Had my MC21 crank split before buying bearings etc to check it wasn't scrap, took it to be rebuilt and the guy has asked if the big end pins are offset (he rebuilds RS250 cranks and they have a 20deg offset). Yam TZR/valve ones are parallel, and I initially assumed the MC21 to be the same..........? I am 99% sure it is parallel, but that 1% could be expensive!!
Can anyone help or offer any advice - have tried the search option but came up with nowt!
