Posted: 2007-02-07 12:25
I have a 90' Suzuki 750 gsxr. when I started it this spring it wouldn't run without the choke on so I pulled the carbs off and cleaned them. me being me, I didn't take the jets out, I just sprayed them with gum out. I put the carbs back on, started the bike and was surprised to discover that the bike would not idle down (though it did run with out the choke) I turned the idle down (all the way) it made no difference. also when I cracked the throttle it would rev down very slowly
and would backfire (occasionally) through the muffler. also-the oddest thing- the 2 outside cylinders got very hot, while the 2 inside ones remain just get hot. as far as I can tell there is no mixture screw on the carbs. there is a pilot screw (I don't know what that does though). so-
I pulled the carbs back off, went completely through them (cleaning) including adjusting the butterflies so they close all the way when not open. I put them back on to reveal the same outcome. the only conclusion I can come to is that there is an air leak on the intake boot (manifold.) what do you think could be to blame?
I know you don't want to hear this but I think your carbs may still have some foreign matter clogged up in them. I suggest you either take them to a shop that can fully disassemble and clean or buy a book to tell you how to do it and then properly adjust the carbs for your bike.
For more information please see: http://www.repairmanual.com/motorcycles/1990/62/6/5867
Thanks.
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