franch wrote on 01/08/08 at 12:46:13:thanks for the info !
am i to assume i can just attach the 87 carb to my 98 bike and not do the half spacer mod ?
Yes. It is because of those carb changes that the later model Mikunis need the upgrades.
To date, I haven't found if there are any fundamental differences in the stock exhausts between '86 and '93. Haven't known anyone to be able to make that comparison.
Make the carb swap, and then think about what you might need to do. You just won't be able to use the standard wisdon that most of us follow. You'll be on your own, pretty much.
Not sure, but I think those early carbs had adjustable needles, and you won't need the spacer mod anyway. Either way, the needle and jet have different profiles than your '98, too.