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I have a T100 Bonneville and the service manual really sucks. The dimensions for the chain tension are taken with the bike on its side stand and they want me to depend on the little notches on the adjustment part for wheel alignment. The absurdity gets worse when the manual tells me to rotate the wheel until the chain is at its tightest point.
Now if your chain gets tighter at some point in the rotation of the wheel you have a serious drive train problem.
I have adjusted chains and aligned wheels for a whole lot of years and those little notches don't do it for me. I have two pieces of light guage angle iron for straight edges.
My problem is the dimension for the tension. Due to the geometry of the suspension the chain gets tighter under a heavier load and the tightest point possible would be when the suspension "bottoms out." Loosest point would be with the bike on a center stand. The old manuals for Meriden Triumphs knew this and the dimension was 1 3/4" with no load.
I think I'll try to compress the rear suspension and then tension the chain.
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Gale Gorman
Houston
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