thanks Dr grimm.. my GT dose have 5 sets of twin spokes like the ones on the GS750T.. did not see any mods on the swing arm or lugs with out bolts in.

your close with the XJ400.. but it dose have a ridge in the center where the air valve is.... were mine dose not see pic of XJ400

http://www.sparkyslider.co.uk/galler...php?i=7177&c=6

the XJ550 has curved spokes.

the GS750T is the nearest yet..

until i can get access to the bike (as my mate has gone away on holiday) I'll
have to keep guessing !!!