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GS1000G Rebuild

  • Thread starter Thread starter Goesman
  • Start date Start date
Oh, get ready to replace everything. Don't bother with that petcock; just replace it. I would powder coat those brake calipers after you rebuild them completely. You'll probably need new pistons.
 
The old girl runs. i did a total tear down of the carbs and cleaned them. Had to do a lot of fiddling to get it to start up. Finally got it idling and adjusted the idle screws and its pretty good but not great. When i would hit the throttle it would rev up real nice then the next twist of the throttle it would bog down. My guess that's because i don't have the air box on it.

Also when it was running it seemed to have a fair bit of blow by out the vent hose.

I wasn't able to go get the parts bike this week, i am hoping for next week.
 
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No airbox = no rev. Normal for a CV carbed engine. Get a good sealed airbox on there and you'll have a better idea on what's needed. Make sure you do all the REQUIRED maintenance before you get too far ahead of yourself. Valves adjusted, carbs cleaned PROPERLY, carbs synced, fluids changed are not optional on a bike that's sat for a long time. Get everything sealed up from air cleaner to exhaust with new O-rings and seals. As others have said, the petcock on these bikes is notorious for going bad and leaking after 30 years of use. Don't rebuild it... it wont work... just pick up a new one and forget it for another 30 years.

Good luck on the new project. The bike in my sig looked pretty bad when I first picked it up. Now people ask me about it when I ride it around. Feels good to bring an old girl back to life. The next step for me is to replace the 1000G engine with a 1983 GS1100G engine I already have on hand. I've done some of the research and found that it should be a direct bolt in but, in my case, the 83 "signal generator" had to be replaced with one from an earlier year in order to use the 80 to 81 igniter.

Keep us updated on your progress. The more pictures the better!!!!

Looks to me like the instruments, front fender, handlebars and headlight bucket are from an L. The fuel tank and petcock are original for an 80-81 1000G. Same as on mine. Exhaust is an original 1000G exhaust.
 
the old bike has brakes now. Pulled the calipers all apart and cleaned them up. Pistons looked good and the seals were in great shape. Cant help but think that some one rebuilt them at one time. Got them all together and all the air out of the lines. One step closer to going down the road.

I fought with the airbox for a hour or two before finally giving up on the stupid thing. Whats the cheapest place to get new boots for the airbox?

I will get some pictures up of my progress tomorrow.
 
Carbs all cleaned up, she idles good just need to get the airbox on the thing.
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I need to get this rats nest lined out.

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Take the carbs off

Install air box

Reinstall carbs

The 850 and 1000G's are easy to do airbox install with carbs in place. Now if this were a 750 or 1100 I'd absolutely agree.
 
Good work, nice to see you getting on with it, that petcock is standard G, as has been said, but it looks like it is missing the stand pipe/strainer that goes into the tank. No big deal but it will allow crud through, as the stand pipe has a very fine mesh fo keep bits going through the system.
You also will not have an ON - RES function, as that is in the standpipe, so when you run out of gas, that is it, start pushing, no reserve, again, no biggie, just be aware of it.
Once again, nice going.

if the rubbers are good, the airbox o the 1000G is easy enough to install, it slips in behind the carbs pretty easily, no need to remove the carbs.
 
Picked up the parts bike today. A 82 GS1100G, its not in that bad of shape. I pulled the carbs and airbox and the air box fell right in place on the 1000 making me very happy. Not a bad old bike for parts for a hundred dollar bill. Its got quite a piece of scrap iron on the back of it for a rack. I also have the seat for it.

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the 1100 looks to be untouched after all these years. I have yet to find any signs of it ever being torn apart. The carbs still have the plugs in the mixture screws, it even has the little bag of tools under the seat. 23000 on the speedo. To bad it didn't come with a title.
 
Made my first ride today, around the block at least. The bike idles not to bad. It didn't really want to pull past second gear. When i started it up it was missing on one cylinder. More tuning, it will come alive.

One thing i thought was kind of strange it seemed like it wanted to pull to the right a little bit. Might just be me.

Any way im very happy to finally get a moment of seat time.
 
If you are getting pulling make sure the fork stanchions are straight and parallel. I've had issues with that in the past albeit on rental scooters that I was "fleet" mechanic on.
 
I pulled the hacked up wire harness and transplanted the harness out of the parts bike. Its nice having all the wireing where its suppose to be.

When i test rode it the other day it dies when i pulled up in front of my house and i could net get it to start after that. Today i pulled the carbs again and shot carb through all the passages real well and pulled and checked all the jets. It took some fiddling to get it to start back up. Now i have the carbs tuned as good as i can get them at the moment but its running very well. Next i am going to dig out my gauge set and sync the carbs and give it good test run.

After i am happy with how it is running it will be paint time.

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Looking like a motorcycle for sure now. Just tell that speed demon in that last pic to take it easy on her. Lol.
 
i hate winter, its to cold to get out and work on the bike. I did manage to put a few miles on it over the weekend. I made one run down the road and it ran good but it would bog around mid throttle if i cranked the throttle open then it would take off like a rocket. I am going to to pull the carbs again and order a o-ring kit for them and the intakes and some new spark plugs. i may also order new OEM jets, who knows some one could have taken a drill bit to them at some time.. then i will try again after that.
 
Nice progress, that is a cool bike you have and it's gonna be great when you're done :)

Don't forget to check your electrical system - the stator, regulator, and battery, and also your ignition coils and plug caps. These are all relatively easy tests you can perform with a VOM. Electrical testing needs to be done with a good battery (I found that out sort of the hard way), and you can use a spare container for fuel, in case your petcock isn't working right and not supplying enough fuel.

Just some ideas - I say this because I had some similar stuff go on with decent idle, a 'dead spot', and then some random bursts of power. My bike had bad plug caps and coils so I wasn't running on all 4, and I found that bypassing my tank made the bike run better.

I got a new petcock from a seller on eBay in Washington I believe, who imports and stocks Suzuki petcocks and sells them at a fair price.
 
Oh happy day, finally got some miles on the bike. Went for a 30 mile round trip today. Its running nice and smooth and pulls like a mule. to bad the weather is turning to crap for a while. I have a few more finishing touches then i will get it inspected and licensed.

Last week i filled the tank with cider vinegar and let it set for a few days. That really does wonders to a rusty tank, found a pin hole that i soldered up.

I have never used seafoam before, dumped some in the tank along with a bottle of heet and the old bike really smoothed out after some riding.

This is my first Suzuki and i must say i have fell in love with how well it runs and rides.

After getting it legal it will get some nice new shiny paint. I have a simple paint job in mind that i think will look very good.

Cant wait to get many more miles on it.
 
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