YZ250 - Rear shock question

L

Labradorcoaster

Good morning Guys,

I have a second hand 2007 YZ 250, like new with a small number of trail riding hours on it.

Noticed that the shock has a very quick rebound, dialed in the adjuster to max. and it didn't make any difference.
In my mind it seems like the shock is shot and it is only the spring giving me the bounce. But I find it hard to beleive that the shock would have failed with only a few hours on the bike.

Am I missing something, is the shock refillable/ rebuildable. Or should I just order a new one?

thanks,

Wilson
 

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PALMER84ONE

PALMER84ONE

Yep, sounds like it has given up the ghost. Suspension rebuild is way cheaper than buying new and you really don't need to go new. Pull it, take it in or ship it.
 
L

Labradorcoaster

Sounds like a plan, given my location I will remove it and ship it to the nearest Yamaha dealer. I had noticed a small amount of clear oil on my shop floor earlier this fall, wondered about it, figured it was from having changed the transmission oil..

thank you
 
O

ossagp

Do what you want about who to ship it to. Some dealers may actually be good at suspension fixes and setups. if you find one let me know. There are lots of good suspension shops ones can rebuild, refill, and revalve for your riding style. usually at better than dealer rates. Taking one apart is really pretty straigtforward if you have a manual. If you dont have a manual now is a good time to get one. If taking one apart to see if it has leaked seems to be too much bother now, my guess is that your best bet for riding on dirt comes with a derailer. Good time to find out though. You already may have gathered that it is a good thing to make sure you check out the source for any fluids you find under your bike.
 
L

Labradorcoaster

"If you find one let me know" :). I hear ya. Over the years. I have gone thru lots of shocks on snowmobiles,Yamaha, Bombardier etc, it is always dump and replace with new. But..as a "long in the tooth" DIYer I will indeed give the rebuild idea a go.
 
L

Labradorcoaster

Yup... My sentiments also, called a dealer who quoted a replacement price of 1,300.00$ Can. but she was very helpful and gave me the adress of a suspension/shock shop in Quebec that quoted me a rebuild price of approx. 250$.
when I mentioned the low hours on the bike he asked me if the bike was stored in cold temperatures. when I told him that I had been out this winter in -25 C he told me this was the most likely cause of the shock failure. Super cold/thick oil caused the premature failure of the oil seal. They do replace the OEM seal with a higher quality seal.

But... does this mean that I risk blowing a seal if I use my bike in cold temps. Had a blast this winter as the snow and Ice expands my playground considerably.

Interesting that bike shocks are not designed for these temps, but other shocks are...
 
SRAD97750

SRAD97750

Moderator
Staff member
Labradorcoaster:
But... does this mean that I risk blowing a seal if I use my bike in cold temps. Had a blast this winter as the snow and Ice expands my playground considerably.
Click to expand...
The suspension shop should be able to set you up with a fluid that will handle these temps. Just let them know what you actually plan on doing with it. -BIG DAN:thumb:
 
2smoke

2smoke

When you have your shock serviced you may want to have it serviced with a lighter weight oil. This may help you with the extreme cold conditions you ride in during the winter. I must be some kind of pansy. I wont ride if its colder than 40 in the winter time.
 
O

ossagp

I have been riding and storing motorcycles in Alaska for 40 years and that is the first time I have heard that story. I have two yamahas that have been stored in out door sheds as well as Hondas and a Kawasaki. No problems in storage so far b who knows, maybe in the next 40 years.
 
O

ossagp

Labradorcoaster:
Yup... My sentiments also, called a dealer who quoted a replacement price of 1,300.00$ Can. but she was very helpful and gave me the adress of a suspension/shock shop in Quebec that quoted me a rebuild price of approx. 250$.
when I mentioned the low hours on the bike he asked me if the bike was stored in cold temperatures. when I told him that I had been out this winter in -25 C he told me this was the most likely cause of the shock failure. Super cold/thick oil caused the premature failure of the oil seal. They do replace the OEM seal with a higher quality seal.

But... does this mean that I risk blowing a seal if I use my bike in cold temps. Had a blast this winter as the snow and Ice expands my playground considerably.

Interesting that bike shocks are not designed for these temps, but other shocks are...
Click to expand...


I am not surprised. Works the same way on this side if the border.
 
L

Labradorcoaster

Yeh go figure, as I mentioned earlier I have gone thru quite a number of suspension shocks on my snowmobiles but get somewhere around 8-10,000 miles or more before failure.
I ordered from E-Bay a 2007 YZ250F rear shock 199.00$ +shipping! assuming that it will fit my YZ250 2 stroke...

still plan to send the other shock out for a rebuild, figure the cost will be around 325$ total
 
O

ossagp

pretty different frame. you might check on a site like bikebandit.com to see if any of the linkage is the same etc. measure yours from eye to eye and have the owner of the one on ebay do the same. Some of the shocks off the steel framed ones would fit from two stroke to 4 stroke, I know.
 
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