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Main Area => General GS500 Discussion => Topic started by: Carrumbah on September 01, 2008, 05:40:17 PM

Title: Help! Idle racing after carb rebuild
Post by: Carrumbah on September 01, 2008, 05:40:17 PM
Greetings all. I went through both carbs, thoroughly cleaned them and set the floats and bolted everything back together. On first starting the bike the revs instantly raced to 6-7K at whick point I shut the bike down, moving the choke had no effect. I fiddled with the idle adjustment, starting with two turns out and then trying one turn and three--- seemed to make no difference. I did not touch the air screws at all.

Stangely, what caused me to tear into the carbs in the first place was a similar condition, high revs that "hung". I discovered a broken choke cable, replaced that, and no difference so the carb rebuild. There was a little of the usual rust but all else looked OK. What could I be missing? What is a good baseleine for the idle screw?
Title: Re: Help! Idle racing after carb rebuild
Post by: 5thAve on September 01, 2008, 05:46:45 PM
Carb slides are moving freely up and down? Throttle cable routed properly? (does engine speed change when turning handlebars left and right?) Dunno. Need more information, I guess.

Anyone else?
Title: Re: Help! Idle racing after carb rebuild
Post by: trumpetguy on September 01, 2008, 06:02:03 PM
My guess was going to be throttle cable too tight or in a bind.  5th Ave beat me to it...
Title: Re: Help! Idle racing after carb rebuild
Post by: Carrumbah on September 01, 2008, 07:32:06 PM
I did fiddle with the throttle adjustment at the recommendation of a friend, just a slight amount of play now. I have a new choke cable (Motion Pro-- not OEM) and the spring does not quite seat properly, not allowing the choke to close all the way. However, moving the choke lever has no affect on idle, though I can visually confirm that the choke opens fully. As background I had to replace the cable since it had entirely seized after last year's storage.