KR crank cases

Racing K Models

KR crank cases

Postby hugoct » Sat Dec 15, 2018 9:16 am

Looking at a set of cases used on a KR. Cases used by a National Champion. Right case crankcase numbers are 555-1524 with casting number 24558-52R. Left crankcase has a KR serial number with crankcase numbers of 758-46, casting number of 24534-54R and a date code of 5.58. Any thoughts?
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Re: KR crank cases

Postby AnotherProject » Sun Dec 16, 2018 2:59 pm

Raced hard, blown, patched back together and raced again?
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Re: KR crank cases

Postby thefrenchowl » Fri Dec 21, 2018 1:44 pm

Hi Bill,

The left belly 758-46 sounds near enough like a Sportster belly, code 7 and 1958... But also fits the casting code nicely!!!

Serial 46 however sounds like race stamp, usually 2 or 3 digits with no code or date hidden within...

Are there cases Fred's?

Patrick
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Re: KR crank cases

Postby hugoct » Tue Dec 25, 2018 8:57 pm

Not Fred's.
Left case has a KR serial number, R casting number, and what appears to be a sportster crankcase machining number.
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Re: KR crank cases

Postby Simon » Tue Dec 25, 2018 9:51 pm

No help here but my 1955 KHR LHS case had a 54R casting number and belly number of 55-97.
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