This interplay allows a wider speed range and more power. Additionally, flowed crankshafts swing at 12 o'clock, allowing a very quiet run. They are available with either 57 mm or 60 mm stroke. Flowed crankshafts are only usable with a reed valve intake. Use with a disc valve is no longer possible. With a PX ignition, these shafts can be built into the series 1 of the Rally 180/200.


If your shooting for 20-25 PS, we recommend the laser welded version. Want more power? Then try the flowed EVO crankshaft or reed valves. Conclusion: Perfect for direct intake reed valve engines. Finally, a simple way to get the necessary intake diameter.


Flowed crankshaft / stroke 52-60 mm / connecting rod 105-110 mm / 24/25 mm, M12

Flowed crankshaft with streamlined crankwebs, balanced at 12 o'clock, lower connecting rod bearing = silver bearing, 105 mm connecting rod (125/150 cc) or 110 mm connecting rod (200 cc), 52, 57 or 60 mm stroke, oil seal housing 24 mm, bearing housing 25 mm, stump cone with M12 thread, incl. connecting rod bearing.


SIP community user "Trapp-Performance" about 46020000: "Great part! Shaft functions super."


SIP community user "Scooter and Spareparts" about 46040000: "Used together with reed valve, an absolute Must Have! Modification to flowed crankshaft shows fine balance reduces vibrations when driving. Smooth mmmmh."


SIP community user "worb5":  "Used with a 210cc Malossi, English exhaust, 30mm carburetor and of course a reed valve, the flowed crankshaft struts its stuff in all ranges. The motor turns real clean and is simply "sweet". Performance increase of 2 PS guaranteed. 23 PS and more with this combination can be reached."

91013000 9,90 €

incl. VAT  plus shipping.
22159184 114,00 €

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91020000 3,90 €

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90780000 7,50 €

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91012000 9,70 €

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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 VNX1T 2T AC `81-`83
VESPA PX125 E '98 / Millenium 125 VNX2T 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-`05
VESPA PX150 E Lusso/EFL/Arcobaleno / Elestart 150 VLX1T 2T AC `83-`97,00

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