I aint an expert M8, but think id be taking it for a RR set up!
The last thing you want hapening is dammage to your new engine!

Have you had the fueling timimg set up?

The reluctancy to start could be a timing related issue!
I had similar issues with 1 of my S2's (Reluctance to start on cold & at times needing bumped to start when warm) and it was all down to 2 much retard on the ignition.

Dont mess about with it!

Hope you get it sorted!


Andy