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Old 08-12-2008, 03:22 PM   #1
blueorion3
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Default 1981 GS450 takes long time to warm up, doesn't idle well

I got an 81 suzuki GS450 recently and have been having problems with getting it going. I can get it started fine with the choke half on (summer weather) but it takes at least 10 minutes to get it warmed up enough for it to idle without any throttle. BTW, I gradually turn the choke off as it is warming up.

It takes so long that I never have the patience to wait and have to get it into first gear and warm it up by riding instead!

Any suggestions for how to get it to idle quicker while warming up would be greatly appreciated.
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Old 08-12-2008, 03:55 PM   #2
sachiwilson
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Most old carbed bikes take a while to warm up, and even now I'll take off with the choke on with my 2004 Honda. So at least a little time on choke will be needed.

Still, it's quite possible that something is plugged in your carbs, and they need to be cleaned REALLY WELL. Pulling a 27 year old bike out of storage usually means that the gas has been sitting, and turning to varnish, all that while. If the old gas is clogging up the little passages in the carbs, the bike isn't going to run right.

You should also check the tank, and make sure it isn't full of rust. That can gum up the carbs quickly too.
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Old 08-12-2008, 07:49 PM   #3
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Default Suzuki P/N 86786-1 GS450 Pre-Heater

I have a limited quantity of factory Suzuki GS450 Pre-Heater units that might help you out.[
http://www.americasprideonline.com/p...37;20flame.jpg
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Old 08-12-2008, 07:57 PM   #4
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If the carbs are clean and the tank is too. Check into uncapping the air/fuel mixture screws. Very easy to do and will start like a totally different Machine. The thing is with the carbd bikes the Manufacture sets them up so lean to pass emmissions so it can be let into the U.S. as a U.S. model. Most times hindering the start up and performance. Should be located underneath by the bowls and if they havent been uncapped they'll usually have a brass plug hiding them. Good luck!
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Old 08-13-2008, 12:52 PM   #5
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Default These work good too....

Suzuki P/N H2SO4.1 GS 450 Warm Up Kit.

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Old 08-13-2008, 04:01 PM   #6
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It sounds like your exhaust is plugged up. Pull the mufflers and drill them out with a hole saw. Or just whang a chunk o' rebar through from either end. Then hang on, cause that bad boy gonna haul some ASS!
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Old 08-14-2008, 06:59 AM   #7
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You know Cud's, that looks remarkably similar to what we use here in the Pacific Northwet to clear Blackberry bushes and Morning Glory.....
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Old 06-11-2009, 08:28 AM   #8
chussey
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Hi. I just bought the same bike, and mine takes a while to warm up too. I think it's a common problem with them.

So, these may seem like stupid questions, but I'm not going to learn any more about my bike if I don't ask so...

The choke is on when the lever is DOWN, correct?

And I sometimes have trouble finding neutral from first... is that normal?

Thanks, and sorry if these questions are ridiculous. I'm just trying to know what I'm doing.
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