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Old Yesterday, 08:43 AM   #1
HanShotFirst OP
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Need to learn about shocks

Hey ya'll,

I have my daughters '99 XT225, and I have a Kawi KLX650; both need rear shock rebuilds. Not only have I never done it, I really don't know squat about shocks. The shock on my KLX has a gas reservoir that's hose clamped to the frame, with a hose that goes to the shock(gas reservoir has a Showa sticker on it). I don't know much about the shock on the XT.

Anyone have a link to a reference/learning material on shocks? I'm assuming it's just, take apart, replace the seals, fill with oil. On the gas shock, they are supposed to have nitrogen, but I see people putting air in them all the time; what's up with that?

Any help would be appreciated.
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Old Yesterday, 10:31 AM   #2
matey peeps
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Most Japanese OE rear shocks are not rebuildable, but if they have flats for a wrench then may be. It's not a terribly complex process, but you do need some special tools. It's just a matter of disassembly, draining the oil, setting the floating piston depth if they have one, and adding oil and then nitrogen. Nitrogen under 200-300 psi pressure is used because it is thermally stable, won't aerate the oil, and adds some preload to the damper.

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Old Yesterday, 10:34 AM   #3
Hybridchemistry
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Well, gee, I'd trade you a stock KLX650 rear shock with about 20k miles on it for that silly old thing you have there...
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Old Yesterday, 11:42 AM   #4
HanShotFirst OP
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Quote:
Originally Posted by Hybridchemistry View Post
Well, gee, I'd trade you a stock KLX650 rear shock with about 20k miles on it for that silly old thing you have there...
I'm pretty sure the shock I have on my KLX isn't stock. I need to get in there to figure out what it is, but I have my ZZR up on the bench right now, and I have a bad knee and don't want to crawl around on the ground (basically, I'm not willing to endure pain to find out what shock it is). It's a Showa with a gas reservoir, that's all I know right now. The gas reservior is hose clamped to the frame, so I'm sure that's not factory. It's dead though, no dampening at all when I ride. And I'm pretty sure it's going to need a larger spring. I have the pre-load set all the way up, and I still compress the spring a good 40-50% when I sit on the bike (I weigh 235). So some real work will be needed on this shock, or I'm going to need a whole new one.
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Old Yesterday, 12:21 PM   #5
matey peeps
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Quote:
Originally Posted by HanShotFirst View Post
I'm pretty sure the shock I have on my KLX isn't stock. I need to get in there to figure out what it is, but I have my ZZR up on the bench right now, and I have a bad knee and don't want to crawl around on the ground (basically, I'm not willing to endure pain to find out what shock it is). It's a Showa with a gas reservoir, that's all I know right now. The gas reservior is hose clamped to the frame, so I'm sure that's not factory. It's dead though, no dampening at all when I ride. And I'm pretty sure it's going to need a larger spring. I have the pre-load set all the way up, and I still compress the spring a good 40-50% when I sit on the bike (I weigh 235). So some real work will be needed on this shock, or I'm going to need a whole new one.
Pics?
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Old Yesterday, 12:53 PM   #6
32x20
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I'd figure out what shocks you have first and google it to death to see if you can find a rebuild how-to.

I just rebuilt a DRZ rear shock using this walk-through: http://idriders.com/proflex/files/shock%20service.pdf
If you have a Showa or KYB it sounds like that procedure will get you there.

I had the shock recharged with nitrogen after checking function with air. It was a PITA and I prob paid too much to have it charged but you may have more options depending on your location. I considered going with air but I work the suspension pretty hard and didn't want to have to worry about screwing something up.
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