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Dirt Bike Discussions By Brand
Canadian Daves JustKDX
Fork Spring Preload
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[QUOTE="canyncarvr, post: 144604, member: 16552"] Then you used the spacer that was already there? The steel tube? Set preload by: 1. Assemble fork with everything except the spacer you took out. Include the washers. 2. Measure the 'space'..between the two washers. Say it's 80mm. 3. Add to that measurement the amount of preload you wish. In this case, for a 10mm preload, you would cut a spacer to 90mm. You can use 1" PVC for spacers. Use schedule 40 PVC. You can use the existing steel tubes, too. It's harder to fashion to the required length. Yes, your boots will not allow full compression. Take them off. Spring is out to check oil level. Pump the piston rod a few times to make sure you have all the bubbles out of the system. When checking the level, let the rod sit at the bottom of its travel. Proper oil level is set by putting in MORE than you need, then extracting the excess out (use a big syringe with rubber tubing cut to the level you want). The purpose of preload is to make sure everything stays tight. Putting in a bunch of it just wastes available spring movement. OEM preload is way too much imo. 5mm will do. A local tuner uses only 2-3mm. Your springs will soften up on the little stuff alot if you set your preload to something reasonable. Doesn't the 'finger tight' part comes from pre-assy to measure for preload? Certainly on final assy, it's not finger tight. Check the torque specs in the front of your manual. If you don't find it, ask. [/QUOTE]
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Dirt Bike Discussions By Brand
Canadian Daves JustKDX
Fork Spring Preload
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