Running on 3 ?

[Par6]

Cam covers are round and shiny.

[Par6]

Ultrasonic cleaning is fine, do you have the equipment for this or would you be paying some shyster to do it?

I have a small ultrasonic cleaner, just about fits a carb in.

[Agemax]

you have an 8 valve engine then. the small U/S cleaner should be ok but doing the carbs 1 at a time will take ages, you really need to dip them first.

where in the UK are you, there are quite a few UK members now who may be fairly local to you if you need some help.

[Par6]

I'm in the north west near Manchester.

[Recoush]

Running into issue item Number 3
1, 2, 4 are steady at 10
3 is rapid 5

Using the 4 gauge set (vacuum gauge) rather than the color tune

Tried swapping 3 for 4 reads the same so not the gauge or tubing
Pulled the Plugs and checked for Spark seems to be OK (maybe weak hard to see in daylight?)

Adjusting the air screw 3 will either make it run wild or cut off so not air screw

Did order intake o rings so maybe that will be the issue
This is the 8 valve GS1000E 1979 US 12K never rebuilt Carbs just rebuilt
Intake o-rings do they exist on the rubber version or do I need to order new boots

Read about the butterfly maybe an issue (will check when I do the butterfly and our boots O-Rings?

Also plan to do a compression test next time I get a chance as some else mentioned
The other thing that bugs me is the 5 inch vacuum vs. 10 inch vacuum Should we be in the 20” range
One exception is a backfire at 3K-4K from either #3 or #4 guessing its number 3 :>)
Seems to run good in general
Any better ideas

[BassCliff]

Hi,

Any better ideas

Yes. Start your own thread instead of hijacking someone else's.

Put your bike's year and model in your sig file.

Thank you for your indulgence,

BassCliff

[BassCliff]

Greetings and Salutations!!

Hi Mr. Par6,

I just noticed you were new and probably haven't received your "mega-welcome". You'll find most of what you need to maintain your bike in the links below. There are hours of reading in the links below but will save you days in wasted effort and frustration.

If you are here you probably have a 30 year old motorcycle that needs about 20 years worth of maintenance. In the links below you'll find maintenance lists, documentation, wiring diagrams, "how to" guides, vendor links, tips, tricks, and a whole lot of GS goodness. This is your "mega-welcome". Let's get started.

Let me dump a TON of information on you and share some GS lovin'.

I just stopped by to welcome you to the forum in my own, special way.

If there's anything you'd like to know about the Suzuki GS model bikes, and most others actually, you've come to the right place. There's a lot of knowledge and experience here in the community. Come on in and let me say "HOoooowwwDY!"....

Here is your very own magical, mystical, mythical, mind-expanding "mega-welcome". Please take notice of the "Top 10 Common Issues", "Top 15 Tips For GS Happiness", the Carb Cleanup Series, and the Stator Papers. All of these tasks must be addressed in order to have a safe, reliable machine. This is what NOT to do: Top 10 Newbie Mistakes. Now let me roll out the welcome mat for you...



Please Click Here For Your Mega-Welcome, chock full of tips, suggestions, links to vendors, and other information. Then feel free to visit my little BikeCliff website where I've been collecting the wisdom of this generous community. Don't forget, we like pictures! Not you, your bike!

More links to helpful threads in the forum:
Help! Your Bike Won't Start
DON'T DO THESE THINGS
Help! Your Bike Won't Run Well
Oh God! Pods!


Thanks for joining us. Keep us informed.

Thank you for your indulgence,

BassCliff

[Par6]

Thanks BassCliff.
I took the carbs off last night and there are definitely no o rings in the carb rubbers I'm a bit confused as to where they fit as I've never owned a bike that had o rings there, they all just had the carb going straight into the intake rubber then secured with a clamp. Are there any pictures off these o rings in situ ? Cheers.

[Agemax]

when you pull the carbs off the head, are you left with rubber intake manifolds still bolted to the head, 4 of them, 1 for each carb. if so then unbolt these and there is a rubber o ring which fits between these manifold rubbers and the face of the head where they bolt to. these are the o rings that need replacing.

[Par6]

Ahhhh, so that's where they are, I'll remove the rubbers and see if they are there, big thanks.

[Par6]

When I drained the fuel from the drain bolts on the carbs there was slightly less fuel that came out of the carb from the non running cylinder. On removing the bowls, the tang on the floats on that carb was noticeably bent down further than the other three allowing less fuel in the chamber, maybe the reason for the stumbling firing on that cylinder ? I will clean them all anyway as the bike still wouldn't run off choke.

[Agemax]

that will probably be most of the problem, although you will still need to give them all a very good clean. when rebuilding, check and reset all the float heights to spec. this will help an awful lot.........

[Par6]

I have taken one of the intake boots off, damn those screws are on tight wish they had used bolts or Allen fasteners , and I can't see an o ring anywhere ? There is a ring of rubber that is flush with the face of the collar, is that the o ring or is that part of the rubber boot ? I have tried to lever it out but no luck.

[Steve]

I have taken one of the intake boots off, damn those screws are on tight wish they had used bolts or Allen fasteners , and I can't see an o ring anywhere ? There is a ring of rubber that is flush with the face of the collar, is that the o ring or is that part of the rubber boot ? I have tried to lever it out but no luck.

That "ring of rubber that is flush with the face" is the o-ring.

Contact cycleorings.com for a full set of o-rings for your carbs and intake boots. He also offers stainless Allen-head bolts to hold the manifolds, but you might be better off to source them locally, due to shipping costs.

.

[Par6]

Damn, those screws that hold the intake rubbers on are really tight, so much so that I've chewed up 4 of them all on the middle two cylinders
Any tips on getting them out ? Is it a case of a hacksaw and cutting a slot head into them ?
Those o ring rubbers are now circles of brittle plastic, they just snapped out in pieces guess that's what 32 years of use does, just ordered some new ones from Robinsons Foundary, he said they'll be here tomorrow
Just got to clean the carbs properly now