Mikuni Two-Barrel BS30 carburetors

[adam kinmond]

I hate to bring up an old thread but i found this one whan i was searching for jetting specs. i have an 86 gs550ef and everything is stock. i have the carbs apart and i found sizes smaller than the manual states (#95 for 1,4 and #102.5 for 2,3) this thread recommends #105 for all four and 2 shims under the needles. this seems like a big increase from factory settings and even bigger than what was in there. anyone have anything to say about this?

[Nerobro]

The stock jet sizes for the GSX550's with the two barrel carbs are the 95 and 102.5's. 105's provide more power. It does seem like a big increase, but it works. :-)