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The TTR250 FAQ web pages -> TTR250 -> Repairs and maintenance -> Rear suspension questions ('05 US blue tank)
Post Info TOPIC: Rear suspension questions ('05 US blue tank)
OR3X


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Rear suspension questions ('05 US blue tank)
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Hello All!

 

I have the rear shock out of my bike for a new upper bearing, and decided this would be a good time to check to make sure the strut is still in good working order. I took the shock to a local shop to have the spring removed since the spring compressor tool I had was simply too big. They removed the spring for me (by loosening the locking rings at the top!! I didn't think this was a good idea since it might introduce twist in the spring when re-tightening, but the guy at the shop said it was fine) and I took it back home and noticed that if I compress the strut by hand it doesn't rebound. it simply stays compressed. I read that this could be due to it being adjusted wrong, so I ran through the adjuster on both the reservoir and the bottom of the strut and nothing changed. I then had to clamp the bottom end in my vise and pull as hard as I could to get the strut to extend again. Maybe I'm wrong, but I didn't think this is how the strut was supposed to function. I have also noticed that the reservoir seems to be completely empty when I shake it. I assumed that it was meant to have oil in it, and I would be able to feel it in there if I shook the reservoir around. One more thing, my bump stop is completely shot, and half of it is missing. Is it possible to replace just the bump stop without rebuilding the entire strut? Is my strut just shot anyway? As you can tell I'm a complete novice when it comes to suspension stuff, so any help would be great. I've read through a few posts here about the shock, and also the info over at TTR250.com but I'm still unsure how I should proceed. Thanks for any input!

TTR250_Rear_Shock.jpg



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TTRfan


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Hi Nicholas and welcome to the forum biggrin

If you look through this guide you will see how the shock absorber can be dismantled, repaired and re-assembled. 

Is the chrome on the shaft in good order? If there is any flaking, rust or damage in the section that moves through the seal head then it will likely have blown the seal and lost the fluid.

If it is in good order, have you a bike shop nearby that repairs shocks and can pressurise yours to see if it holds pressure etc?

You will see from the guide that you have to take off the bottom yoke to replace the bump stop.

I hope that helps?

Brian



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OR3X


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Hi Brian!

I've looked through the guide you posted and it looks a bit too complex for my abilities. The shaft appears to be in perfect condition. I live in the middle of nowhere southeast US and there are unfortunately no shops that do suspension work in my area. (finding one that would agree the even attempt to remove the spring was tough) A quick google search shows that the nearest shop that advertises suspension work is about a 4 hour drive. Looks like I might be stuck between a rock and a hard place, as they say. I've included a short clip showing what I was describing in my post.



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ttr steve


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Can you find someone to re pressurise it for you? the clicker will then work, nitrogen needles should be available in your country, you could then do it yourself?



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OR3X


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I'm looking. Not having much luck finding anyone local that could do it.



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OR3X


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**UPDATE** I've found a small Yamaha dealer about 2 hours away that says they can rebuild the whole shock for US$120. I'm going to bring it to them tomorrow!

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ttr steve


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Cheap cheap cheap, well done smile



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OR3X


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Well, the shop called today and told me that they can't source a rebuild kit for this shock (figures) but they could replace the oil and re-gas it and see if it holds. In the meantime they told me that if I could source a rebuild kit, they'd be happy to do the entire rebuild. Anyone have a source for such a kit, or perhaps a kit for another rear shock that would fit it? I've heard that the WR250 rear shock is very similar to the TTR250 internally, but I have no way to verify this.

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TTRfan


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Hi Nicholas.

There are links to a UK supplier of the seal head, etc, for the TTR250 shock on the guide but I guess you are looking for a domestic supplier?

Brian



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OR3X


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Hi Brian,

 

What all is necessary for a "rebuild"? Is it just the seal head, or are there other necessary components? Domestic would be preferable since I'm supposed to be racing this bike on the 30th of this month.

 

Thanks for any help!



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OR3X


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Well, after a lot of time and a ton of frustration I figured I would update this thread. I found a small shop near Atlanta GA called GMD Computrack who were able to rebuild the shock for $311. Interestingly the invoice I received included the RaceTech part numbers used.

SEAL HEAD
p/n: SSSH4614-SK
measurements: 46X14X20

BUMP STOP
p/n: SSBO144439-B/O
measuremnts: 14X44X39

Hope this helps anyone else in the Southeast US looking to get their rear shock rebuilt.

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