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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Chopped Cases
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<blockquote data-quote="greg brillus" data-source="post: 165750" data-attributes="member: 597"><p>I have one here that was bad like that....... I think it had been repaired quite badly and it was full of cracks (from previous welding mostly).......We machined the whole area out and made up a complete new bearing insert, fully welded in........just needs the final line boring to align the drive side to the timing side acurately.......this is done in a CNC mill.......A lot of chopped cases I've seen here are in a terrible state.......most all have been raced and blown up somehow........they are precious now, but back then no one gave a damn really. To find good chopped cases is unrealistic now I feel.......There is an opening for someone to make up newly manufactured ones and add some extra lugs at the rear to attach the engine/ gearbox plates to....... Of the 3 sets of chopped cases i have here, 2 of them are in a bad way, the third one was the lucky one.</p></blockquote><p></p>
[QUOTE="greg brillus, post: 165750, member: 597"] I have one here that was bad like that....... I think it had been repaired quite badly and it was full of cracks (from previous welding mostly).......We machined the whole area out and made up a complete new bearing insert, fully welded in........just needs the final line boring to align the drive side to the timing side acurately.......this is done in a CNC mill.......A lot of chopped cases I've seen here are in a terrible state.......most all have been raced and blown up somehow........they are precious now, but back then no one gave a damn really. To find good chopped cases is unrealistic now I feel.......There is an opening for someone to make up newly manufactured ones and add some extra lugs at the rear to attach the engine/ gearbox plates to....... Of the 3 sets of chopped cases i have here, 2 of them are in a bad way, the third one was the lucky one. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Chopped Cases
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