I think there's lots of errors in online specs and repeated mistakes in copying those errors site-to-site. Only 4-cylinder 250s got 45hp and to get it, they had to redline @ ~19000 RPMs+ !!! The ZXR-250a and ZXR-250c (1988-2004) 4-cyl models were only Kawi 250s that had 45hp and used 4x CVK-D30 downdraft carbs to flow enough air and fuel. That's
twice as many same-sized carbs as we have on our Ninjettes! One of the few correct spec-sheets for ZXR250 that didn't confuse it with an EX/GPz250 or ZZR250 (note sportier frame specs):
https://www.motorcyclespecs.co.za/mo...r250r%2089.htm
I was eyeing mid-90s CBR250RR 4-cyl for sale in SF for while. Just worried about getting parts for it.