I dug out my shims and measured some . ProX shims are .0005 smaller than the OEM according to my measurements.
This is an interesting mystery.
Wayne
are you talking about the outside diameter, or the actual thickness' ?
just asking... I wouldn't fret the O.D. variations, nor do I really care as much about the thickness variations per se, as I always measure each and every shims thickness, and record it... and they DO differ sometimes, as much as .0003" which is substantial, thus my records, for usage and swap of positions where it may be a benefit, or a hindrance.
Looking back at my shim swap charts, using all KAWASAKI OEM shims, with markings on them... the odd measurements I recorded are thus...
4x shims marked #30, 3x were .0909" thk., ONE was .0907" thk.
4x shims marked #28, 3x were .0900" thk, ONE was .0898" thk.
6x shims marked #25, 4x were .0892" thk., ONE was .0891" thk, and ONE was .0889" thk.
now, mind you none of this was a deal breaker as far as I am concerned, as I measure everything, and also the thickness of the bucket's
heads which can vary substantially also (
from .1053" to .1071"), , so it actually offered me some benefit when working to stack up "ideal" combinations...
so, if you think about it, the buckets can vary in a range of tolerance, which actually excedes the "range" of the .0020" span between what is considered as tight, or loose spec....
this is why
when only addressing the shims, by numbers printed on them, most folks end up removing the cams 2, or even 3 times, in their "attempt" to get those magic "perfect max clearance zone" measurements.