Kolbenschmidt main bearings

[smooth]

I'm trying to determine exactly what these bearings are for. They are KS main bearings with #85381610 & KSBmU0.25 on #8 shell and #85382610 & U0.25 on the other shells. I bought them used for 0.25 1st under on the crank/std case. When I try to put #8 in the saddle its very tight, wanted to squeeze the sides together. The others seem to fit the case good but they flex more. I'm hoping they're not for a 0.25 CASE LINE BORE. My old bearings are Glyco I think-#72-2350 stamped 0.25 which ARE 1st under/std. case.
Anybody got a cross reference or info on these numbers.
Thanks in advance, Terry

[smooth]

Help! bump

[AlfonsoR]

I guess folks may not have much information on these. You may try their home page here, below on the right side of the page there is an e-mail link that might be helpful.

KSPG AG: KS Kolbenschmidt

[john walker's workshop]

mic the thickness. should be 0.25 thicker than your old ones if they are for a 1st over case.

[HawgRyder]

John...would that not be .0125 thicker owing to the pair clamping the crank?
.0125 added on each side would give .25 smaller hole.
Or did my brain go nuts?
Bob

[smooth]

First off, in my post I meant to say bearing #1-the thrust bearing.

Micing(?) the thickness won't tell me anything,yes it's 0.125 MM thicker but which way? I did talk with a guy in Calif. who had some info on KS bearings and he thinks the 'U' in the part # refers to undersize on the crank. He seem to think they would have an 'O' if they where line bore bearings.

[smooth]

Good new! I got ahold of the seller and he had them in a motor than was 0.25 on the crank with std. case. I bolted mine up and everything is on the money so those #s work.