[Guido]

Not wanting to scare-monger, but my 748Bip had exactly the same symptoms (red light flickering at tickover, went out when throttle opened).

I figured it was the O/P switch too.
Continued to ride the bike down to the S. of France until the main bearing let go in a big stylee.

Best to have it checked. Main dealers should have a tool that plugs in where the O/P switch houses itself and they can then confirm your O/P is in line with the recommended numbers.

My repair list included new crank, front con-rod and piston and a helluva lot of time and labour.....thank god for warranty