Crankshaft -BGM Pro RACING (for diaphragm intake) full cheek 54mm stroke, 105mm connecting rod- Vespa PK125 XL2, PK125 ETS (Ø 24mm cone)

BGM PRO Racing crankshaft for reed valve inlet 54/105 mm Ø 24 mm

achieve

This minimizes the risk of twisted cheeks and welding with the usual disadvantages is not necessary.

In the case of virgin housings, the housing must therefore

be spindled

to 88 mm,

a huge advantage being the high-quality 105 mm long connecting rod, with cleanly executed lubrication holes and now 5 mm thick. This is eight millimeters longer than the standard connecting rod of the 125cc. The advantages of the longer connecting rod are a more favorable deflection angle and the resulting lower friction of the piston in the raceway.

This increases performance and results in lower pre-compression, which works particularly well with the new reso systems such as the Feuerzauber from Ludwig und Scherer.

The transition at the transfer ports to the engine housing can also be made much more flow-favorable, which results in better performance .

We also recommend the spacer (BGM0223) to distance the cylinder and keep the timing the same. Furthermore, longer M7 stud bolts (BGM 0290) must be used. All this is included in the kit (7673184).

The shaft is operated with the standard ETS bearing.

Torsion-proof, stable cheeks

- High-quality 105 mm long connecting rod with 5 mm thickness

- Good lubrication holes and slots

- Reasonably dimensioned thrust washers

- Designed for the high-speed ETS Lima bearing

- Lower pre-compression

- Favorable deflection angle on the connecting rod bearing