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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Modified Steering Stem
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<blockquote data-quote="Martyn Goodwin" data-source="post: 81459" data-attributes="member: 2433"><p>G'day Mac, Look again at the drawings I posted. The measurements for the holes (which are the important bits) is done on the outside of the angle iron so yes I use almost the full 50 mm for the horisontal part - but only about 20 mm for the vertical bit. Once you have the position of the holes sorted then you can shape the outside of the brackets however you wish.</p><p></p><p>Almost all of the damper travel is used when going from full lock to full lock BUT on my Comet its the bump stops on the headstem part of the UFM thats the limit of travel, not the damper movement. </p><p></p><p>If you need to change the amount of damper travel, that may be acheived by changing the position of the damper mounting hole in the bracket that goes under the headstem - move it closer to the centre line to reduce the travel and away from the centre line to increase the travel. But take care because you will impact where the mount hole on the engine bracket needs to go. You also need to be very careful that no part of the damper makes contact with the headstem at any point of its travel.</p><p></p><p> Its a case of trial and error - I made up 4 or 5 sets of brackets, all slightly different , before I was happy with the result.</p><p></p><p>Martyn</p></blockquote><p></p>
[QUOTE="Martyn Goodwin, post: 81459, member: 2433"] G'day Mac, Look again at the drawings I posted. The measurements for the holes (which are the important bits) is done on the outside of the angle iron so yes I use almost the full 50 mm for the horisontal part - but only about 20 mm for the vertical bit. Once you have the position of the holes sorted then you can shape the outside of the brackets however you wish. Almost all of the damper travel is used when going from full lock to full lock BUT on my Comet its the bump stops on the headstem part of the UFM thats the limit of travel, not the damper movement. If you need to change the amount of damper travel, that may be acheived by changing the position of the damper mounting hole in the bracket that goes under the headstem - move it closer to the centre line to reduce the travel and away from the centre line to increase the travel. But take care because you will impact where the mount hole on the engine bracket needs to go. You also need to be very careful that no part of the damper makes contact with the headstem at any point of its travel. Its a case of trial and error - I made up 4 or 5 sets of brackets, all slightly different , before I was happy with the result. Martyn [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Modified Steering Stem
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