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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Catastrophic camshaft and follower failure - any ideas?
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<blockquote data-quote="Tom Gaynor" data-source="post: 5558" data-attributes="member: 4034"><p><strong>Worn cams and cam followers</strong></p><p></p><p>Much time and money has been spent improving the lubrication on Sunbeam S7 and S8 motors because cams and rockers wore horrendously. Mine did. I replaced them, without altering the lubrication system, at about 13,000 miles. They're perfect, at over 33,000 miles. It's generally accepted now that (some of?) the original factory parts were deficient in the hardening department, and that BSA were a bit backwards at coming forwards to admit it. My guess is that yours are (were) too.</p><p>I bought "105" cams from Gary Robinson. I knew enough to send him the cam followers too. Last time I looked, about 3000 miles on, they were still perfect.</p></blockquote><p></p>
[QUOTE="Tom Gaynor, post: 5558, member: 4034"] [b]Worn cams and cam followers[/b] Much time and money has been spent improving the lubrication on Sunbeam S7 and S8 motors because cams and rockers wore horrendously. Mine did. I replaced them, without altering the lubrication system, at about 13,000 miles. They're perfect, at over 33,000 miles. It's generally accepted now that (some of?) the original factory parts were deficient in the hardening department, and that BSA were a bit backwards at coming forwards to admit it. My guess is that yours are (were) too. I bought "105" cams from Gary Robinson. I knew enough to send him the cam followers too. Last time I looked, about 3000 miles on, they were still perfect. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Catastrophic camshaft and follower failure - any ideas?
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