The bgm PRO Touring crankshafts are forged. The material is denser, thus dissipates heat better and is more resistant to distortion. In addition to the crank webs, the connecting rod is also forged.
BEARING
INLET ANGLE
RELEASE
The crankshaft design of the PX engines is based on that of the first 125cm³ engines from 1960 with approx. 5 HP power. Unfortunately Piaggio never really changed this design in the later displacement extensions . Thus, the load capacity of the crankshaft with the standard 200cc models with 12HP is mathematically already exhausted. The crank webs are very narrow and have very little overlap (web material that, seen in diameter, is available above the lower crankpin). This means that neither a particularly high interference fit nor a large crankpin can be used, as would be necessary (for the performance of today`s engines).
The BGM PRO Touring crankshafts have a very high material quality and bearing. In addition, the crankpins are glued for maximum torsion resistance. Due to the positive experiences, collected in many thousands of test kilometers of our own daily used engines, we release the BGM PRO Touring crankshafts for engine power up to 25HP. We recommend for engines in this power range the use of a lightened pole wheel with max. 2300gr.
CONCLUSION
TIP
Here now in the complete kit to convert an existing engine to the new shaft.
Included indelivery are
:- Crankshaft bgm PRO 57mm stroke (like standard)
- High quality bearing and oil seal set for crankshaft bearing in engine
- Oil seal set with metal seal ring on clutch side (brown, BGM PRO FKM/Viton® (E10 resistant))
- Complete BGM Pro silicone engine gasket set incl. O-rings
- New nuts and lock washers for the clutch and the fan wheel
- Gear oil 250ml SAE30