Does anyone know the outside diameter of a 98-03 FZS600 exhaust where it fits into the head? I need a new set of headers for my 400 and I'm trying to work out if the 600 ones will fit before buying them. I've seen all the usual 'same bike' and 'same head' stuff and I don't believe it for a second, there are so many subtle differences on that bike and most 600 parts don't seem to fit which is infuriating, and even the Yamaha parts department couldn't tell me.
Please help me before i take a sledgehammer to it