Help with carb running issue.

[Guest]

I'm trying to get my newly acquired GS1000S to run... the bike starts up okay and seem to idle fine... I do need to choke it when starting. The problem is when I open the throttle it just starts to rev up then bogs real bad and wants to die. I can immediately back off the throttle and open it just a little to keep it running.
Woould this an indication of a vacuum leak? Please help.

[tom203]

Do you seem to have stock airbox/filter setup, or pods? Since you bought it running this way, you will need to investigate what PO's have/haven't done. Sounds more like a mixture problem- lack of fuel, too much air as you come off idle;

[phantom5280]

Thanks Tom... when I got it... bike had not run for approximately 10 yrs. Did a carb rebuild and added pods since getting the airbox in and out is such a PIA.
I did pull the carbs and intake boots off last night and replaced the O rings which were pretty flat... I will see if this helps tonight after work.
Thanks again,
Steve

[luvmy40]

Did you rejet the carbs for the pod's increased air flow? Is the exhaust stock? Are the intake boots servicable?

Seal the air box up and reinstall it! (The pods will make your life a living hell. They have ruined many an up and coming cycle enthusiast.) Then start from scratch, valve clearance adjustments, carb cleaning & synchronization, etc. Do you have a Color Tune kit?

Was this your first time cleaning carbs? Even if not I'd honestly suggest tearing them down and doing it again. I'm sure you got your Mega Welcome from Basscliff, if not here's his site. There is a ridiculous amount of good info and tips there.

I'm in the process of bringing my first GS back to glory my self, but I have mechanically restored several vintage inline fours from Yamaha (you haven't lived until you've tackled a Mitsubishi carb rebuild) and Suzuki. Though not an expert authority by any means, I have determined that there are no shortcuts. Do it right and do it once. That is until it needs done again, i.e. valve adjustments. Don't skip steps and keep up on the scheduled maintenance.

Good luck and stay safe. Remember, every car on the road is trying to kill you. Make yourself a difficult target!

[tom203]

Yes, the stock airbox can be fun, but adding pods is even more fun as you try to sort out running issues. Consensus here is that cheap pods are a waste of time and trying to get CV carbs running right without a dynojet kit is difficult . That PIA airbox could bring back fond memories!

[luvmy40]

Air Box PIA?

Is there a drastic difference between the GS850L and the 1000S air box situation?

I ask because out of all of the Nippon bikes I've worked on(not that the number is all that large) the GS850L air box is the easiest to remove and reinstall of any. The Yamaha Seca AB cannot be removed without removing the engine from the frame. This is why you can almost get a pass for going to pods if the stock air box is damaged on a Seca.

[Big T]

Yes, the stock airbox can be fun, but adding pods is even more fun as you try to sort out running issues. Consensus here is that cheap pods are a waste of time and trying to get CV carbs running right without a dynojet kit is difficult . That PIA airbox could bring back fond memories!

How do you know he has CV carbs?

It could be a 79, since he doesn't say what he's really done to it

Steve

Read the Newbie mistakes list and see how you qualify

and put the airbox back on. If you're struggling that much with it, you're doing something(else) wrong

[tom203]

I don't but in previous posts, he said he was working on 80 gs1000, so I leaped to a conclusion that he was dealing with CV's as he wrestled with airbox.

[Octain]

That bike wont never run right with pods if the carbs haven't been appropriately jetted.
Depending on your experience I suggest making the stock air box work. Get the bike running *perfect* then do a pod mod if you still so desire.