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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Help required measuring coil lengths on AVO coil over rear dampers.
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<blockquote data-quote="Chris Launders" data-source="post: 150102" data-attributes="member: 2010"><p>Nigel, the spring is the standard 275 lb spring, I recently got a 350lb one and it has A8350 etched or engraved on the end, from that (and my original spring which has A8275 on it) I am assuming the A is a diameter code, 8 is the length and the last three numbers the rate. I was running 1" of preload and bottomed out on a bump solo.</p><p></p><p>We have found that the 275 lb spring is right for a standard set up but as soon as you go to a fully sprung seat the loads on the spring increase massively, whereas on the standard set up they hardly vary.</p><p></p><p>We have found with the standard set up around 55% of the riders weight is carried on the spring, the remainder is on the rear seat stays and carried directly to the RFM, any pillion and/or luggage is almost entirely carried by the seat stays straight to the RFM, most of it pushing on the rear axle whereas with a fully sprung seat EVERYTHING is carried on the spring.</p><p></p><p>I think that AVO possibly didn't appreciate the difference between a standard a fully sprung seat set up.</p><p></p><p>Chris.</p></blockquote><p></p>
[QUOTE="Chris Launders, post: 150102, member: 2010"] Nigel, the spring is the standard 275 lb spring, I recently got a 350lb one and it has A8350 etched or engraved on the end, from that (and my original spring which has A8275 on it) I am assuming the A is a diameter code, 8 is the length and the last three numbers the rate. I was running 1" of preload and bottomed out on a bump solo. We have found that the 275 lb spring is right for a standard set up but as soon as you go to a fully sprung seat the loads on the spring increase massively, whereas on the standard set up they hardly vary. We have found with the standard set up around 55% of the riders weight is carried on the spring, the remainder is on the rear seat stays and carried directly to the RFM, any pillion and/or luggage is almost entirely carried by the seat stays straight to the RFM, most of it pushing on the rear axle whereas with a fully sprung seat EVERYTHING is carried on the spring. I think that AVO possibly didn't appreciate the difference between a standard a fully sprung seat set up. Chris. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Help required measuring coil lengths on AVO coil over rear dampers.
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