Could be. I asked the CML rep last time he was in and he said it was the 8.5 but he may be wrong.
The 8.5 is rated at 5800KV (5800rpm per volt I think) so that's very quick, so you may well be right about it being the 13.5 instead. I'll have a look on Novak's website, that's probably easiest...
-Steve
EDIT Yep, I've just found
http://www.teamnovak.com/products/br...article-id=182 this info on the 13.5. I've also been reading about the other Novak motors and it sounds like the 5.5 and 6.5 are going to be best for the outdoor series next year... 5.5 for high traction (like Faversham's grass field) or 6.5 for loose dirt.