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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Modified Steering Stem
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<blockquote data-quote="timetraveller" data-source="post: 97931" data-attributes="member: 456"><p>That looks right to me Tim. For others; there has been considerable private correspondence between Vibrac and myself over the fact that his fork movement seems too stiff. He has gone from 33 lbs/inch springs to 30 lbs/inch springs and put a softer damper on there. He has checked that without springs and dampers the forks move easily. Other ideas have been explored and I am now out of ideas. No one else has found the same although at least two relatively light weight twin owners have found the 45 lbs/inch springs too stiff and have moved to 36 lbs/inch springs with total success. This is one of the reasons I need feedback. Only when enough people have used this modification can we decide which combination of parts will suite what weight of rider and bike. Chris Launders, who did all the test riding, weighs nearly 300 lbs and with the Greg conversion needed 45 lbs/inch springs and a stiffer damper. The Tlleys, two up and with touring gear, seem to be happy with 36 lbs/inch springs. The 45s have 2" of preload and the 36s, 33s and 30 have 3" of preload. Vibrac tells me that if he puts the brake on and pumps the handlebars up and down he gets movement but as he lives 120 miles north of me I cannot just pop round and check the system out. Any ideas welcome.</p></blockquote><p></p>
[QUOTE="timetraveller, post: 97931, member: 456"] That looks right to me Tim. For others; there has been considerable private correspondence between Vibrac and myself over the fact that his fork movement seems too stiff. He has gone from 33 lbs/inch springs to 30 lbs/inch springs and put a softer damper on there. He has checked that without springs and dampers the forks move easily. Other ideas have been explored and I am now out of ideas. No one else has found the same although at least two relatively light weight twin owners have found the 45 lbs/inch springs too stiff and have moved to 36 lbs/inch springs with total success. This is one of the reasons I need feedback. Only when enough people have used this modification can we decide which combination of parts will suite what weight of rider and bike. Chris Launders, who did all the test riding, weighs nearly 300 lbs and with the Greg conversion needed 45 lbs/inch springs and a stiffer damper. The Tlleys, two up and with touring gear, seem to be happy with 36 lbs/inch springs. The 45s have 2" of preload and the 36s, 33s and 30 have 3" of preload. Vibrac tells me that if he puts the brake on and pumps the handlebars up and down he gets movement but as he lives 120 miles north of me I cannot just pop round and check the system out. Any ideas welcome. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Modified Steering Stem
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