[Twitch]

Hey, I have a suzuki gs500f, and the blasted thing keeps stalling out. I will have the engine all warmed up and have it at a good 6000 rpms and squeeze the clutch in to stop and the thing growls and dies. The oil pressure light is not on and when it’s in gear and moving it’s great. The owners manual says use at least 87 and i use 91. Could it be causing the fuel mix to be to rich and therefore stall the engine, or could it be something else. Any help or advice would be appreciated. Thanks
-Twitch

[bigguybbr]

What is your bike idling at when you have it warming up? Check your owners manual to see if it is idling too low. There is usually a screw where you can adjust the idle speed if your bike isn’t fuel injected

[Twitch]

The bike idles at 1300 rpms which is within manufactured recomendations, in fact it’s at the top end of it. It only really stalls when you punch in the clutch after driving and then come to a stop, if you’re just stitting or you’re moving it won’t stall. The exhuast smells really rich too. Do you think it’s running too rich and it might just be it needs a lower grade fuel? Or maybe the carbs? Any help would be great, thanks for the suggestion.

[Gary856]

I don’t know why your bike stalls like that but I know octane rating has nothing to do with the “richness” of the gas. Higher octane means there is more anti-knock additive in the gas. If your bike (or a car for that matter) is working right, there is no way for the small difference in octane rating (87 or 91) to cause stalling.

[Jay T]

If it is gravity fed check fuel filters if it is vacuum or fuel pump, have a shop check for vacuum leaks or bad pump.
Best way to tell the diff is; look at fuel supply valve. If it has on/off/res it is gravity fed. If it has on/pri/res (pri is prime), it is either vacuum fed or has a fuel pump. If you are an ok wrench, get the (Haynes or Chiltons) manual. If you are not, find a good certified shop.

Jay T.
http://www.ridesafe.today.com

[nau_lax21]

i have a k7 gs500f. i just use plain 87 octane gas. i had the same problem in the worst part of winter when it was below 20 in the morning. (i rode year round unless snow was coming down)

for me the problem was solved by letting the bike warm up for a solid 3 minutes or so. sounds to me like you just need to let the engine warm up a little longer

i would also leave the choke in for the first half mile or so of riding in the morning

now that its high 40s-low 50s in the morning the bike needs 15 sec or so warming up most of the time with 5sec of choke.

so not sure what the weather is like for you, but if its brrrrr chilly outside, let the engine warm up a minute longer and see if that makes a difference

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