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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Prototype of new AVO coilover for Series ‘D’ Vincents
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<blockquote data-quote="hadronuk" data-source="post: 100955" data-attributes="member: 1866"><p><strong>Production version of D Series rear coilover:</strong></p><p></p><p><strong>[ATTACH=full]24622[/ATTACH]</strong></p><p></p><p>Testing of two prototypes of the AVO coilover for D series bikes has been completed very satisfactorily and AVO are now taking orders for the first batch produced.</p><p>Delivery could be around or just after Christmas.</p><p>The price is the same as the B/C series coilovers, £200 +p&p +VAT.</p><p>The units are a straightforward swap for the standard unit.</p><p>There are two versions, a standard version and a low seat height version.</p><p></p><p><strong>PC1589 is the standard version</strong>.</p><p>Ride height and load carrying capacity are very close to the original, but a solo rider could set a minimal spring preload in order get a slightly lower seat height when astride the bike.</p><p>It is fitted with a 350 lb/inch spring, part number <strong>A10350</strong>.</p><p>Other spring rates are available to special order.</p><p></p><p><strong>PC1590 is the low seat version. </strong></p><p>The lower seat height is achieved by a ¾” reduction in the extended length of the damper that lowers the seat by about 1.125”. The closed length remains as standard.</p><p>You might reasonably think “Less travel? Must be less comfortable!”</p><p>To which I reply “Not if you set it up right!” </p><p>In stark contrast to B/C bikes, the D series design has greatly increased suspension travel. In fact it is quite good even by modern standards. Consequently, an average weight solo rider seldom uses much more than the top part of the suspension movement.</p><p>The low seat height version with the same rate spring is equally comfortable, but a larger part of the available suspension travel is used. When the low seat height version is two-up, bottoming out can be minimized by increasing the spring preload and possibly increasing the damping. This keeps the suspension travel in the centre of its range. Depending on many variables, some riders may find a single preload setting is OK for both solo and two up. Others may find it preferable to always change the settings according to load.</p><p></p><p>The low seat version is offered with a choice of springs to best match the intended use:</p><p></p><p><strong>300lb/inch Part No A9300.</strong> Suitable for an average weight rider who usually rides solo and wants the most comfortable ride.</p><p><strong>350lb/inch Part No A9350. </strong>Suitable for two up and solo riding. May bottom out a bit when two up.</p><p><strong>400lb/inch Part No A9400.</strong> For predominately two-up use.</p><p></p><p>Both testers very helpfully opted for the reduced seat height option, so this option has been tested both solo and two up. </p><p></p><p><strong>A note about centre stands. </strong>A bike fitted with the shorter coilover PC1590 will inevitably be a bit harder to lift onto the stand. Both testers report this is not a big issue, in fact one hadn’t really noticed until I asked about it!</p></blockquote><p></p>
[QUOTE="hadronuk, post: 100955, member: 1866"] [B]Production version of D Series rear coilover:[/B] [B][ATTACH=full]24622[/ATTACH][/B] Testing of two prototypes of the AVO coilover for D series bikes has been completed very satisfactorily and AVO are now taking orders for the first batch produced. Delivery could be around or just after Christmas. The price is the same as the B/C series coilovers, £200 +p&p +VAT. The units are a straightforward swap for the standard unit. There are two versions, a standard version and a low seat height version. [B]PC1589 is the standard version[/B]. Ride height and load carrying capacity are very close to the original, but a solo rider could set a minimal spring preload in order get a slightly lower seat height when astride the bike. It is fitted with a 350 lb/inch spring, part number [B]A10350[/B]. Other spring rates are available to special order. [B]PC1590 is the low seat version. [/B] The lower seat height is achieved by a ¾” reduction in the extended length of the damper that lowers the seat by about 1.125”. The closed length remains as standard. You might reasonably think “Less travel? Must be less comfortable!” To which I reply “Not if you set it up right!” In stark contrast to B/C bikes, the D series design has greatly increased suspension travel. In fact it is quite good even by modern standards. Consequently, an average weight solo rider seldom uses much more than the top part of the suspension movement. The low seat height version with the same rate spring is equally comfortable, but a larger part of the available suspension travel is used. When the low seat height version is two-up, bottoming out can be minimized by increasing the spring preload and possibly increasing the damping. This keeps the suspension travel in the centre of its range. Depending on many variables, some riders may find a single preload setting is OK for both solo and two up. Others may find it preferable to always change the settings according to load. The low seat version is offered with a choice of springs to best match the intended use: [B]300lb/inch Part No A9300.[/B] Suitable for an average weight rider who usually rides solo and wants the most comfortable ride. [B]350lb/inch Part No A9350. [/B]Suitable for two up and solo riding. May bottom out a bit when two up. [B]400lb/inch Part No A9400.[/B] For predominately two-up use. Both testers very helpfully opted for the reduced seat height option, so this option has been tested both solo and two up. [B]A note about centre stands. [/B]A bike fitted with the shorter coilover PC1590 will inevitably be a bit harder to lift onto the stand. Both testers report this is not a big issue, in fact one hadn’t really noticed until I asked about it! [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Prototype of new AVO coilover for Series ‘D’ Vincents
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