2000 GS500e Carb problems

[Kerry]

idles at 1050 rough... checked the plugs again, they were both fouled with black soot. (too rich???)

I agree with dgyver:

Fouled plugs and/or bad spark. Check and clean all of the connections in the wire harness.

The sooty plugs and the weird behavior sound like what I observed when I had a corroded connector to one of the signal generator circuits.  (My bike was running on one cylinder.)

This post could be your gateway to some needed electrical troubleshooting.

[vfrocket]

I am beginning to doubt its my carbs....

could these symptoms be caused by anything else??

I notice when it is idling that I can see the gas flowing through the see-through filter I installed, (bubbles), but when the engine speeds up it fills the tube completely.. perhaps the petcock filter is clogged?? Just guessing.

I mean these carbs are not hard, and I have done everything to them, and it will run fine, and then poof it all goes to SH@% once I start the bike again.  

there is only one vacuum line, I checked it It seemed to be fine, no leaks..

i feel frustrated.

[Kerry]

I am beginning to doubt its my carbs....

could these symptoms be caused by anything else??
[...]
i feel frustrated.

I hear ya!  My bike was down for 5 months while I swapped carbs, coils, etc. from my other GS.  It wasn't until I went through the electrical troubleshooting (see my previous post) that I found the single corroded connector that was the cause of it all.  Reading through 2 pages of posts has got to be worth your time at this point.

[vfrocket]

OK... now that I am done pouting.... I read some of the other threads and discovered that I had installed something wrong which could explain my supposidly rich problems.

the needle that sits in the slider is supposed to have a plastic space installed above the pin so that the spring can hold the needle down. WELL, I istalled it by putting the needle through it, instead of on top. According to other posts this keeps the spring in the diaphram from holding down the needle, thus the needle will rise on its own, and allow gas to flow through the needle jets when it should not.

I am letting the bike cool down again, so that I can remove the gas tank again, and access the top of the diaprham slides.

I will report in and let you know if this resolves the problem.

keep your fingers crossed.

[Kerry]

Hopefully that's it.

Good luck!  

[vfrocket]

ok now shes back!!! funny how a 50 cent piece can ground the space shuttle.

I think it still needs some tweaking.

I set the air/fuel mix to 3.5 turns as recommended. and adjusted the idle to 1800 rpm...purs like a kitten.

However.... .... it throttles up great, but it is still slow to come down from high revs, and likes to hang out at about 4000 rpm. not sure what is causing this, there still may be some passage that is blocked and I missed it. I may try the old couple bottles of gumout in a tank trick and see if that helps.

any suggestions???

Anyway... thank you all so very much. this is the first time I have tried to repair my motorcycle and I think i can call it a success once I get it adjusted just right, and it would not have been possible without everyones help... Thanks to all.

Paul

[Kerry]

it is still slow to come down from high revs, and likes to hang out at about 4000 rpm.

Sounds like it's lean (too much air in the mix).  You could keep fiddling with the screws I suppose, but also check to make sure that the carbs are seated well in the intake boots that connect them to the engine.

Recycled pic.  The idea is to see if introducing a volatile substance in this area causes the bike to rev up.  If so, there is a bad seal somewhere, and extra air is leaking in and leaning out the mixture.

[vfrocket]

just spray it while its running???

dont want to start a fire.

plausable, I had thought of that. this bike sat up in storage for almost 3 years so it is entirely possible that the boots have a crack in them somewhere.

[The Buddha]

WD40 will burn if you spray it into a candle or lighter ... but around a hot motor ... no ... I constantly spray carbs and rubber parts with wd or silicone ... Try it and see if idle races or the exhaut smokes ... BTW I'll bet you aren't sucking air ... you are about 1/2 turn out on mix screw ... I mean turn it out 1/2 turn or less ... Your 37.5 pilots ... Mine wont even idle with under 5 turns out when it had 37.5 ...
OK and retainer under needle ... would have made it sooooooo rich ... like lifting the needle 1/4 inch ... instead of the 1mm we do raise it with a #4 ...
Cool.
Srinath.

[vfrocket]

so i should adjust them out to 4 turns?

[vfrocket]

That did it!!!!!!!!

Thank you so much, she is running better than ever now.

Now to get some insurance, and a tag, and take her for a ride!


THANK YOU!!!!!!!