Easy peasy
I`m guessing it is almost identical to the 1150. In which case it is a super simple job.
Take off plastic cover(4 Allen screws), slacken off alternator bolts, off with old belt, on with new and tension up belt so that you can twist 90 degrees but no more. On my bike one of the bolts has a gear thing to assist with tensioning, which is nice.
If you have bmw engine bars fitted then you will need to remove the cross bar in order to get the plastic cover off.
Cheers, L.
PS. if it does break when you`re out & about(like mine!) you can still ride home. Turn off lights etc and head back.