Pulled the carbs off the 81 850G today.

[sinkankan]

Some photos of my carbs on the 1981 GS850 after they were rebuilt. Had some bling applied becuase I couldn't rationlize putting back on the cruddy spreader bars so I got them chromed. One thing I always had problems with was trying to get the front clamps to hold the carbies and stop any small air leaks, in the end I used radiator clamps for a positive clamp. Hope these inspire.

[jdvorchak]

Those look really nice. I pulled the 1st carb out of the chem-dip after about 7 hours and it's clean but not new looking like yours. Put the second one in and letting it soak overnight. I'll post some pics of before and after but frankly I'm more concerned with how they run rather than how they look. I'm not doing a resto just getting the bike safe and reliable to ride. I may take some time to polish the CV caps so they look pretty. I can only put one carb in the dip at a time. I still have plenty to do while the carbs are soaking. Working on the air cleaner now. I have to replace the foam seal on the air filter frame and probably should post pics of that. I just use weather strip foam like you get at the hardware store.
Plenty of other stuff like lube throttle and clutch cables, speedo and tach cables and the brakes. Rear brake works while front MC is empty and dirty. etc etc.. the list goes on. Basically all of the maintenance that should have been done over the past dozen years.

[sinkankan]

They were vapour blasted, but unfortunately the guy didn't flush them before he reassembld them. Had a lot of drama afterwards pulling them apart again and blowing out soda ash. They come up looking shiney and new afterwards because it take all the surface grud off, both inside and out. I buffed the diaprahm caps quickly on the bench grinder, took about twenty minutes each one.
And like yourself I did th brakes while I was waiting, that turned into another drama because all the calipers were seized, the master cylinder for the rear was a dead loss and ended up in the bin. The front were seized with rust and moisture and I got a new right hand one, and refurbished the left one.

[jdvorchak]

Sinkankan bike looks really good. I never seem to have the fortitude to do a frame off resto like yours. I clean up frame parts etc as I'm working on the bike so at least I don't get all funky just touching it. Ok I'm done in the house. Going out to the garage to work on the bike. When I finish with this one I have a 1980 GS850L waiting in line to get running. Unless someone buys the L it it's present state for cheap.

[jdvorchak]

here is kinda before and after: The cleaned carb is the first on the left in the original picture.

Original:


After about 7 hours of chem-dip;

[azr]

how come you didn't take out the pilot jet, the main jet and it's tube and the float seat?

[jdvorchak]

I did. I took the picture after I put all that back in. They were completely stripped down to the bare carb body and all jets, seats etc pulled for soaking. Wouldn't do much good to leave all of that in there for the dip...

[jdvorchak]

With just a few minutes of first clean with 0000 steel wool and some Mothers Metal Polish and I'm pleased with the way the caps and bowls turned out.



Before:

[mikerophone]

Looking good - let's see if you can get the bodies that clean! Love the Mothers, and Chuck Hahn here turned me on to something even better to finish it off - Wizards Power Seal, it creates a molecular acrylic barrier to keep that polish looking great.

[jdvorchak]

Oh one more observation. I pulled the insulators off to change the O-rings and to my surprise they were still pliable, round and still standing proud of the surface. I changed them anyway because I had the new ones.

I saw another discussion on the forum about how often to change those O-rings and the popular conscientious was about 10 years. I don't know how long this one has set before I bought it. I was estimating 10 to 12 years.

Another observation. I thought maybe someone had rebuilt these carbs then didn't ride it much and let it sit. Well everyone of the floats were the same setting but it was incorrect. They had 22.4 mm from the gasket base to the flat part of the float. I had to bend the hell out of the tabs to get them back to correct. Now they way they were set the fuel level would have way too high. Probably running a little rich too.

[jdvorchak]

Looking good - let's see if you can get the bodies that clean! Love the Mothers, and Chuck Hahn here turned me on to something even better to finish it off - Wizards Power Seal, it creates a molecular acrylic barrier to keep that polish looking great.

Not as nice as yours but not bad. I'll post some pics later. I'm off to my sisters house for Christmas Dinner so maybe tomorrow.

[jdvorchak]

As promised:

[mikerophone]

Nice! They look pretty good, and more importantly, the internals are clean.

While the rack is still off the bike, I'd highly recommend replacing those old JIS screws with metric SS allen head screws, not only looks good but so much easier to get out.

Here's a set on eBay, starting bid is 8.99 + 1.99 shipping, I buy them locally at a nut and bolt supply for about $14.

At the very minimum, replace the ones on the intake boots with SS.

[jdvorchak]

I already replaced the O-rings on the boots and intake boot screws with SS Allen heads. As for the screws on the carbs I used Anti-Seize on all screws. I have a pretty good set of JIS screwdrivers and rarely mess up a screw. Those that are messed up before I get the bike I'll replace with new ones. Local Honda dealer sells them to me for about 30 cents each. Not SS but good plated screws. Also have gone to the local Ace Hardware and gotten metric screws pretty cheap. Like 15 to 25 cents for M4 and M5 screws.

I've been using this screwdriver set from Harbor Freight for years and really like the way they fit JIS screws. They don't say JIS but they sure fit like JIS. The middle size slot screwdriver fits the pilot jets perfectly and the large size slot perfectly fits the main jets:

http://www.harborfreight.com/32-piece-screwdriver-set-90764.html

Allways catch them on sale for $6 ..

[mikerophone]

Perfect - I'll have to pick that set up, I've passed it many times, without really giving it a second look, always nice to have feedback from a GSR member on anything like that.

I'd like to buy the JIS set that GSR user gofastengineering manufactures, but these may get me by until then.

Antiseize and good screwdrivers will be fine, most of my bikes come with stripped screws, so I've just replaced them all with Allen/hex bolts. Wish the Ace hardware stores near me had metric SS screws, the Lowe's near me doesn't have much anymore either.