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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: 81248" data-attributes="member: 456"><p>A further update today from Chris. He has sent me a ten minute video of the forks working with the new set up. The eagle eyed amongst you will notice that he has a rear AVO damper on the front. This has taken quite a lot of work to fit and it was used as when Chris tried the Thornton damper he felt that the extra travel might have had some advantage. We have been trying the new AVO dampers with different setting from those which were arrived at by Hadronuk. Those setting worked well when the Oilite bushes were used but both the damper settings and spring strengths turned out to be too weak when the Oilite bushes were replaced by either needle roller or ball races. We now have the damping (and spring strength) sorted out if a front damper is used on the front and this particular damper was set up with the same damping characteristics as the new setting for the front damper. Remember that this is all on the front of the bike. 45 lbs/inch springs are being used but Chris had to pack these to get the correct lower link angle as he weighs about 280 lbs, 127 kgs, so it seems that there might still be some advantage in various riders tuning the installed length of the springs to suit their usual loading. With this set up he is still only using about 2" of travel so more tuning by others might produce some improvements.</p><p></p><p>There is still a hold up on machining the holes at the rear of the lower links to take the ball races. Having had a long delay with the original machinist the new one told me on Thursday evening that he had a problem as well. He has set up a jig to allow the eyes to be line bored to ensure that they are both in line and parallel with the front bearings. It turns out that the eyes are so far out of line that if he used one side as a reference he would be 3 mm out on the other side. This is with trying to remove about four thou only to go from 1.25" to two thou under 32 mm. I have arranged to go down to the factory after the holiday and, once the machine is free again, have a look to see if there is something that can be done other than machining/honing each side independently. I will keep you all informed via this Forum. In the mean time I am going to try to attach Chris' video and if I fail then I will seek help from one of the experts on this Forum.</p><p><a href="https://drive.google.com/file/d/0B5hJaN36-PRKeHZ0Z2QyX01JSDQ/view?usp=drive_web" target="_blank"><strong><u> 003.MOV</u></strong></a></p></blockquote><p></p>
[QUOTE="timetraveller, post: 81248, member: 456"] A further update today from Chris. He has sent me a ten minute video of the forks working with the new set up. The eagle eyed amongst you will notice that he has a rear AVO damper on the front. This has taken quite a lot of work to fit and it was used as when Chris tried the Thornton damper he felt that the extra travel might have had some advantage. We have been trying the new AVO dampers with different setting from those which were arrived at by Hadronuk. Those setting worked well when the Oilite bushes were used but both the damper settings and spring strengths turned out to be too weak when the Oilite bushes were replaced by either needle roller or ball races. We now have the damping (and spring strength) sorted out if a front damper is used on the front and this particular damper was set up with the same damping characteristics as the new setting for the front damper. Remember that this is all on the front of the bike. 45 lbs/inch springs are being used but Chris had to pack these to get the correct lower link angle as he weighs about 280 lbs, 127 kgs, so it seems that there might still be some advantage in various riders tuning the installed length of the springs to suit their usual loading. With this set up he is still only using about 2" of travel so more tuning by others might produce some improvements. There is still a hold up on machining the holes at the rear of the lower links to take the ball races. Having had a long delay with the original machinist the new one told me on Thursday evening that he had a problem as well. He has set up a jig to allow the eyes to be line bored to ensure that they are both in line and parallel with the front bearings. It turns out that the eyes are so far out of line that if he used one side as a reference he would be 3 mm out on the other side. This is with trying to remove about four thou only to go from 1.25" to two thou under 32 mm. I have arranged to go down to the factory after the holiday and, once the machine is free again, have a look to see if there is something that can be done other than machining/honing each side independently. I will keep you all informed via this Forum. In the mean time I am going to try to attach Chris' video and if I fail then I will seek help from one of the experts on this Forum. [URL='https://drive.google.com/file/d/0B5hJaN36-PRKeHZ0Z2QyX01JSDQ/view?usp=drive_web'][B][U] 003.MOV[/U][/B][/URL] [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Modified Steering Stem
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