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Gear Selector BSG "4-gear PK"

for Vespa 50 S 3°/Special V5B3
-4T 2°/SR (D)/100 2°/125 PV
2°/ET3 2°/PK50-125/S/XL/XL2
l 50,2 mm, hardened, round,
4-arms

Alongside Falc, Quattrini and Co. BSG offer some of the hottest tuning parts available to date. The three letters that make up the company name originate from the surname initials of high-end tuner Fabio Begani, racing legend Stefano Scauri and ET-3 wizard Alessandro Graiani. We could stop explaining right here because these guys don't do things by halves. Quite on the contrary BSG and the BSG supported pilots belong to the premier league of Italian scooter racing. Be it in the VPI (Vespa Pista Italia), the CIA (Campionata Italiano Accelerazione) or the new POLINI Cup. With a stunning performance of 48PS, the BSG smallframes was the most powerful scooter on the dyno at the Customshow in Landsberg 2013. It's clear that special components are required to rein such power.

 

 

If, while drag racing, you reach speeds of up to 136 kph when passing the 150m mark, then you will probably have already destroyed the odd gear selector. To prevent this BSG have included a reinforced Vespa PK gear selector in their motor that can survive power outputs of around 30 PS. The special steel used in its construction is called 18NiCrMo5 and is mostly only used for Moto GP components. Its surface is then exposed to an extensive finishing process for added durability. The mechanical tolerance between the gear selector spider and the shaft itself has been decreased to reduce the gears jumping out during acceleration. The selection process also becomes more precise. This gear selector, with a diameter of 50.2mm, can be used in combination with any of the existing PK shafts although the use of the BSG version is highly recommended.

Conclusion : If you have more than 30 PS available you cannot go wrong with this part.

 

SIP-TIP : Do not forget to order fresh gearbox oil and a mounting tool (part no 63791000) to make the assembly of the selector, springs and ball bearings much easier. Be careful to measure and adjust the clearances between the gear cogs as exactly as possible for an effective result.


OEM Numbers (for the purpose of comparison)  (DRT)


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$118.04
Art.No.
40431900
102g / piece
Stock on hand   Amount

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icon scootermodels This product fits the following models
  PIAGGIO
divider Producer/Model divider cc divider Type divider Engine divider Yr. of Const. divider Extra
PIAGGIO APE 50 50 TL1-2T 2T AC `69-`80 TL2T 47287 ->
PIAGGIO APE 50 FL / FL2 50 TL6T 2T AC `89-
PIAGGIO APE 50 FL3 50 TL5T 2T AC `96-
PIAGGIO APE P 50 ( Vespa Car ) 50 TL3T 2T AC `80-
PIAGGIO APE TM P 50 / Elestart 50 TL4T 2T AC `85-
  VESPA
divider Producer/Model divider cc divider Type divider Engine divider Yr. of Const. divider Extra
VESPA 50 S 50 V5SA1T 2T AC `63-`84 69444 ->
VESPA 50 Special 50 V5B3T 2T AC '75-'83 (A) 228069 ->(w/o speed liwith)
VESPA 50 Special 50 V5B3T 2T AC '75-'83 94315 ->
VESPA 50 Special Elestart 50 V5B4T 2T AC '75-'76 1514 ->
VESPA 50 SR / Sprinter 50 V5SS2T 2T AC `71-`79 10380 -> (D)
VESPA 100 (UK) / 100 Sport (US) 100 V9B1T 2T AC `78-`90 50001 ->
VESPA 125 Primavera 125 VMA2T 2T AC `67-`83 0150203 ->
VESPA 125 Primavera ET3 125 VMB1T 2T AC `76-`90 8161 ->
VESPA PK 50 50 V5X1T 2T AC `82-`84
VESPA PK 50 S / Elestart 50 V5X2T 2T AC `82-`84
VESPA PK 50 S Lusso / Elestart 50 V5X2T 2T AC `85-`88
VESPA PK 50 SS / Elestart 50 V5S1T 2T AC `83-`86
VESPA PK 50 XL / Elestart 50 V5X3T 2T AC `85-`90
VESPA PK 50 XL FL 50 V5N1T 2T AC `90-
VESPA PK 50 XL2 / Elestart 50 V5X3T 2T AC `90-
VESPA PK 80 S / Elestart 80 V8X5T 2T AC `82-`86
VESPA PK 80 S Lusso / Elestart 80 V8X5T 2T AC `85-`88
VESPA PK100 S / Elestart 100 V9X1T 2T AC `82-`84 4gear
VESPA PK125 125 VMX1T 2T AC `82-`85
VESPA PK125 ETS / Elestart 125 VMS1T 2T AC `84-`85
VESPA PK125 N NUOVO (FL) 125 VMX7T 2T AC `90-`91
VESPA PK125 S / Elestart 125 VMX5T 2T AC `82-`84
VESPA PK125 XL / Elestart 125 VMX6T 2T AC `86-`90
VESPA PK125 XL2 125 VMX6T 2T AC `90-

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