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Discussion Starter #1
Anyone know if the distance between the swing arm pivot point and the rear axle stay constant with the swing arm up and down movement? Just curious as to how that relates to chain adjustment.
 

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It is a constant distance from the swing arm pivot to rear axle. The front sprocket is a bit offset(in front of) compared to the swing arm pivot, so this affects the chain slack as the swing arm moves up/down. Usually the chain gets tighter as the swing arm moves up(compressing the rear shock) and has the most slack when the swing arm moves down (extends the rear shock).
 

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Discussion Starter #3
Good to know. I usually adjust the chain on the loose side and reach down and check when I'm sitting on the bike to assure it's not too tight.
 

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Pulsar2 is right on the money with his response.
BMW had a bike (G450X) for a while where the sprocket was right at the swingarm pivot so the chain tension remained constant throughout the entire up/down stroke. Interesting. But it must make other things difficult (like fitting an 'endless' chain!) or everyone would do it.
 
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