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Dirt Bike Mods & Maintenance
Thinking out loud about forks
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[QUOTE="John Curea, post: 69628, member: 17497"] The one nagging question that gets stuck in my mind relates to the different midvalve builds in the 28mm and 32mm cartridges. I am trying to compare midvalve build designs on my 99KX250 with 28mm cartridge and 12mm piston rods vs. a late model YZ with 32mm cartridges with 12mm piston rods I dont want to throw the late model WP into the equation just yet because it has 28mm cartridge with 14mm piston rod. I want to keep it "apples to apples" so to speak. Anyways, I am trying to determine the performance difference between the KX and YZ midvalves. I realize the only fluid displaced through the base valve eqauls the area of the piston rod in the cartridge at any given time. Reguardless if the piston rod lives in a 32mm or 28mm cartridge, the piston rod will still only displace X amount of fluid through the base valve. The YZ midvalve is built extremely light, including float dimensions compared to the KX midvalve. Other than factoring in the physical size difference (the YZ being 3mm larger) of the midvalve pistons, is there any other factor that influences the design/performance of the midvalve? (I have a feeling there is, I just cant get it nailed down). Take Care, John ------------------ 99 KX250 98 KTM50 88 LT250R 86 TRX70 [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Thinking out loud about forks
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