• Required reading for all forum users!!!

    Welcome!
    Register to access the full functionality of the GSResources forum. Until you register and activate your account you will not have full forum access, nor will you be able to post or reply to messages.

    A note to new registrants...
    All new forum registrations must be activated via email before you have full access to the forum.

    A Special Note about Email accounts!
    DO NOT SIGN UP USING hotmail, outlook, gmx, sbcglobal, att, bellsouth or email.com. They delete our forum signup emails.

    A note to old forum members...
    I receive numerous requests from people who can no longer log in because their accounts were deleted. As mentioned in the forum FAQ, user accounts are deleted if you haven't logged in for the past 6 months. If you can't log in, then create a new forum account. If you don't get an error message, then check your email account for an activation message. If you get a message stating that the email address is already in use, then your account still exists so follow the instructions in the forum FAQ for resetting your password.

    Have you forgotten your password or have a new email address? Then read the forum FAQ for details on how to reset it.

    Any email requests for "can't log in anymore" problems or "lost my password" problems will be deleted. Read the forum FAQ and follow the instructions there - that's what we have one for...

  • Returning Visitors

    If you are a returning visitor who never received your confirmation email, then odds are your email provider is blockinig emails from our server. The only thing that can be done to get around this is you will have to try creating another forum account using an email address from another domain.

    If you are a returning visitor to the forum and can't log in using your old forum name and password but used to be able to then chances are your account is deleted. Purges of the databases are done regularly. You will have to create a new forum account and you should be all set.

Gs850 valve shim

hadaveha

hadaveha

Forum Apprentice
I'm working on adjusting my valves on my new to me 1978 Gs850, I have checked them a couple times and I practically have no clearance on any of my valves, the smallest blade I have on my Gage's is .026mm. And I can't get that to slide through. So my question is being that I have no clearance should I buy shims 2 sizes down instead of one
 
First of all, where did you find a '78 850? They were not released until the '79 model year.

OK, you might have one of the early ones that was ASSEMBLED in '78, but it's still a '79 bike.

Concerning valve clearance: you can't order anything until you know what you have. Inventory your shims. Remove ONE shim, record its size and location, put it back. Remove the next shim, record its size and location, put it back. Repeat until all are recorded AND PUT BACK. DO NOT ROTATE THE ENGINE UNLESS ALL SHIMS ARE IN PLACE.

Now that you know what you have, take the thinnest one out, put a quarter in its place, move the thinnest one to the other locations that had shims thicker than that. If you can now measure clearance, you might have extra, but it's easy to determine how MUCH extra and order the correct shim. If you are lucky, you might only have to guess on a couple of shims.

Now for two things that will help you considerably:
1. Take advantage of the offer in my sig.
spointing_down_right-hand_100-100.gif
The spreadsheet will help you with your shim inventory and the math necessary to determine what shim you need. It also has a page that is a handy service log.
2. Take advantage of the GSR Shim Club.
spointing_left_100-101.gif
Click the link, you will be taken to a thread that will give you some more information on how 'the Club' works. One of the best parts of that is that you can order some extra shims in varying sizes where you might have to guess at what you need, just send the extras back, along with the ones you removed from your engine.

3. Do you have a factory service manual? Go to our library (also known as "BassCliff's website") and get one.

4. Follow the procedure for valve adjustment CAREFULLY, it's easy to mis-read it, but the factory manual does it best. And, as good as the manual is, there is a tutorial in the library that shows the procedure with better pictures than the manual.

5. Be sure to ask questions if you don't understand something fully.

.
 
ok I finally had a chance to get all the shims out and catalogue them I have pretty much no clearance and my shims are I'm calling the side with the gear shift number 1 #1 ex.265 intake .275 #2 ex.265 intake .260 #3 ex .260 intake .255 #4 ex.265 intake .265 and I know I'm way to new to be giving advice but when you put the shim back in place and you reach over the bike to turn the engine over, and your face is kind of down close to the cams you might want to have your mouth closed when the shim spits the oil out of the buckett
 
hadaveha said:
I know I'm way to new to be giving advice but when you put the shim back in place and you reach over the bike to turn the engine over, and your face is kind of down close to the cams you might want to have your mouth closed when the shim spits the oil out of the buckett
Click to expand...

I love those little lessons.
 
..Yummy....I walk around the bike to turn the engine..but I have been splattered...

The biggest thing I had to learn (the hard way after doing 3 shim measurement processes) was to be sure the lobs are in the correct position.

Even if you think they are in the correct position - double check it or get a false reading ... :chargrined:

If you do it wrong -- (like I did) you get to do it again..and again..and again...
 
Well the lessons keep coming basically my bike was running great before I decided to check the valves, So I adjusted the valves replaced 6 shims, got everything button back up and no she won't run unless I have the choke on seems to be idling really low. Should they s happen after a valve adjustment
 
Some "choke" is normal, when the engine is cold.

Idling low? Turn the idle adjuster screw in. After the bike is warmed up, of course.

.
 
You must log in or register to reply here.

Similar threads

R
Valve clearance questions
Replies
9
Views
312
Steve
Steve
crazyramen
Low Compression in 3 Cylinders 100 Miles After Rebuild
Replies
16
Views
332
rphillips
R
P
1983 gs850G valve cover breather
Replies
5
Views
126
Burque73
Burque73
S
#3 cylinder pipe cold and oil leaking from #3 cylinder
2
Replies
25
Views
299
suziman
S
D
Valve Shim Quality
Replies
3
Views
160
bwringer
bwringer
Back
Top