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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Spring Rate Preload and valving!
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[QUOTE="Wile_E_Coyote, post: 922485, member: 61113"] [b]Too many variables[/b] Hi, I’m new to the forum but not new to the sport. I usually keep my opinions to myself, but I’ll share it in this thread. IMHO, there is no answer that can be correct every time. That’s why a professional suspension tuner is needed to eliminate the guesswork. When you consider the variables: oil viscosity, oil composition, oil volume, spring rates, (springs that are not rated properly), preload, cartridge design, piston and base valve design, bushing tolerance, mid valve differences, top out springs, proper weight balance of the bike, not to mention seal composition and stiction. I can go on and on, but the bottom line is that with all these variables, it takes an experienced tuner to get it right consistently. There is no magic setup. Experience and testing is the answer. I personally think that position sensitive dampening is a good thing. That is if it is set up right. Most people confuse this with speed sensitive dampening which is what most forks are. For a position sensitive setup to work the ride height must be correct. I've only seen this done effectively when the compression is in one fork and rebound in the other. Many people think that the conventional zokes in the 90's were the best feeling forks ever made. My memory is fading but I think they had some type of position sensitive system. Personally I like the 1989 KX 46mm conventional cartridge forks for overall feel, (my age is showing), anyone else like them? Recently I am becoming a huge fan of the new twin chamber forks; they are destined to be my all time favorites. The concept of an inertia valve for off-road/mx may be a waste of time. Think about the forces that go on during the suspension action. You may need a microprocessor controlled valving system to determine the exact inertia points and vary them while monitoring the position and rate. Is the future of suspension electronic? Please let’s not go there. Now that would keep me up at night. Spring for the weight of the rider, preload varies with weight of the bike and application. Valve for the most progressive feel and the best control, make small adjustments where needed and keep a log of everything you do so you can back track need be. Keep the fork oil clean and fresh, train harder and stop blaming the bike when it's your physical conditioning that is causing the problem. Thanks Jer for keeping everyone thinking. [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Spring Rate Preload and valving!
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