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1Back to top Go down    Valve shim calculation on Wed Oct 31, 2018 4:41 pm

BooG

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Can someone who is smart (?) go over the calculation for measuring shim size to obtain correct clearances at the valves? I've read a lot of posts, and looked at vids, but apart from that bloke who says, "If they're loose....leave em the f+*k alone...", (and he doesn't really explain how you calculate a replacement shim size) I'm not sure about the actual maths of it.
Embarassed

    

2Back to top Go down    Re: Valve shim calculation on Wed Oct 31, 2018 5:07 pm

nobbylon

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measure the actual clearance.
If too large subtract required clearance from your measurement and add that to the thickness of your already installed shim to give new shim thickness required.

If too small, subtract your measured clearance from required clearance and subtract that amount from installed shim to give required shim thickness.


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R1100GS Feb 1995
K100RS July 1989
K100 Dec 1983
R90s June 1975
R75/6 Feb 1976
F650GD May 2001
    

3Back to top Go down    Re: Valve shim calculation on Fri Nov 02, 2018 11:26 am

Crazy Frog

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Here is a excellent Excel spreadsheet which automatically calculate the thickness of the shims needed.
You have to enter the current thickness of the shim, and the gap between the shim and the camshaft.
There is even a list of part numbers for new shims.

http://forum.kforum-tech.com/members-upload/uploads/Valves-adjustment.xls


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1986 k75, 1985 K100rt, 1985 K100rt/EML sidecar.
    

4Back to top Go down    shims spreadsheet on Fri Nov 02, 2018 11:38 am

brickrider2

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Hummm. I can't make that link work.
Oops. My bad. I've got it now. Nice piece of work for those of us who like to do our own wrenching whenever possible. Thanks!


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1996 K1100LT
    

5Back to top Go down    Re: Valve shim calculation on Fri Nov 02, 2018 11:47 am

Crazy Frog

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@brickrider2 wrote:Hummm. I can't make that link work.
It works, but you have to download the file on your computer.
Then, you have to have Excel installed on your computer.
If you don't, you can download a free viewer. You will be able to enter your measurements but you cannot save the changes.

https://xlsx-viewer.en.softonic.com/?ex=DSK-1052.1


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1986 k75, 1985 K100rt, 1985 K100rt/EML sidecar.
    

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