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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: 99526" data-attributes="member: 456"><p>So you have the JE mod and Davidd's short springs; that is not a combination I would have thought would be good. If you recall people found that Davidd's springs intended for Comets were much too soft on road equipped bikes and over here we ended up using one sidecar strength spring and one twin solo strength spring to get a reasonable amount of movement on twins and even some singles. These springs were 14" length, if I remember correctly, and the 36 lbs/inch and weaker springs that I supply are intended to be fitted with a length of 13.5" and 3" of pre-load. There is now a known problem of different spring boxes having different length ends but I will ignore that for now. This means that you only have about half an inch of pre-load. What is the angle of your lower link when the bike is on it wheels or when you are sitting on it? It should be horizontal or even very slightly down at the front. It is good that you are getting over 3" of movement so perhaps your combination works as well. Certainly the experience of Greg and his chums is that stronger springs and weaker damping works for them while over here stiffer damping and weaker springs seems to be the preferred option. Maybe you have found yet another combination. HELP!!<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite12" alt="o_O" title="Er... what? o_O" loading="lazy" data-shortname="o_O" /> </p><p>However, feedback is what is useful so thank you.</p></blockquote><p></p>
[QUOTE="timetraveller, post: 99526, member: 456"] So you have the JE mod and Davidd's short springs; that is not a combination I would have thought would be good. If you recall people found that Davidd's springs intended for Comets were much too soft on road equipped bikes and over here we ended up using one sidecar strength spring and one twin solo strength spring to get a reasonable amount of movement on twins and even some singles. These springs were 14" length, if I remember correctly, and the 36 lbs/inch and weaker springs that I supply are intended to be fitted with a length of 13.5" and 3" of pre-load. There is now a known problem of different spring boxes having different length ends but I will ignore that for now. This means that you only have about half an inch of pre-load. What is the angle of your lower link when the bike is on it wheels or when you are sitting on it? It should be horizontal or even very slightly down at the front. It is good that you are getting over 3" of movement so perhaps your combination works as well. Certainly the experience of Greg and his chums is that stronger springs and weaker damping works for them while over here stiffer damping and weaker springs seems to be the preferred option. Maybe you have found yet another combination. HELP!!o_O However, feedback is what is useful so thank you. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Modified Steering Stem
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