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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Comet Top End Speed
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<blockquote data-quote="Little Honda" data-source="post: 50219" data-attributes="member: 667"><p>Hi, genedn,</p><p>my Comet achieved 125kph max with 48teeth-sprocket. This was a value of a NSU-Max in the 1950ies, and not equivalent for a 500, as I remembered. So, set valves and ignition correctly (MKII-cams) and added 50teeth-sprocket which cured my problem: 142kph max.!</p><p>Admittedly, lying flat on the bike in tight leathers, and only once for test purpose. Thank god, that nobody could see, who it was!</p><p>I used a bycycle-digital speedo which stores max. values. I noted max. speeds in every gear, to observe, that it reached max. rpm in</p><p>1st to 3rd, but not in fourth. In Paul Richardson´s book you can find the gear ratios to find out, that with stock sprockets, the engine</p><p>will settle at 4800rpm only for 125kph, as it is around 20- 22hp with the comet engine. For 90mph you must at least have 28hp, ie. full rpm, with a bike as large and heavy, as a Comet!</p><p>I wanted to see 90mph, as my friend´s Falcone does 125kph with a sidecar fitted!</p><p>Now I am happy at 60 - 70mph for hours, if needed, and it´s real fun on twisty roads!</p><p>keep smiling!</p><p>Michael</p></blockquote><p></p>
[QUOTE="Little Honda, post: 50219, member: 667"] Hi, genedn, my Comet achieved 125kph max with 48teeth-sprocket. This was a value of a NSU-Max in the 1950ies, and not equivalent for a 500, as I remembered. So, set valves and ignition correctly (MKII-cams) and added 50teeth-sprocket which cured my problem: 142kph max.! Admittedly, lying flat on the bike in tight leathers, and only once for test purpose. Thank god, that nobody could see, who it was! I used a bycycle-digital speedo which stores max. values. I noted max. speeds in every gear, to observe, that it reached max. rpm in 1st to 3rd, but not in fourth. In Paul Richardson´s book you can find the gear ratios to find out, that with stock sprockets, the engine will settle at 4800rpm only for 125kph, as it is around 20- 22hp with the comet engine. For 90mph you must at least have 28hp, ie. full rpm, with a bike as large and heavy, as a Comet! I wanted to see 90mph, as my friend´s Falcone does 125kph with a sidecar fitted! Now I am happy at 60 - 70mph for hours, if needed, and it´s real fun on twisty roads! keep smiling! Michael [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Comet Top End Speed
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