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i need suspension tuning help

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i recently got a 1999 yz400f, and the front forks bang when i go over a bump or rock. they dont bottom out, but when they rebound, they bang. the person we got it from is about 200, or 210. im 175, so i know they need to be adjusted. any advice on what the compression and rebound should be set would be appreciated.

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i recently got a 1999 yz400f, and the front forks bang when i go over a bump or rock. they dont bottom out, but when they rebound, they bang. the person we got it from is about 200, or 210. im 175, so i know they need to be adjusted. any advice on what the compression and rebound should be set at would be appreciated.

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your forks need a rebuild (at least). sounds like there is little to no oil in them or the midvalve shims are bent out of shape.

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