Hi guys,
Short time reader, first time poster. *rimshot*
Anyway, I am a new biker and I just recently got my 1980 Suzuki GS250. It runs nice and strong and mostly works just fine exceot when it gets hot, the idle races and runs about 3500-4000rpms. If I get a chance to cruise for awhile, it settles back down to 2000-2200 or so. I know that's high anyway, and I need to adjust it, but what is causing the racing? The bike is air-cooled, so is it overheating in traffic? Is my choke broken and always on? What's the deal?
Thanks!
Idle racing
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Tower18CHI
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Tower18CHI
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- Joined: Mon Apr 16, 2007 8:04 am
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- Location: Chicago, IL
Update: I played with the throttle stop screw tonight and I got the warm idle to around 1800, but there seemed to be absolutely no effect after that point.
But now, I took it for a ride around the block, and the throttle hangs, and eventually (probably 4-5 seconds after closing throttle) returns to idle.
WTF. I know I need my carbs cleaned...would gunk in the idle circuit be causing all these gremlins and should I just knock off the tinkering until I clean the carbs first?
But now, I took it for a ride around the block, and the throttle hangs, and eventually (probably 4-5 seconds after closing throttle) returns to idle.
WTF. I know I need my carbs cleaned...would gunk in the idle circuit be causing all these gremlins and should I just knock off the tinkering until I clean the carbs first?
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Gnarlyroad
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idle racing
Probably not a bad idea to lube your throttle and choke cables as well.
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Sev
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Don't turn the pilot out more then 5 full turns. At that point it's possible that the screw will vibrate loose in normal running conditions.
Of course I'm generalizing from a single example here, but everyone does that. At least I do.
[url=http://sirac-sev.blogspot.com/][img]http://i12.photobucket.com/albums/a227/Sevulturus/sig.jpg[/img][/url]
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Tower18CHI
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Bump this back to the top.
Things I can rule out:
Carbs
Air leak at intake manifold/carb boots
What else could be doing this? Any other locations for air leaks? I read somewhere that the springs on the timing advance might be worn out, and sagging when hot, and thus advancing the timing at idle. Is this possible? If so, I could theoretically cover up or at least lessen the problem by using a higher octane gas, right?
Things I can rule out:
Carbs
Air leak at intake manifold/carb boots
What else could be doing this? Any other locations for air leaks? I read somewhere that the springs on the timing advance might be worn out, and sagging when hot, and thus advancing the timing at idle. Is this possible? If so, I could theoretically cover up or at least lessen the problem by using a higher octane gas, right?
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tim conroy
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Air leaks arent alway's easy to find.I would spray water mist around the boots where they connect to the cylinder.Go to your local dealer and order the intake boot 0-rings.They get hard and brittle and will not start sucking air till it gets warmed up.Spraying around the boots will not detect this,believe me.I know! They are cheap, abot 2 bucks a peice and a good place to start.Start simple and go from there.You will spend a lot less money that way.Also go to www.thegsresources.com for all the info you will ever need on your bike.