Ok this thing is really starting to piss me off. It starts ok, it runs ok over 3500 rpm, when you stop to idle it either idles high, or dies. one in four times it idles good. Ive been working on this thing for about a month, new plugs air filter, found a few vacc leaks.......what else??? anyone??? Im on  yahoo messenger as ....   primoconcepts       im me if you read this and might be able to help, or Im gonna weld in a gsxr 1000 motor and run it into a canal

when the bikes warmed up whats the idle set at?  1200 +/- is what its sposta be if im not mistaken. 

its around 1200 when it stays idling....when sitting still, then if you give it gas it either revs and stays at 3000 or dies out. loading up. im about to give up and sell it

how long have you had the bike?

two months

did the problem just start or was it that way when you got the bike?  give me some info on this so i can try to help you. 

http://gstwins.com/gsboard/index.php?topic=41199.0

heres some reading for you until you get me more info.

bike did not run we got it going it only has 16,000 miles on it. we are on the 2nd tank  of new gas, just added seafoam. found a few vac. leaks sealed up. should we have just disassembled the carbs from the start. is that what we should do next??? new spark plugs are in it also as well as new air filter....I am a good car mechanic so just learning bikes, I will understand mechanic lingo...so .....      we are lost...

if it was me i would have pulled the carbs and did a good cleaning on them make sure all cables are routed in the right spots so they arent pulling or to tight both choke and throttle cables.  i would also see if you can clean the petcock i havent had the gs one off of the bike but on the vtr i just did the petcock was as bad as the carbs.

I will remove the carbs and clean. any helpful info on it? what to look for etc? Ive done tons of holley 4 bbls. lol. but new to this arena. what about siyncing them after? any tricks ? I do like the bike, but am getting frustrated and starting to look for a replacement. butif I get it running will keep it., it is alot of fun.

Quote from: joshr08 on April 16, 2009, 06:24:35 PM
if it was me i would have pulled the carbs and did a good cleaning on them make sure all cables are routed in the right spots so they arent pulling or to tight both choke and throttle cables.  i would also see if you can clean the petcock i havent had the gs one off of the bike but on the vtr i just did the petcock was as bad as the carbs.

+1
Clean carbs well (dont miss any passages), set float height, and put new plugs in again. Petcock is easy to remove and clean.

set float height by??..............

Dont seperate the carbs while cleaning, just open 1 side at a time top then bottom, get a real fine wire to push out sludge in passages, a single wire from a bicycle brake cable or speaker wire will work . theres a few holes u can easily miss. you probably dont have to remove the jets.

heres a link to a how to      

http://www.gstwin.com/carb_work.htm

floats are in the bowls, theres a needle on a metal piece that closes the passage when seated, that will need to be checked before you set it.  Use this

http://www.gstwin.com/float_height_check.htm

when i do my carbs i pull the jets and let them soak in automotive carb/injector cleaner for a while you would be suprized how much crud will come out without even touching them.  i then clean them with wire and/or a super small needle.  if you let them soak a while they will clean easier make sure you can look through all the holes.  through the center of the jet along with all the cross drilled holes as well.

do that test on your centerstand. I set my floats by sight, its just easy for me. i look at the side of the carb with the bowl off. then i move the float to see its action in conjunction with the needle. i then put the seam of the float parallel to the bottom of the carb and adjust the needle tab in which direction it needs to go, usually up to stop the bowls from filling up to high.

lopee thats how i do my floats as well.  i learned that trick from my grandfather years ago working on snowmobiles.  

Quote from: joshr08 on April 16, 2009, 06:52:09 PM
lopee thats how i do my floats as well.  i learned that trick from my grandfather years ago working on snowmobiles.  

Yea, i cant measure it, i just know that works, and spot on every time.

If you pull the jets clean em with lemon juice.
If not ... yea carb cleaner and gasoline.
Cool.
Buddha.

I'm assuming you have adjusted the idle screw underneath/ in-between the carbs, if not play with it a bit to find the proper idling spot.

+1
Cleaning out the carbs is a good idea

i was having a similar problem on my 97. it turned out that the petcock wasn't reliably providing fuel to the carbs.

old lawnmowers have petcocks too and after a while the little plastic diaphragm hardens up. if you trash pick a lawnmower and replace this piece, 9/10 times it'll start right up. might be the same sort of issue with the older gs'es.