TOPIC:

currently on #2 ex there is a 2.20mm shim and clearance shows a whopping .55mm 
so what shim would i need for achieving a clearance of .20mm

#4 in  have .30mm clearance and a 2.40 shim
I believe I'm looking for clearance to be about @ .15mm to .20mm

#3 ex has clearance of .35mm with a 2.40 shim
looking to achieve about .20mm to .25mm clearance

any help is certainly appreciated 
thanks

 

Add 2.20 plus .55 gives you 2.75 - .15 = 2.60. and so on.
Steve

If this is for a KZ900/1000 you need 0.15mm valve clearance for stock cams ( up to 0.17mm max ).
0.18mm for Unitrack cams..
Then a max of 0.20mm for race cams.
0.25mm is miles to wide.

To calculate your shim size just add the current clearance to the shim size and deduct 0.15mm.
So for #2 add 0.55 mm clearance to the 2.20mm shim = 2.75mm and deduct the 0.15mm clearance required and you get 2.60 shim needed.
255 shim for #4
260 shim for #3
 

You'll have plenty of adjustment room for years of more rides. Good job. 
Steve

i wanna thank you guys
that info really helped 
but not just for now, no no
...that was a tid bit of very handy & useful information that will last me for a lifetime
I really do appreciate all the much needed help
thank you, thank you, thank you

Thanks from me also, I'm in the process of calculating shim sizes for my 1974 Z1A.  I'm "reviving" -- it's been asleep for the last 22 years, now I'm retired and needed a project
2nd owner, I've owned it since 1977
Work done in 1981:
1015 bore kit
Andrews 1X cams
welded crankshaft

Scotty