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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Should I change my Alloy Large Idler Gear?
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<blockquote data-quote="Tom Gaynor" data-source="post: 3906" data-attributes="member: 4034"><p><strong>Alloy idler</strong></p><p></p><p>I decided to keep mine, being persuaded by the argument that once it had run itself in, it wouldn't fill the motor with flakes of ally unless I moved it. Later, after fitting a Grosset distributor, the bike wouldn't run properly. Timing was perfect on the rear pot. I checked the front pot. Gosh! I have a 50 degree vee-twin with sparks (easy to detect with Francois's distributor) 57 degrees apart...... Francois provided me with new parts although we neither of us could see why the spruiter should be at fault. It still wasn't right so I dismantled the timing gear for a look-see. Only when I took the large idler out could I see that it had broken the inboard 3/4 of one (critically positioned) tooth. </p><p>When I dumped the alloy idler into the box of Comet bits I had, I found that I was well on the way to cornering the world market in ally idlers with one tooth missing. I have five. </p><p>So yes, change it.........</p></blockquote><p></p>
[QUOTE="Tom Gaynor, post: 3906, member: 4034"] [b]Alloy idler[/b] I decided to keep mine, being persuaded by the argument that once it had run itself in, it wouldn't fill the motor with flakes of ally unless I moved it. Later, after fitting a Grosset distributor, the bike wouldn't run properly. Timing was perfect on the rear pot. I checked the front pot. Gosh! I have a 50 degree vee-twin with sparks (easy to detect with Francois's distributor) 57 degrees apart...... Francois provided me with new parts although we neither of us could see why the spruiter should be at fault. It still wasn't right so I dismantled the timing gear for a look-see. Only when I took the large idler out could I see that it had broken the inboard 3/4 of one (critically positioned) tooth. When I dumped the alloy idler into the box of Comet bits I had, I found that I was well on the way to cornering the world market in ally idlers with one tooth missing. I have five. So yes, change it......... [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Should I change my Alloy Large Idler Gear?
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