Originally Posted by nazarc

It is true what you say. It seems that the frame bends right there. The real problem is that we're talking about bending and torsion. The neophyte, going up on the curb of the track, fasollevare the machine: it is more likely to break the crown. An expert will not break easily. The support shown has solved the problems of breakage. We tested it on some models. I do not usually use. I have broken the crown of the second gear in the final ; break of the carter motore Sirio ... too close to the frame.
Some kits contain a defective part: The thrust bearing stopper decentralized. It causes breakage.
It is essential, however, real good gear transmission.

The option also improves the braking.