FWIW I personally don't count Yoshimura, Ten Kate, Jamie James or other builder's bikes as "cheater" bikes...
I'm only referring to bikes sold by the factories in limited quantities for the sole purpose of being able to race them. Also I don't include bikes that have a different model designation IF a "normal" version of the same bike isn't also sold the same year, which should redeem some or all of the Suzukis.
Oh and I definitely don't count bikes like the Mat Mlladin GSXR1000, Telefonica Moviestar GSXR600, Fiat R6 or Smokin' Joe's CBR600...