Valve shims

Dellortoman

Dellortoman

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Location
Tasmania, Australia
I found this Aussie shim supplier "Precision Shims Australia" while trawling the internet. http://www.precisionshims.com.au/products/lap

They list pretty much every kind of shim you could ever need (except Ducati Desmo closing shims  ::)).
They have "lash cap shims" in 7mm stem diameter to suit our Laverda triples with thicknesses ranging from 1.00mm to 5.00mmin 0.01mm increments.
Has anyone bought shims from these guys?

 
Cam, somebody mentioned those guys a few years ago when shim suppliers were being discussed. Problem with anybody's shims for 7mm Yamazukiwaki valves is that everybody except Laverda does 7mm valves that are just slightly smaller than 7 mm, the valve guides are actually bored to very close to exactly 7.0 mm. Laverda valves are ground to 7.0 mm, and the valve guides are a bit bigger. So Yamazukiwaki "lash caps" might fit Laverda valves, or they might be too tight. That's if I understood the discussion right.
The consensus at the time was just buy Laverda ones from Laverda suppliers.

Ken
 
I used them a few times, good service and shims are fine, think I've probably recommended them here myself earlier on.  From memory they make both 7.0 and 7.15mm ID lash caps and we need the 7.15 since Laverda run 7.00 stems whereas most run a 6.9x.
 
The reason I was looking was because I've been talking to AndyW who needs shims thinner than the usual Laverda range to accommodate valve recession and postpone doing a head recondition (carefully avoided saying head job  ;)).
The low end of the Precision Shims range might be useful to others who want to do this.
 
Dellortoman said:
The reason I was looking was because I've been talking to AndyW who needs shims thinner than the usual Laverda range to accommodate valve recession and postpone doing a head recondition (carefully avoided saying head job  ;)).
The low end of the Precision Shims range might be useful to others who want to do this.
Click to expand...

Im pretty sure you still said headjob

you better not fuck my gasket Andy
 
FFS
I have all the shims in any size that Andy could ever possibly want, have already sent him one full set that he asked for that proved to be still too thick
what I said to him when he ordered 1.48mm shims is that his shims are getting too thin and that once they start getting below 1.5mm thick they stand a chance of breaking up
then you have an expensive repair job on your hands
so I advised him to tip the valves by 0.50mm so he can regain some shim thickness

I never said I didn't have the thin shims in stock, have them down to 0.75mm or something stupid like that pulled out of heads we have repaired


 
Dellortoman said:
I found this Aussie shim supplier "Precision Shims Australia" while trawling the internet. http://www.precisionshims.com.au/products/lap

They list pretty much every kind of shim you could ever need (except Ducati Desmo closing shims  ::)).
They have "lash cap shims" in 7mm stem diameter to suit our Laverda triples with thicknesses ranging from 1.00mm to 5.00mmin 0.01mm increments.
Has anyone bought shims from these guys?
Click to expand...
Yep been around a while Cam ,,,,,,,, have used his shims before , all good.
 
will send you a photo if you wish if I can remember who owned the two engines that I have found broken shims in

 
I've found one broken shim, think it was a 1.17 or thereabouts - was in Mark's old Spondon in fact.  Smallest I've ever found was a 0.97, in Malc's 81 Jota IIRC.  That one was not cracked amazingly enough but it most likely hadn't been in there long.

Shims as small as 1mm are very common in some types of engine, my Yamaha FZR engine uses ~1.5mm from new in fact.  But these are generally flat shims which are ground both sides and have no stress raisers.
 
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