I'd recommend against using 10W-50 as the thin 10 weight base oil needs a lot of friction modifiers to meet the standards of a 50 weight oil when at operating temp. 10 or 15W-40 would be fine, and 10W-30 should also work well. It may provide slightly less protection when being used in higher temperatures, but provided you aren't doing a trackday in 40'C heat then I wouldn't see a problem.
Also, if you change your oil regularly (every 5,000km or 12 months) along with the filter every change or two, then I generally wouldn't worry about the oil you use provided its either a 10W30, 40 or 50. Again, this is assuming you aren't doing silly things with your bike, such as prolonged periods at or near redline (eg 180km/h freeway rides).
Cheers - boingk