The bgm PRO racing shaft with 54 mm stroke is the ultimate for racing or ambitious road tuning.
Unlike a normal shaft, the cheek diameter has been increased to achieve the necessary greater overlap at the lift pin and thus greater torsional safety despite the greater stroke.
attain. This minimizes the risk of twisted cheeks, and welding with the usual drawbacks is not necessary.

For blank housings, the housing should therefore be set to 88 mm

...have been turned.

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

This increases power and results in less precompression, which works great especially with new resonator systems such as Ludwig and Scherer's Feuerzauber.

The transition at the overflow to the engine body can also be designed in a much more flow-friendly way, which results in better performance.

We also recommend the spacer (BGM0223) to distance the cylinder and maintain the same time. In addition, it is necessary to use longer M7 pins (BGM 0290). All this is included in the kit (7673184).

The shaft is run with the standard ETS bearing.

- Stable, non-twisting cheeks

- High-quality connecting rod of 105 mm length with 5 mm thickness

- Good lubrication holes and grooves

- Reasonably sized thrust washers

- Designed for the high-speed bearing ETS Lima

-Low compression

- Favorable deflection angle to the connecting rod bearing