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Fork kicks from side to side at fast speed

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hi.

Im riding a 98 YZ125. the fork just got refreshed 3 months ago. (bushings, seals, oil) im about 140lbs with all the gear. got the Compression set almost wide open and the rebound about 6-7 clicks from wide open. SAG set correctly.

The suspension feels really great and plush most of the time but when i speed up, usually in higher gears and over 40 MPH, as i open the throttle on roads with small-medium rocks the front end gets very cranky and the forks are like kicking from side to side very hard, no matter how hard i hold on the bars. gets me really tired and i already had a big High Speed crash becuase of this.

what can i do against this? could the problem maybe lye in the rear shock setting?

thanks

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Does it get worse or better if you add fork compression damping? Are the forks set to the proper height in the clamps?

If all else fails, get a Scotts damper, but I don't really like the idea of masking problems with one of those.

(Do get one eventually, the bike will ride much more docile)

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MX bikes sometimes do get unstable at decent speeds, they are designed to steer tight at low speeds generally, you may need a steering damper, do you have the forks flush with the clamps? this will help.

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