Weak(?) rear shock 2001 m600

[JoeP]

Hey, thanks for all the help. This is a great forum! 

Yes, it's a stock Sachs and it's 10 years old with 5k miles. I wonder if it just needs to be repressurized. Does it also have oil that needs replacing? At this point I'm looking to just get a new (to me) shock.

[Howie]

As long as the chrome on the shaft is good you can overhaul it, new oil, if you want, revalved for you, pressurized and all should be good.

[Thermite]

If the spring was compressed all the way for a long period of time it may have taken a "set" and not be able to return to its full length.  Measure the uncompressed length and compare it to the stock length to see if it 's okay.  Or just plan in installing a new spring of the correct rate based on your weight as part of the project.