OK, ok. It's a 1956 Maserati L 160 T4
. But I can't find YOUR NON-RED model. I thought Maserati motorcycles, like Ferrari motorcycles (and cars) were always red.
http://www.southbayriders.com/forums/attachments/25176/
Edit: Found it! It's a 1954 Maserati 160:
http://cybermotorcycle.com/gallery/maserati/images/Maserati_160_1954.jpg