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Chain Tension

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I am coming off of a CRF450X and on to a 300RR.how do you check the chain tension?sitting on the ground the chain looks really loose but when i compress the rear suspension the tension looks ok.

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3 finger rule is what I use in the middle of the swingarm. You do NOT want to keep a tight chain. You can break stuff if it's too tight. I sometimes lean over the bike and grab the swingarm depressing the rear shock by pulling the arm and using my chest or stomach to depress the seat. Once you get 1/2 way of travel, reach down and make sure you got a little play. The manual says you can check it on a crate or on the ground. I am pretty sure!

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Says 35mm but that seems tight, I do the 3 fingers rule.

Another way to compress the suspension is use a tie down, then you can adjust it without going back and forth

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