7673184 Crankshaft set -BGM Pro Racing full circle, 54mm stroke, 105mm conrod- Vespa PK125 XL2, PK125 ETS (Ø 24mm cone)

Product Description

Crankshaft;Con rod;

Crankshaft set -BGM Pro Racing full circle, 54mm stroke, 105mm conrod- Vespa PK125 XL2, PK125 ETS (Ø 24mm cone)

Product ID: 7673184

Fits to:

Vespa 125 ET3 (VMB1T)
Vespa 125 Nuova (VMA1T)
Vespa 125 Primavera (VMA2T)
Vespa 50 FL (V5N1T)
Vespa 50 HP (V5N2T)
Vespa 50 L (V5A1T)
Vespa 50 SR ab Bj. 1975 (V5SS2T)
Vespa 50 Sprinter bis Bj. 1975 (V5SS2T)
Vespa 90 Super Sprint (V9SS1T)
Vespa PK 125 (VMX1T)
Vespa PK 125ETS (VMS1T)
Vespa PK 125S (VMX5T)
Vespa PK 50 (V5X1T)
Vespa PK 50N (V5X5T)
Vespa PK 50S (V5X2T)
Vespa PK 50S Lusso (V5X2T)
Vespa PK 50SS (V5S1T)
Vespa PK 50XL (V5X3T)
Vespa PK 50XL 2 (V5X5T)
Vespa PK 50XL Rush (V5X4T)
Vespa PK 50XLS (V5S2T)
Vespa PK 80S (V8X5T)
Vespa V 50 Bj. 1963 (V5A1T)
Vespa V 50 Bj. 1964 (V5A1T)
Vespa V 50 N (V5A1T)
Vespa V 50 Special (V5A2T)
Vespa V 50 Special (V5B1T)
Vespa V 50 Special (V5B3T)
Vespa V 50 Special Elestart (V5A3T)
Vespa V 50 Special Elestart (V5B2T)
Vespa V 50 Special Elestart (V5B4T)
Vespa V 90 (V9A1T)

Crankshaft set -BGM Pro Racing full circle 54mm stroke, 105mm conrod- Vespa PK125 XL2, PK125 ETS (Ø 24mm cone)
The 54 mm stroked version of our BGM crankshafts is the maximum and perfectly suited for the ESC racing series or ambitioned road riding. The larger diameter of the crank webs support a larger overlap for the big end bearings. This allows additional safety against the crank twisting.

In order to fit the larger diameter crank webs (87 mm on the flywheel side and 86 mm on the drive side) you have to machine the casings to 88 mm.

The next innovative feature is the piston rod length which has been increased to 105 mm (8 mm longer than on standard 125 cc Smallframe cranks).

The crank is a perfect fit to some of the latest Smallframe tuning kits that are designed to be run with this sort of piston rod.

Delivery complete with 8mm spacer, to keep the transfer times of certain cylinders the same, and longer and well build cylinder stuts for a save fit.

This results in better power and reduced primary compression, which works well with the modern day exhausts, such as the ones made by manufacturer Ludwig and Scherer, as the port transfers at the casing can be improved and the flow optimized.

-strong crank webs

-less twisting danger

-optimized flow

-higher primary compression

-less stress to piston and bearings

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