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Honda MX & Off-Road Dirt Bikes
XR400 preload spacers
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[QUOTE="crazybrit, post: 1079428, member: 67247"] In thread [url]http://dirtrider.net/forums3/showthread.php?t=121664[/url] John Harris says: "The better? way is to put the springs in the forks and screw the cap onto the center rod, then measure the uncompressed distance between the top of the springs and the cap for the spacer. Add to this dimension the amount of preload you want on your XR springs, usually 3 to 10 mm and then cut your spacer. Be sure you have the rings/caps on both ends of the springs (from the stock springs) before you do your measuring and then of course use them in the installation. To help you out--if I remember correctly with 10mm of preload my spacers were about 1.5" long." 'between the top of the springs and the cap for the spacer' ... I'm assuming John means between the top of the spring and the bottom of the fork cap. [URL=http://www.tonyjones.com/bikes/kdx/fork.jpg]Click here for a picture[/URL] of my fork (hanging uncompressed) with the XR400 spring installed, fork cap screwed onto the rod and the two spacer washers (for the spacer) installed above the spring (top one upside down so flange is inside fork cap - for purposes of getting a correct measurement). I have maybe 0.5 mm of gap so I'm confused as to how John got to a 1.5" spacer length. He seems to know what he's talking about so that leaves only one thing, spring length. My stock springs are 18.5" long and the XR400 ones (supposedly from a 1998) are 21" long (2.5" longer). In the old thread I referenced above the difference in length was 1.5". Clearly I'm making a smaller spacer :-) Just wanted to confirm I'm doing the measurements correctly and I'm somewhat curious on the longer length of the springs I got. Tony [/QUOTE]
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Dirt Bike Discussions By Brand
Honda MX & Off-Road Dirt Bikes
XR400 preload spacers
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