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Tech. Advice: Series 'A' 500cc/1000cc Bikes
B.T.H Mag-Dyno
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<blockquote data-quote="Robert Watson" data-source="post: 139625" data-attributes="member: 38"><p>As I read this a small flicker of light appears. </p><p></p><p>On My A twin I changed the ratio of the primary drive quite a bit. I made a new 53T clutch sprocket (which you can do on a Honda clutch but I don't think on a Burman) so I now spin the motor about 5 or 6% faster. If I recall I put at 22 and 46 on the final drive giving almost the same ratio as a post war twin. </p><p></p><p>I can't recall what I put in the kickstart gears but I did purchase a complete late Sq 4 box so likely whatever they had as standard. A certain machinist in town also made a couple of different ratchet gears to increase the kick over speed but I didn't need to change it as it does start reasonably easily.</p></blockquote><p></p>
[QUOTE="Robert Watson, post: 139625, member: 38"] As I read this a small flicker of light appears. On My A twin I changed the ratio of the primary drive quite a bit. I made a new 53T clutch sprocket (which you can do on a Honda clutch but I don't think on a Burman) so I now spin the motor about 5 or 6% faster. If I recall I put at 22 and 46 on the final drive giving almost the same ratio as a post war twin. I can't recall what I put in the kickstart gears but I did purchase a complete late Sq 4 box so likely whatever they had as standard. A certain machinist in town also made a couple of different ratchet gears to increase the kick over speed but I didn't need to change it as it does start reasonably easily. [/QUOTE]
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Tech. Advice: Series 'A' 500cc/1000cc Bikes
B.T.H Mag-Dyno
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