They are rated at 42hp. my local bike club has had a few dyno days and they all get between 37-40.
Honda imported them here between '92-'99 (I believe), as the learner rider laws make them about the sportiest mass import bike you can buy. The law in New South Wales is a learner bike must produce less than 150kw/tonne (NSRs, RGVs etc don't comply, 450cc motards do), whilst most other states the law is anything < 250cc.
There are a lot of them around, pretty much anyone in NSW who wants a sporty learner bike gets one. Also, a lot have been grey imported by dealers, especially since Honda stopped.
They are awesome bikes to ride, for both the road and the track. My brother and several other people i know have owned them, and they are very capable machinery. My brother can go under 2mins at eastern creek on his old, road going '89 model, my best on the NSR is 2:05! Another mate who owned one was 6'4, he rode it to phillip island and back for the supers race last year (1000km each way) and did not have a single problem.
I have borrowed a friends workshops loaner ex-race one, dyno'd at 48hp and handles like a dream. About the most fun i've ever had on 2 wheels (blasphemy i know!).
this should give you an indication how popular they are down here: ($2300 AUS = £1000)
CBR250s for sale
_________________