Fazer 600 cut out problem

[BBROWN1664]

If it cuts out immediately when you put it in gear it is related to the side stand switch. The system is designed to stop you riding off with the stand down.
If it wont start in gear (with the side stand up) it is the clutch switch to look at.
If it wont turn over at all, check the kill switch.

If it loses power and dies then wont restart straight away (but turns over), try opening the fuel tank. If you get a hiss, check the breather pipes are not kinked under the tank. Another option could be carb icing so check the carb heaters.