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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Alloy Idler Gear
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<blockquote data-quote="Tom Gaynor" data-source="post: 14239" data-attributes="member: 4034"><p>My Shadow was built February 1951, had an alloy idler. It failed by losing most of a tooth, by chance exactly at 34 BTDC on the front pot with the marks aligned. For a few minutes (I was checking timing) I thought I had a 55 degree vee-twin...</p><p>The other five alloy idlers I subsequently found in a box, with five clapped out ATD's among other things, had each lost a tooth. Which I think tells anyone all they need to know about the wisdom of replacing alloy idlers with steel, and Lucas ATD's with one of the better made alternatives.</p></blockquote><p></p>
[QUOTE="Tom Gaynor, post: 14239, member: 4034"] My Shadow was built February 1951, had an alloy idler. It failed by losing most of a tooth, by chance exactly at 34 BTDC on the front pot with the marks aligned. For a few minutes (I was checking timing) I thought I had a 55 degree vee-twin... The other five alloy idlers I subsequently found in a box, with five clapped out ATD's among other things, had each lost a tooth. Which I think tells anyone all they need to know about the wisdom of replacing alloy idlers with steel, and Lucas ATD's with one of the better made alternatives. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Alloy Idler Gear
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