I'll have to find a ruler or caliper this weekend to get the sizes but I am trying to bolt up some GSXR 600 throttle bodies to my CB650 head. the spacing is almost dead on but the carb body has about the same OD as the OD of the stock 650 rubber coupler. I need something to reducing it down and was thinking either a pair of flanged carb mounts on a alloy bar but at $15 a coupler ($30 a cylinder) plus the machining on the barstock and its cost I could end up with well over $200 in a adaption.
Is there a source to get reducing couplers? I will be dropping off some stuff for some custom machining so would I be better off with a aluminum "bushing" slide over the stock carb spigot on the head and blended with epoxy? I am planning on sending the out for porting in the near future
