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Cant read shim number

  • Thread starter Thread starter rockhammer
  • Start date Start date
R

rockhammer

Guest
Hello

I am adjusting clearance and I pulled one shim that I cannot read the number on. I do have calipers and it reads 11.74 mm thick. Does any one know what shim size this would equal?
 
Never trust the number, even if present. You need to check them with a micrometer, not a caliper.
 
Dial caliper OR a mic are acceptable measuring devices. I have dial calipers with SAE and Metric scale.
 
rockhammer said:
Hello

I am adjusting clearance and I pulled one shim that I cannot read the number on. I do have calipers and it reads 11.74 mm thick. Does any one know what shim size this would equal?
Click to expand...

That's way too thick. The shim sizes are just the thickness, usually like 2.65mm or so. I think the thinnest are just over 2mm and the thickest are about 2.9mm? Not sure.

11.74 is almost half an inch thick.
 
A 2.67 would be labelled as a 2.65x

I would also like to make sure you notice the invitation in my signature.

.
 
All I have is calipers

#1 intake .03 shim 2.5x
exhaust .02 shim 2.7
#2 intake .02 shim 2.6
exhaust .02 shim 2.67
#3 intake .02 shim 2.57
exhaust .02 shim 2.51
#4 intake .03 shim 2.65
exhaust .02 shim 2.47

all these .02 could not even fit the .02 shim.

I am trying to figure out which shims sizes I need.
 
Steve said:
A 2.67 would be labelled as a 2.65x

I would also like to make sure you notice the invitation in my signature.

.
Click to expand...

Those odd numbers were the measurement with cailpers. round up would be the actual number.
 
I have the manual with the spread sheet but I do not understand exactly how they are doing the math. I know it is probably very easy but my mind cant get it right now.
 
tkent02 said:
Can lead a horse someplace, how does that go?
Click to expand...

Yea I know. This is all new to me. So far I think I have done well being that I have never worked on a motorcycle before. Now I sent steve a email request I think that is what you were referring too. :confused::confused:
 
I found a calculation online goes like this

a=(b-c)+d

a=new shim
b= clearance
c= spec
d= current shim

My question is what number should I put in spec since it is a range I am putting in .05. Would this work?
 
If a .02mm shim wont fit then you need to go down at lease 1 shim size. It could be two sizes but only if the shim gap is really less then 0. If you can rotate the shim then one size should do it. I purchased a shim that was less then any one needed so that I could use it as a reference. Using that shim allowed me to measure the real gap on the really tight shims.
 
The equation worked great. I completed the project and the bike is running much better.
 
Last edited:
rockhammer said:
Those odd numbers were the measurement with cailpers. round up would be the actual number.
Click to expand...
Yup. While calipers show a fairly realistic number, a mike will show a more true number. Overall, however, the number when the new shim is installed and the number is measured will tell all.
 
rockhammer said:
Now I sent steve a email request I think that is what you were referring too. :confused::confused:
Click to expand...
Yes, he sent me a request, then mentioned that he found an on-line calculation and told me that he didn't need it.
icon_shrug.gif


So much for thirsty horses. :-\\\

.
 
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