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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Bad KYB Shock Service?
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[QUOTE="shockdoc, post: 78920, member: 23028"] Hey Guys I have had several KYB shocks do this. Mostly Kaw but a couple others also including a brand new 01YZ250. I have seen this in the last 12 months or so and this is what I have found so far. I have replaced everything (even diff. oils) inside several shocks and found that the bodys have been the main problem. I was told by a couple other suspension builders that there has been some bad KYB bodies in the last couple years but not bad enough for any kind of recall. I had a reputable machinest look at a couple of bodys and he determined that they were made egg shaped and that what was happening was that the body would swell and actually get smaller on the inside. He actually built a jig and pressed the body (from the outside) while keeping a dial guage on the inside and pressed the body back round. That shock is still working after trying a new OEM piston, and shaft assy first which didn't work. The rest of the shocks I've just replaced the body and they have worked fine. The only thing I can't figure out is why sometimes its a brand new shock that hasn't been apart and sometimes its a 6 month old shock that has been working fine then all of a sudden 1 day it locks up as soon as it gets hot. doc [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Bad KYB Shock Service?
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