Hi all are the engines in the zxr and zzr the same but tuned differently? Just had an engineering idea similar to the yamaha i've already built.
Cheers Steve

zzr and zxr engines are V different ..

zzr400 is just a sleeved down zzr600 afaik

zxr400 engine wasn't used in anything except zxr400's and the 1988 ZX-4