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Sparc's GS850/1000 x4 Build

  • Thread starter Thread starter Sparc
  • Start date Start date
S

Sparc

Guest
Picked up four (yes four) GS Suzuki's today, and began a long project to build at least 2 awesome bikes out of them with a friend of mine.

We got:
1979 Suzuki GS1000E
1980 Suzuki GS1000GTL
1980 Suzuki GS850GL
1980 Suzuki GS850GT

Click images for better resolution (or try out "HoverZoom" which opens images on mouseover).


A little background:
We picked up these four non running bikes and a pile of parts in a rental truck today. Will try to get all 4 back into good condition and it may actually be possible! We are not sure which direction to head in with them but we do have fairings for one of them. Most of them are missing parts on the bike but, we have a large pile of parts that should have most of them... Neither of us has any experience with this platform but, I have been digging through the forums here, and I can already tell it will be an awesome resource.

I began the tear down on the 1980 Suzuki GS850GL today. I'm still not sure why, it may have been because it was the most complete bike, or because it had no center stand left and the other 3 did. As always, before tearing something apart it is a good plan to take lots of pictures.


Full album of before pictures here:
http://imgur.com/a/tLRu4

I started removing bits and found some good and bad things.

The frame had only surface rust, none of it seems deep. Will strip anyways to confirm. It appears to have had sidecar mounts welded to it (see far left and right of image).


The tank has a few minor dents and still has some liquid in it...
The cluster is cracked a bit but, this just appears to be the plastic shell. Hope it is repairable, or I will be hunting for a new one.
The wiring was awful, and was cut and spliced all over the place. It's a good thing I like wiring problems, as I will be making a new harness for this bike. I suppose this is a good time to pick up a better rectifier as well?

The engine has what should be corrosion inside the intake header. It was coming apart anyways. :) The transmission works, no issues there. Shaft drive spins free in neutral. The carburetors were held up with a zip tie, and freely fell off the engine once the zip tie was cut. Will have to figure out how they are suppose to be attached.

Front brakes had black fluid and no braking power at all. Rear brake worked and was stuck dragging. The rear brake lever shaft was stripped in the middle but, the rest of the splines were still engaging and not stripped. Does anyone know what would cause this?


Full teardown album from today here:
http://imgur.com/a/iasjVp

I'm sure I missed a few things to note so far. I will try to keep this log as complete as possible as these builds progress.

The next update should be a completed tear-down to the frame and maybe some engine internals.
 
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The nicest bikes in that pile are first the 79' 1000, then the 80 850GT. I'd use the 'L's for parts or a cafe project. Looks like you've got a whole winter of work there that's for sure, tons of fun. Your question about the rear brake shaft, it's supposed to be that way.
 
Sparc said:
The rear brake lever shaft was stripped in the middle but, the rest of the splines were still engaging and not stripped. Does anyone know what would cause this?
Click to expand...

That's the way they are made. It keeps the lever from falling off even if the bolt loosens up, at least until it actually falls out. They are all done that way as far as I know.
 
Good to know, thanks! Yeah, this one may end up a cafe.

I have the plastics for the E!

I'm trying to understand all of the differences between these as all of them are not in one piece for easy inspection.

I know the G is shaft drive and the L is the cruiser version.

I believe the E is just what they tacked on to the 1000 after a certain time. Or is is that the E is the air suspension?

The T after the G on the 850 and 1k is just the year code right?

This would mean that there is not much difference between the 850GL and GT, I think just a smaller tank, different seat, different bars, shorter exhaust, and maybe some styling.
 
The L, or "Ladies' Model, has a small low seat with a huge hump so you can't slide back to a man's normal riding position, tiny gas tank, a lot of chrome, little fart can mufflers, Goofy sailboat tillers for handlebars which force the young lady into a "**** up" riding position, for guys they just cause pain and a lack of control. And chrome. Lots of chrome. Overall they are almost unrideable in stock form. Use them for parts, or if you want to cut it up to make a cafe or a bobber or something.

The E is a normal motorcycle, for a normal sized rider. Nice bikes. Comfortable for the long distance, vry nice. The G is about the same as the E, only shaft drive. No need to hack them up, they are just fine as they are.
 
Greetings and Salutations!!

Greetings and Salutations!!

Hi Mr. Sparc,

Wow! You've got a ton of fun waiting for you. Let me assist you. You'll find lots of GS lovin' (850G in particular) in the links below. :dancing:

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'. :D

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


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!"....
hat1.gif


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...

carpet.jpg


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! :D

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
 
Thanks, I already used your site to find a service manual! I can't find one for the 80 GS850G though, I am using one of the 1100G's (helped to disassemble some parts). I do need to find the real manual for the GS850G, or at least one with an identical engine, as that will be cleaned and torn apart soon to check the internals, and replace some parts.

The good news so far, is I drained all the oils today, and none of them looked bad. So, the engine should be in fairly good shape.
 
You in the Seattle area? I think I saw those on the local craigslist and was tempted. :)

I am up in Snohomish and redid an 82 650G and am working on an 81 750L.

Fun bikes, easy as heck to work on.
 
Four bikes at once and you picked them up in a rental truck...........Story sounds familiar to me:-\\\
First link in my sigVVV
 
Hiya Sparc,

Welcome!

The GS850 manual is here: http://www.mtsac.edu/~cliff/storage/gs/GS850_Manual_HiRes.pdf (It's in a different spot on the page than the rest of the manuals, many people overlook it.)

If you decide to part out or cafe the 850GL, and if it happened to come with the left side cover intact, then I'd like to send some money your way.

Sounds like a nice set of projects to keep you busy for a long time. This forum is a great resource but don't forget to fully ingest all the info in BassCliff's Mega-Welcome.
 
Yeah, these were the CL bikes in Seattle.

Today's full album:
http://imgur.com/a/TA94N

The first major issue I saw, and the reason why I will always go over even a good condition used vehicle:

No, I did not pull any bolts out of the axle before taking this picture.

Thought this was funny:

The front mount that was welded on:

Rear mount:

I cut off the mounts but ran out of daylight before I could finish the grinding:

I'm debating if I should pull off the plates that were welded to the tube.

Tomorrow should be engine cleaning and at least the beginning of the engine tear down.
 
Day 3 of the teardown continues with a lot of cleaning and finally some engine guts.

Full album for the day:
http://imgur.com/a/j5MDF

I built an engine stand adapter so I could hold these GS engines on a regular engine stand.

Luke was nice enough to help me out with the building of the shop crane, engine stand, and cleaning of the very dirty motor.

Much cleaner:

No sludge is always a good sign:

A little rust in #3 and #4, will see how it looks after pistons come out and it is cleaned. Should just need a hone.

3 of the exhaust valves got a little hot, will have to clean these up.
 
How about swapping the 1000Gengine into one of the 850 frames? A little more power never hurt. Or you can also swap the internals. And you can do the taller gearing of the 1000 or short gearing of the 850 and have a fun around town bike.
Note, most of the 4-valve headers, GS750/1100E will also fit the shafty bikes. Just a rear bracket/mount on the muffler. Though the old GS1000 could be a little difficult.
And Welcome to the GSR!
Laters
Greg
 
gmansyz said:
How about swapping the 1000Gengine into one of the 850 frames? A little more power never hurt. Or you can also swap the internals. And you can do the taller gearing of the 1000 or short gearing of the 850 and have a fun around town bike.
Note, most of the 4-valve headers, GS750/1100E will also fit the shafty bikes. Just a rear bracket/mount on the muffler. Though the old GS1000 could be a little difficult.
And Welcome to the GSR!
Laters
Greg
Click to expand...

Going to leave the 850 in this bike. Chances are we will sell the first bike (after enjoying it for a bit) so we can pay for the rest. I think I am going to end up with the GS1000GTL, and I can guarantee that bike will have some performance mods done. :)

Day 4 we had the engine teardown almost completed. On day 5 we finished it.

Ordering the magnitude of parts we need soon, and sending engine parts off to be cleaned, decked, and honed. May end up painting the engine as well.

Day 4 full album:
http://imgur.com/a/Gd4hr

Started by pulling the jugs off:

Then the pistons:

We knew this was coming but it just looked so much worse out of the motor. Secondary driven gear housing and bolts:


Two of the axle bolts had fallen out and bounced around in the boot smashing into things as the axle spun. We have a replacement on the way already.
Suzuki just had to use Philips everywhere. We are going to replace these with Torx screws hopefully. Notice the two on the oil galley that were cammed out while they were installing them at the factory:

Only the stuck ones left. Had to end the day here and go get a stuck screw remover. I never had to buy one before but, I did not want to slot these with a Dremel inside of the motor.
 
Are using an impact driver on those?

That typically gets them loose.

BTW, the screws are JIS standard, not regular Phillips. The proper tool would be helpful
 
Day 5 Full Album:
http://imgur.com/a/z9AG1

Anyone know if the cam chain is oring like motorcycle chains or can I clean it with solvent?

The cam chain tensioner is a bit worn. Should this be replaced (new is $330~) or will this last another 50k+? I can measure the grove depths if needed.

Got the last stuck screws out:

Then split the cases:

 
Big T said:
Are using an impact driver on those?

That typically gets them loose.

BTW, the screws are JIS standard, not regular Phillips. The proper tool would be helpful
Click to expand...

Yes, that would have helped. :( Did not know that, thanks. I don't have an impact driver (yet) only my 1/2" drive air impact. More importantly I just had to order a set of micrometers and a dial indicator.
 
A short update:

One of the lobes on the intake cam was way under spec, will be pulling the cam from the other engine and sorting out that issue when we build the other bike.

The output side driveshaft bearing was trashed. Metal shavings and all. It seems the shavings were all contained in the axle seal as we have not located them elsewhere. Picking up a new one of these. The rest of the driveshaft appears to be fine.
 
Sparc said:
Yes, that would have helped. :( Did not know that, thanks. I don't have an impact driver (yet) only my 1/2" drive air impact. More importantly I just had to order a set of micrometers and a dial indicator.
Click to expand...

An inexpensive hand held impact driver is invaluable in getting those screws out and all the other screws too. Generally one or two whacks does the job
 
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