Ducati: Add an extra cable to help start bike.

Add a fat lead from the battery + to the soleniod,
And another fat lead from the battery neg. to the engine earth point!

Link: https://www.ducati.ms/threads/slow-to-crank-over.131812/

Archive link: http://web.archive.org/web/20240830170206/https://www.ducati.ms/threads/slow-to-crank-over.131812/