Vintage Kohler engine

#1
Hello all.
Does anyone know anything about 1960’s vintage Kohler engines.
I believe it’s a K-90. Four stroke with a carter carb and a funny looking encapsulated centrifugal clutch.
It’s on an old kart.
Are they desirable?
Are parts available anymore?
Were they used on karts from the 1960’s era?

thanks,
Rob
 
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