Linky to kyosho website:
http://www.kyosho.com/eng/products/rc/np0806.html
Says its for SP but can convert RTR too so I assume it will work for a std ZX5 too. Not much detail though. Some posts on rctech.net aswell but again, not much detail.
I'm not going to be racing properly for a good year or two, at least until the kids can join in anyway so i won't buy it, but it does look interesting. Not sure if it needs/gets a new shell or not as piccies are quite small and I can't translate Japanese!