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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Chain Rings and Chain Length
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<blockquote data-quote="davidd" data-source="post: 34090" data-attributes="member: 1177"><p>Martyn,</p><p></p><p>My racer may be too different regarding its setup as I run a 21T CS and I am using the short RFM, but I would think the relative differences would prove useful. I cannot safely change two teeth without changing the chain. Thus, I run a 106 link chain for the 46T, a 108 link for the 48T and 110 link for the 50T. Almost all the tracks I race can be done with the 50T and 52T except Miller in Utah where a 54T would be best. I am also red lining at 7000 RPM and you are probably sticking to 6000.</p><p></p><p>I can give you the speeds in each gear for each sprocket at various RPM, but if you are interested, you might as well input your own data and know for certain. It is an Excel spread sheet that has the calculations embeded in the cells. If you (or anyone else) wants a copy, write me at <a href="mailto:daviddunfey@hotmail.com">daviddunfey@hotmail.com</a>.</p><p></p><p>I have the feeling that it is too much of a spread and that you will not be able to utilise the power well in 4th with the 46T on the street. If you are always starting and ending at home for the change, just use two chains. If you expect to change mid-trip I think you will have to tighten the spread.</p><p></p><p>David</p></blockquote><p></p>
[QUOTE="davidd, post: 34090, member: 1177"] Martyn, My racer may be too different regarding its setup as I run a 21T CS and I am using the short RFM, but I would think the relative differences would prove useful. I cannot safely change two teeth without changing the chain. Thus, I run a 106 link chain for the 46T, a 108 link for the 48T and 110 link for the 50T. Almost all the tracks I race can be done with the 50T and 52T except Miller in Utah where a 54T would be best. I am also red lining at 7000 RPM and you are probably sticking to 6000. I can give you the speeds in each gear for each sprocket at various RPM, but if you are interested, you might as well input your own data and know for certain. It is an Excel spread sheet that has the calculations embeded in the cells. If you (or anyone else) wants a copy, write me at [email]daviddunfey@hotmail.com[/email]. I have the feeling that it is too much of a spread and that you will not be able to utilise the power well in 4th with the 46T on the street. If you are always starting and ending at home for the change, just use two chains. If you expect to change mid-trip I think you will have to tighten the spread. David [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Chain Rings and Chain Length
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