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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Modified Steering Stem
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<blockquote data-quote="greg brillus" data-source="post: 78191" data-attributes="member: 597"><p>Yes it is unfortunate that this "Experimenting" becomes expensive and almost wasteful, and when I had a small batch of springs made, when I first used them I thought what a waste of time and money that was. Sometimes if you have nothing to lose, as I did and decided to just cut the springs down to get some sort of useful result. As we know when you cut a spring down it becomes stronger, therefore when I cut down the 40 lb springs I had by 3 inches from my calculations this rounds out to 50 lb's. Similarly when I shortened one of Norman's 36 lb springs by 1 inch I figured that would be nearer to 38 lb's at least. This gives an average rate for two same springs of 44 to 45 lb's. In Neal's Comet the shorter 40 Lb springs we cut down by 2 inches off each spring which probably gives a similar spring rate, but the installed springs have about 3/4 of an inch of pre-load which you can nearly install by hand (similar to David's springs) whereas my springs on my twin have about 2 inches of installed pre-load. Because I have a new Thornton shock absorber up front, it is easy for me to check the visual bumper rubber on the shaft of the unit to see exactly what is going on, and this has been quite a useful tool in getting prompt results. I don't feel that high spring rates are necessary, thus returning the front end to the original stiff set up. But somewhere in between seems to work fine. I had my bike out four times over the weekend, twice with my wife on the rear, and the front end worked well over some pretty rough bits of road, and I don't believe it bottomed from what I could see of the front bumper rubber. But I did not ride too aggressively either, which is not nice on a pillion rider.</p></blockquote><p></p>
[QUOTE="greg brillus, post: 78191, member: 597"] Yes it is unfortunate that this "Experimenting" becomes expensive and almost wasteful, and when I had a small batch of springs made, when I first used them I thought what a waste of time and money that was. Sometimes if you have nothing to lose, as I did and decided to just cut the springs down to get some sort of useful result. As we know when you cut a spring down it becomes stronger, therefore when I cut down the 40 lb springs I had by 3 inches from my calculations this rounds out to 50 lb's. Similarly when I shortened one of Norman's 36 lb springs by 1 inch I figured that would be nearer to 38 lb's at least. This gives an average rate for two same springs of 44 to 45 lb's. In Neal's Comet the shorter 40 Lb springs we cut down by 2 inches off each spring which probably gives a similar spring rate, but the installed springs have about 3/4 of an inch of pre-load which you can nearly install by hand (similar to David's springs) whereas my springs on my twin have about 2 inches of installed pre-load. Because I have a new Thornton shock absorber up front, it is easy for me to check the visual bumper rubber on the shaft of the unit to see exactly what is going on, and this has been quite a useful tool in getting prompt results. I don't feel that high spring rates are necessary, thus returning the front end to the original stiff set up. But somewhere in between seems to work fine. I had my bike out four times over the weekend, twice with my wife on the rear, and the front end worked well over some pretty rough bits of road, and I don't believe it bottomed from what I could see of the front bumper rubber. But I did not ride too aggressively either, which is not nice on a pillion rider. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Modified Steering Stem
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