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GS850G project

Joined
Oct 25, 2010
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HUNT COUNTY
So I'm a member on a local motorcycle facebook group. The vast majority of the group are sportbike and cruiser riders, but there's a few of us on different stuff. A guy recently posted up that he had two bikes he wanted to get rid of for 500 dollars for the set. I really don't have room for 2 more bikes in my shop right now and didn't need to spend 500 dollars either but 250 I could. I found someone who was interested in going in halves with me. He wanted the CB I wanted the GS. Worked out well :rider:

The two bikes were a 1978 CB750 and the other is a 82 GS850G, well maybe, all he has is action sale paperwork, no title (the Honda has a title), the build date on the vin tag for the GS850 shows October 1981. I was expecting to find complete basket cases but they both appear to be nearly completely intact. The 850 is for sure missing one side cover and the seat pan has obviously seen better days. The tank is also quite rusty so that will need to be dealt with and I'm sure the carbs are full of varnish and gunk. But I couldn't turn it down for 250 dollars. The 750 looks like it might be in slightly better shape other than the very rusted head pipes. I turned the motor over with the kick starter and it turned fine and seemed to have good compression. I wasn't able to turn the GS over since I forgot my extra battery at the house, so for all I know it could be locked up.

The 850

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The Honda

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Joined
Oct 4, 2009
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Harmaston, TX
The Honda is faster, it goes 130 mph, The Suzuki tops out at 85 mph, LOL

I hated that speedo, I bought a '79 GS750EN brand new. First year for 85 mph speedo and last year with a kick starter. I miss that bike, kept it for 20 years and was my sole transportation for many years.
 
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Maybe. just got it in the garage today. Teardown starts in a week or two. Looks like most of it is going to be cleaning. Then gas tank rust and a full carb cleaning.
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Joined
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Something has been gnawing on it. Same for some of the wiring as well. :/

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The ones I've seen on the gs resources forum go for 75-100. They apparently aren't super desirable. If the bike is salvageable I'm keeping it on there

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SL350

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It's good that the price was so low. That's what barn finds should go for if there is any chance of getting them on the road again. It takes a lot of time and money for tires, chains, carb kits and I see too many bikes with a starting point too high to get it done. Those bikes just get parted out.

I love old bikes but feared the 4 carb setups. Wish you the best with the GS rebuild as they are around the world bikes.
 
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I think my two biggest mechanical hurdles assuming I've got good compression, is going to be the carbs and rusty gas tank. Once I know it runs and goes finding some of the plastic pieces is going to be a chore. The rear cowling is busted from the tabsip front and its missing one side cover.

Not sure how I'm going to do up the tank. I've found everything from use washers and a gallon of wd40 to the por15 kit to filling the tank with metal rescue rust remover. But st 25 dollars a gallon that would get pricey.

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mitchntx

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Had a VTX with similar tank issues.

I used Dawn and hot water with a scrubby brush to get as much crud out as I could.
Soaked and rinsed for days using MEK from home depot.
More dawn and scrubbing and more MEK
It didn't get it spotless, but got it cleaned up.
A sonic cleaner will fix up the carbs and petcock.

I would also replace the carb boots. Even when a couple years old, heat cycles made them crack.

Typically a lot of bits and pieces can be had on eBay. I've replaced many non-original parts on my Honda doing just that.

also, there is a member on ADVRider that goes by sparklingdogg that has a salvage business and is very reasonable. He's a carb guy. Look in the Old's Cool section under Bikes.
 
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Those old Windjammers were great. But they look so strange now just because of their sheer size. Still, like you, I'd leave it on; it's a period piece. I had one on the CB650 I bought 10 years ago to get back into riding.
 
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Any suggestions on a sonic cleaner large en oui gh for a rack of carbs?

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Either that or I'm going to send them to Weird George down in the hill country. He redid the carbs on my GS1000 after I had struggled with them for so long and even today more than a decade later they're great

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I rearranged bit and didn't have to put the mower out in the outside shed. I can still fit another bike in there if I can sneak it by Rachel lol.
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sKatZ

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I rearranged bit and didn't have to put the mower out in the outside shed. I can still fit another bike in there if I can sneak it by Rachel lol.

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:rofl::rofl::rofl:

(Logic argument: Need one bike for each family member + spare for when one isn't running)
 
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Joined
Oct 22, 2013
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san marcos TX
also soaking the carbs in 50% pine sol and 50% water over night will make a difference but take of the rubber slider things in it. you would fill a container with the cleaning liquid and submerge the carb bank. May be simple green works too?
 
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you take of the fuel bowls all the needles and fuel screws, the rubber slider covers on top and soak all that too.
 
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Work has begun. Removed the tank front fender and windjammer. Washing all the parts as they come off. Most look in good shape integrity wise but the tank and fender are going to need new paint. The tail fairing has broken off at the forward tabs but I've seen a few on Ebay. I'll need a left hand frame cover as well which I've also seen on Ebay.

I did hook a battery up and the bike cranks and sounds like it has good compression but my compression tester is currently MIA.

Can't wait to keep going on it :)

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sKatZ

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And you have the good help on hand to speed progress. Maybe she knows where that compression meter is.
 
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Got the new battery in from Amazon and got it on maintenance mode now after the initial charge. And put 5 and a half gallons of vinegar into the fuel tank to hopefully clean up some of the rust.

Zippo has a dog agility thing this weekend so I'll be on kid dooty and don't forsee getting anything done on the bike this weekend. I would like to get the carbs off at the very least.
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Depends on who you ask. General consensus seems to be 1-4 days. I put it in at 5 yesterday I'll dump it sometime Sunday.

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Ha we got enough fire ants to go around.

Pic makes it look better than it is. Needs some TLC and in the end will probably get new paint.
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Tank off and devingarized. Derusted too. Man tha stuff worked like a champ. No leaks that i could find. Flushed and shook with water a few times which knocked the rest loose. Tank looks great. Got a tiny bit of flash rusting before I was able to run a bit of running alcohol through an fog as best i could with wd40. Got the shop vac blowing air into it now to hopefully dehumidfy it some more.

Also got the carbs off and partially torn down. They're not as bad as I thought but I still may send them to weird George down in the hill country. He rebuilt my gs1000 vm26 carbs about 15years ago or so and they've been flawless. But that's going to hurt the ol pocketbook.

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SL350

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Those were exceptionally clean carbs for a barn find.

What usually is a problem for me with old carbs is the needle pin that shut off the gas when the float rises. No matter how clean they get and how good they look, they always seem to fail for me.

With four floats there is a good likelyhood that one of them leaks. Can you remove them and test them and look for bubbles?

I keep telling myself to stay away from projects like this but when I see posts like yours I kick myself and wish I had.

Good luck and I am watching from Mesquite. I only know singles and twins but any help I can offer, let me know.
 
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That was after about 16 total hours of soaking in the carb dip. 3-4 hours at a time for each carb or set of parts for the carb. I don't know what it is about Suzuki and their fuel valves. The Vacuum valves always fail and the needles simply don't have enough "oomph" to seal off the head pressure coming down the line from the tank. Even brand new needles and seats will not fully seal if you have a leaky/faulty fuel valve.

That's why I went to a Pingel valve on my GS1000. I'm giving an OEM replacement a shot on my GS850 but I'm not holding my breath on if it will work. Or will last. IT's not a matter of if but when a Suzuki vacuum valve will fail.
 
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No sir not currently. Currently waiting to check valves. Just been really busy with kids and work and it's so hot and humid what free time I do have I tend to retreat Into the AC

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Getting the bug to tinker with the GS850G again. Finally got the carbs reassembled. Need to order the proper feeler gauges for the valve check. Once the valve check is done I can get the carbs back in and make sure shes a runner then move on to rebuilding the brakes and cleaning up the electrical system.
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Joined
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That was after about 16 total hours of soaking in the carb dip. 3-4 hours at a time for each carb or set of parts for the carb. I don't know what it is about Suzuki and their fuel valves. The Vacuum valves always fail and the needles simply don't have enough "oomph" to seal off the head pressure coming down the line from the tank. Even brand new needles and seats will not fully seal if you have a leaky/faulty fuel valve.

That's why I went to a Pingel valve on my GS1000. I'm giving an OEM replacement a shot on my GS850 but I'm not holding my breath on if it will work. Or will last. IT's not a matter of if but when a Suzuki vacuum valve will fail.
Many GS owners go with a manual fuel valve. The pingel is great, but you can make the stock valve manual too. Take it apart and get to the barrel which actually selects the fuel pathways (easy) and fill the "Prime" hole with JB weld. Also block off the vacuum port with a cap, or more jb weld, and remove all the vacuum valve stuff. Use RTV as a gasket to reassemble, since the vacuum diaphragm is now gone.

Then when reassembled, "Prime" becomes "off". You'll no longer need the prime spot since the fuel will just flow when it's in on or reserve. No more vacuum valve to fail.
 
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Never thought of doing that. When this one fails I'll give that a shot.

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Pulled the rear end apart. Swing arm moves very smoothly with no play in the pivot so I left it in place. Going to take a wire wheel to the rust and re spray as needed. The rear master cylinder is frozen so I'll be tearing that and the caliper down for a rebuild.

Slowly working my way forward.

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Tore the 850g down some more the rear brake pedal pivot was frozen in the frame. Took a bit with penetrating oil a propane torch and a BFH to get it out.

Pulled all the master cylinders and calipers off and dissassembled. All were full of sludge. Need to rebuild or replace them all. I found a bunch of new master cylinders on Amazon for less than the cost of the rebuild kits ive been finding. Weird.

Put a new tach cable on the GS1000 and loaded the Strom in prep for Rich mountain Rendezvous.

Got the bonded title paperwork back from the state as well for the GS850G so gotta go get surety bond soon and get over to the tax office.

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focus frenzy

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those use BIG tapered roller bearings for the swing arm, super tough over engineered and probably the easiest swing arm bearing to service but possibly hardest to change as getting the seat race out of the swing arm can be fun.
 
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Downs, I didn't realize you had started a thread over here.

I took on the CB. Here she is finished and running.

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those use BIG tapered roller bearings for the swing arm, super tough over engineered and probably the easiest swing arm bearing to service but possibly hardest to change as getting the seat race out of the swing arm can be fun.
Oh I got them out of there when I had to pull the swing arm to replace the mid drive rear seal. Very easy to service for sure.


Sparkplug I want to hear it run :) Looks great considering where it started. I'm currently waiting on the rest of my brake parts to come in, I should soon have everything I need to put it on the street and moving around. I got my bonded title paperwork back from the state last week and need to go get a surety bond. The part at the tax office is going to suck cause I'm going to have to pay more taxes on it than I paid for it in the first place, since it's older than 25 years old it's automatically valued at 4 grand even though their own SPV calculator shows a 185 dollar value :giveup: Buncha crooks.
 
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