1979 YZ 250 shock ID

Bultaco
Posts
1744
Joined
1/20/2014
Location
Planet, VT US

IMG 3422A riding buddy just bought a used 1979 YZ 250.  Good condition,   He has not removed the shock yet but here’s a photo of the part we can see. Is this an aftermarket shock? Modified stock? I was under the impression that the stock shocks did not have a Schrader valve?  Just curious. When time allows, we’ll get the shock removed and get a better idea of what is  installed. 
 

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450exc115
Posts
708
Joined
11/6/2014
Location
Hebron, CT US
12/16/2025 12:10pm

Stock that someone modified to have a Schrader instead of the normal rubber bleeder that you need a needle for.  I've modded these and used a Racetech or KYB 46mm valve piston and shim stack along with remote reservoir.  You can use just about any modern 46/14mm seal head in them too.  

 

2
sandman768
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7947
Joined
3/21/2014
Location
Saratoga Springs, NY US
12/16/2025 1:13pm

I have an NOS upper shock bearing …if needed…

1
12/17/2025 4:27am

I have the same bike and it doesn't have the Schrader valve on the shock.

Bultaco
Posts
1744
Joined
1/20/2014
Location
Planet, VT US
12/17/2025 6:39pm

Thanks guys. Good info. 👍

1

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