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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
help to determine authenticity and value of 1017 cases
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<blockquote data-quote="chankly bore" data-source="post: 36222" data-attributes="member: 317"><p>I agree with Peter. I had set of H.R.D. crankcases F10AB/1B/23## that had an identical style of engine number. As well as measuring the mainbearing registers you might as well go completely septic and check the crankcase mating surfaces and the roundness of the cylinder bore holes. The mechanical miscreant that had my 'cases decided to skim .030" off the driveside jointing face to get an oil-tight motor!!! Think about how many problems this causes, folks. Just warning you, a lot can happen to a lump of metal in 60 years. By the way,if you are thinking about NEW 'cases instead they can have wrong tolerance (too tight) bearing registers and oil pump bores that are deviant.So its Hobson's Choice as we say out here in the Colonies.</p></blockquote><p></p>
[QUOTE="chankly bore, post: 36222, member: 317"] I agree with Peter. I had set of H.R.D. crankcases F10AB/1B/23## that had an identical style of engine number. As well as measuring the mainbearing registers you might as well go completely septic and check the crankcase mating surfaces and the roundness of the cylinder bore holes. The mechanical miscreant that had my 'cases decided to skim .030" off the driveside jointing face to get an oil-tight motor!!! Think about how many problems this causes, folks. Just warning you, a lot can happen to a lump of metal in 60 years. By the way,if you are thinking about NEW 'cases instead they can have wrong tolerance (too tight) bearing registers and oil pump bores that are deviant.So its Hobson's Choice as we say out here in the Colonies. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
help to determine authenticity and value of 1017 cases
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