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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Need help with harsh forks
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[QUOTE="dirt bike dave, post: 926140, member: 18302"] You need to reduce the high-speed compression damping on that fork if you want it to work well on rocks and roots. Basically, on a really sharp hit, the excessive high speed damping will not allow the fork to move quickly enough. Lowering the oil height will allow the forks to bottom out more easily, but will not really change how quickly the fork responds to a sharp hit in the first part of the travel. Lighter oil mainly effects the rebound damping, and will not make a big change to how the fork responds to a sharp hit from a rock or root. The KDX needs the stiffer springs if you want it to handle big jumps and whoops, but even with the soft stock springs there is too much high speed compression damping on the sharp hits. The Race Tech cartrdidge fork emulators are for the earlier generation KDX's with damper rod forks. Too soft springs and too much high speed damping is a characteristic of all years of KDX. I had the emulators on my '90, and they and worked wonders. I belieive your bike should have the more modern fork and would use the gold valve instead of the emulators. I used the gold valves on a '91 KDX250 and they worked well, but based on a friend's experience, I used a shim stack that had less high speed damping and slightly more slow speed damping than Race Tech's chart recommended (with the gold valve they give you a bunch of shims and a chart to help you figure out which way you want to stack the shims). If you have a reputable suspension shop in your area, they may be able to revalve your forks even without a gold valve. [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Need help with harsh forks
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