Is it worth it?

[zuluwiz]

just thought of this: the gas cap might not be venting.

[Tigeroffhell]

You can remove the tank and hang an external one for your tests. If the engine does not die out after short time that will tell you to focus on the petcock, tank, and lines.

So I had to replace the battery because the battery was bad and I got it going for about 30 seconds before it dies out idling, then I tried just going down the street and gave it some gas and it just would not accelerate and then died on me. also noticed it is leaking oil and my instrument panel wouldn't show me the rpms

[rphillips]

Just a couple of my thoughts, If carbs are full bike should idle way more than 30 sec. before out of fuel and dies. You say when you try to ride off and give it gas it just dies, that is what happens if the little rubber plugs are missing under the pilot jets. Normally the tachometer problems are cable broke or not fully connected.

[Tigeroffhell]

So an update! I changed the sparks plugs after I pulled them out and they looked real black and covered in soot so I though it would help to get some new plugs and that did help because it started right up! but then it was idling really high and it was late so I quit messing with it. Today tried to get it running again and it just wouldnt start so I pulled out the plugs the second and third spark plugs are getting no spark and did not change in color compared to the first and fourth spark plug which both give spark and looked covered in soot. I´m assuming that means I should get a new ignition coil. Also before changed the spark plugs I removed the air box and noticed that the air box isn´t complete the vent on the back of it looks like it fell off or broke and a previous owner of it decided to cover it up with a piece of cardboard will it be fine that way or should I look for a replacement? or could I replace them for podfilters? I keep seeing they suck but would it really ruin the performance of my bike?

[Tigeroffhell]

Also after the spark plugs I was actually able to ride it for a half block before I decided it would be better to coast back to the garage because it was idling really high, it was late at night and in an HOA lol

[Tigeroffhell]

also any recommendations for carb parts and parts in general? because I'm not sure if I should trust Ebay for parts

[gtem]

Don't swap the airbox for pods, you're going to send yourself down a real rabbit hole. For parts, Suzuki still sells a number of things brand new, I use partshark.com. Sometimes I use partshark.com to get a parts diagram and part number, then will go hunting around ebay for NOS/OEM/genuine Mikuni parts. Do not use cheap off-brand carb parts, specifically jets or float valves.

[Nessism]

also any recommendations for carb parts and parts in general? because I'm not sure if I should trust Ebay for parts

The high idle is because of an air leak. Must likely from the rubber carb boots attached to the head.

There are some links that will help you...

https://gsarchive.bwringer.com/mtsac/~cliff/storage/gs/Mikuni_BS-CV_Carburetor_Rebuild_Tutorial.pdf

https://www.thegsresources.com/_forum/forum/consumer-information/gs-parts-and-services/1703182-mikuni-bs-cv-and-vm-o-ring-kits#post1703182

http://www.thegsresources.com/_forum/showthread.php?t=171846

[gtem]

In my experience a high warmed up idle is also a common symptom of someone turning the throttle stop way up to help a bike with clogged pilot jets start and run when cold (to get a quick sale of an old bike that has sat, or simply out of ignorance). Have seen it numerous times.

[LAB3]

Let's keep something else in mind here guys. If the people who worked on this bike before couldn't keep it running after going through the carbs it probably means nobody was able to properly set the idle speed screw. Sure, a leaky intake is the likely culprit but there's other things to consider before looking at that part of the problem

[Joe Garfield]

No exaggeration: the only people in the world I let touch my bikes are people I've met on this forum.

[Rob S.]

Definitely not the 'mechanics' who previously worked on it. They are not qualified to work on old bikes.

[850 Combat]

There is a reason that there are a lot of survivors. A GS850 can take massive abuse