... some good info here:
www.bali-kitesurfing.org/From what I found over the past few years going to Sanur, wind can be a bit hit and miss, especially around May but with the El Nino thing happening, you never know your luck. Luckily for me I've had every trip so far that's been a hit,,,, but,,,, I also helped myself by taking appropriate sized equipment. Plenty of people have gone and missed out. Don't expect powerful grunty winds that you might get back home and you'll be happier when the wind does come up. Lower your expectations, accept the winds you get, and that way you won't be disappointed, you will have some fun.
So having said that, I always recommend to take your gear if you can, but only if its appropriate for the location and winds. Obviously if you only have a 9 your going to make things harder for yourself,,, but the 13 just might be ok,,,, if your not a big guy.
From what I have seen, there are plenty of places you can hire boards from,,,, from the kite school in the south end of Sanur (who is also the local kite repair guy) or walk the foreshore path northwards and you will pass a few kite schools along the way who I'm sure will help you out. About 600 m up is Rip Curl kite school who usually have the latest Airush gear (
ripcurlschoolofsurf.com/the-schools/sanur/ ).
Further North again, about another 600m is our favourite, Bali Bagus Kitesurfing School next to Putu's Warung which has a bunch of different gear with plenty of boards from what I've seen and kites too.
I have seen a few more kiteschools further along the foreshore, further north at some of the big hotels but I don't know if you can walk in off the street and hire gear as I suspect its for hotel guests only, not sure.
Good luck and have fun!
cheers,
Robbie :)