Rear eccentric help!!!!

Discussion in 'Mechanics Garage' started by douglasthecook, Mar 16, 2007.

  1. douglasthecook

    douglasthecook New Member

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    Ok, I need you help. I'm in the process of re-assembling my rear axle, and installing my new chain and sprocket as well. I had to dis-assemble the rear axle assembly to change out my rear rotor. So as I'm putting everything together it dawns on me that I moved the eccentric chain adjuster. So what position do I place it in? The one that has the rear axle the closest to the engine to give me the shortest chain? Or do I rotate it down a little further until the rear brake caliper link is in the most foward position? Neither my Clymer, or Honda Factory manuals say anything about the initial position of the eccentric when doing the re-install. I looked around this website, and didn't find what I needed. What do you guys and gals think???
     


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  2. mello dude

    mello dude Administrator

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    Some ideas- Still got the old chain? Count the links on it and use same number for the new. Your chain adjustment will then be where it will be.

    If not - here's a gearhead idea. Look at the manual/specs for wheel base length. Set eccentric adjuster to close as you can get it to that number - it will be fifty some inches and change, axle to axle. Then wrap your chain around the front sprocket and feed it back and load it on the rear sprocket so the links meet at about the 3 o'clock position. Cut to length there. Oh yeah before you cut the chain, check to see that the eccentric adjustor has some good movement to adjust the chain when its time. If not move it forward a link, maybe two. Just guessing the factory wheelbase number will be fine.

    - If I had thrown out my chain, I would do it like this.

    MD
     


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  3. douglasthecook

    douglasthecook New Member

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    Well, I might have a problem with this, as I have a larger 45 tooth rear sprocket. However center to center of axles should be the same if I'm not mistaken, so I'll give it a go, after all I have nothing to lose!!! Thanks for the tip!!!
     


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  4. mello dude

    mello dude Administrator

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    Well, Youll have to do it the gearhead way then. :eek:

    Good luck!

    MD
     


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  5. douglasthecook

    douglasthecook New Member

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    Ok, I think I have it figured out. If you take a look at my gallery the first three photos will show the eccentric. Position #1 is with the eccentric all the way foward in it's travel. Position #2 should give me the shortest chain length. Position #3 will give me the longest chain length. So I would think that I would want to start at position #2, and as the chain wears progress to position #3. Let me know if my thinking is correct. Like I said before, the maintenence manual doesn't really say where to position the eccentric.
     


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  6. Vlad Impaler

    Vlad Impaler New Member

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    Sounds like a winner. Chain isn't going to get shorter and if you have the correct slack when you first install you should be in good shape. If you think you'd end up a little tight you might want to adjust back slightly to compensate. Let the chain be the guide.
     


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  7. mello dude

    mello dude Administrator

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    Check the wheel base with the eccentric all the way forward - I think it will be less than the manual. On my 4th gen I think I had the new chain cut too short a couple links or more and I felt it in the rear of the bike driving out of the corners. I think the adjustment is designed to handle more than a normal chain would stretch over its life. So start in the middle, take a quick wheel base check and go from there.

    MD
     


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