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?
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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. :-)You'd have to be crazy to be sane in this world -Nero
If you love it, let it go. If it comes back....... You probably highsided.
1980 GS550E (I swear it's a 550...)
1982 GS650E (really, it's a 650)
1983 GS550ES (42mpg again)
1996 Yamaha WR250 (No, it's not a 4 stroke.)
1971 Yamaha LT2 (9 horsepower of FURY.)Comment
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