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  1. #1
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    how tight should chain be

    My chain was pretty loose so I tighten it but not sure if I over tightened.it's two finger tight,but when i sit on it, it's tight no play,is that good?







  2. #2
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    look in your service manual, but the chain should have just a little slack on 2 strokes.



    m y   s i g n a t u r e:


    Waiting to get a 125 2 stroke.

  3. #3
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    no manual




  4. #4
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    i go by 3 fingers from the top of the swing arm




  5. #5
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    Quote Originally Posted by skipa
    not sure if I over tightened.it's two finger tight,but when i sit on it, it's tight no play,is that good?
    NOOOOOOOOOOO! That's not good.

    There is no general rule like the two finger rule that applies to all bikes. The best way to adjust your chain, IMO, is to have someone sit on the back of your seat and compress the suspension ALL THE WAY DOWN. You will notice as the suspension moves through its travel, the chain will get tighter and then looser. When the chain is at its tightest point, adjust it to a minimum of 3/4".

    It is different on different bikes. It all depends on the relation of the swingarm pivot point to the location of the counter shaft sprocket. Some bikes the chain is tightest at the beginning of the stroke and some at the end. Many are tightest in the middle of the stroke. You will have to compress the suspension to see the best point to adjust your chain.

    If your chain is too tight it can cause damage. It can damage the countershaft bearing and in some cases break the countershaft bearing out of the engine case. It can also break the chain and stuff it through your cases.

    It's better to error on the side of being too loose than too tight.

    Also, invest in a manual. It will save you much grief and money over the long run.

    Just my $ .02




  6. #6
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    +1 ^, you can usually just lean over the seat, weight it with your chest and pull on the swingarm with one hand and check the chain with the other. Like 89r says, it tightest when the sprocket centers and swingarm pivots all line up. Unless your susp is real stiff or your real light you can compress it that far as I describe. Run it a little looser than normal if your in mud or sticks.




  7. #7
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    This will be when the chain is the tightest on all bikes.
    Photobucket



    You can use a straight edge to measure the sag precisely.
    (downward pressure on chain at measuring point)
    Photobucket



    You want 1-3%, of the shaft-to-to-shaft measurement, in total up and down play of the chain, when it is at it's tightest point.
    Photobucket

    Take care to keep the sprockets aligned when tensioning. Always double, triple, check things as you tighten back.





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    The Universe is my way, Love is my law. Peace is my shelter, Experience is my school.
    Obstacle is my lesson, Difficulty is my stimulant. Pain is my warning, Work is my blessing. Balance is my attitude, Perfection is my Destiny. -Guillermo Tolentino

  8. #8
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    Jaybird's advice is real good. Notice how the tension is checked when the countershaft/swingarm pivot/rear axle are in a straight line. You can do this first most important part with a tiedown or two to compress the rearend. Once you've established correct tension, put the bike on a stand and find a reference point for measuring (for an easier future way of adjusting.)



    m y   s i g n a t u r e:


    "A man can no more diminish God's glory by refusing to worship Him than a lunatic can put out the sun by scribbling the word, 'darkness' on the walls of his cell."
    C S Lewis, The Problem of Pain

  9. #9
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    Thanks you dudes rock




  10. #10
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    Thanks Jaybird. That's the best illustration I've ever seen. Just to add, you can also put the bike on a stand and remove a bolt from the lower suspension link. Then you can move the swingarm up and down with ease, by hand.




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