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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
New Coilover for Girdraulics
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<blockquote data-quote="greg brillus" data-source="post: 101724" data-attributes="member: 597"><p>As great the idea of making a coilover available for Vincent owners, I feel the number sold will be minimal. If you look at the number of JE mod stem kits produced the numbers are not high, and the number of users with this mod in service is pretty small from what I can see, especially over your way. The reason I found the spring rates could be higher even on a Comet, is that some of the shock absorbers are too stiff in their action, especially the new Avo's, these on a light bike like a Comet are way to stiff. If riders took the simple action of removing their front shocker and ride the bike a short distance, you will soon see that the softer springs at 33 or 36 Lb's are too soft and will readily bottom out.............This is not the job of the shocker to control that. A Comet with two of the 45 Lb springs cut down about 20 mm and a soft action shocker like an original Armstrong or similar gives a fabulous and comfortable ride, far superior to Brampton's. I have had the ability to experiment around with many variations of parts to make this work. I think the spring I used on the front of the racer was 170 Lb's but that bike is quite light, more so than a standard twin. The clash between the spring and the upper link is the only real issue..........The coilover I used had open centers at 270 mm apart, and this was used with the very first JE mod stem kit that I installed. That with the fully sprung rear seat is probably the best handling and ride comfort Vincent I have ever ridden, well for a twin anyway.</p></blockquote><p></p>
[QUOTE="greg brillus, post: 101724, member: 597"] As great the idea of making a coilover available for Vincent owners, I feel the number sold will be minimal. If you look at the number of JE mod stem kits produced the numbers are not high, and the number of users with this mod in service is pretty small from what I can see, especially over your way. The reason I found the spring rates could be higher even on a Comet, is that some of the shock absorbers are too stiff in their action, especially the new Avo's, these on a light bike like a Comet are way to stiff. If riders took the simple action of removing their front shocker and ride the bike a short distance, you will soon see that the softer springs at 33 or 36 Lb's are too soft and will readily bottom out.............This is not the job of the shocker to control that. A Comet with two of the 45 Lb springs cut down about 20 mm and a soft action shocker like an original Armstrong or similar gives a fabulous and comfortable ride, far superior to Brampton's. I have had the ability to experiment around with many variations of parts to make this work. I think the spring I used on the front of the racer was 170 Lb's but that bike is quite light, more so than a standard twin. The clash between the spring and the upper link is the only real issue..........The coilover I used had open centers at 270 mm apart, and this was used with the very first JE mod stem kit that I installed. That with the fully sprung rear seat is probably the best handling and ride comfort Vincent I have ever ridden, well for a twin anyway. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
New Coilover for Girdraulics
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