99 CR250 Rear shock

[MXcruiser]

I have a question about a rear shock for one of my bikes. how can you tell if the rear shock is charged or not? Is there a pressure we should be running (schrader valve) and if so seems there are tires shops filling tires with nitrogen now will they be able to put enough pressure in one? I am not too cheep but have 10 bikes and it sure gets expensive when changing pistons or shocks or rebuilding forks! Any real advise would be welcomed!

 

[Richard S.]

When was the last time the shock was serviced? If it's been a while, it probably needs a rebuild. If it's low or out of nitrogen, it needs a rebuild - not just a n2 charge.

Push on the seat. Does it feel like there's damping or just spring? If it's just spring, it needs a rebuild.

The tire shops can do it if they can regualte up to 150psi. Although some may not want to just for liability reasons.

 

[Pete Payne]

Also as the N2 gets low the seals seem to weep a bit , once the N2 is gone the shock also seems to hang down in the stroke and not rebound properly .

Like Richard said , if its been a while it needs a good going through .
Recomended oil change intervals are between 20 and 30 hours of riding time.

 

[kawamaha]

yesterday I measured the rebound time of a shock without the spring. it depends on type of shock and rebound clicker position, but it should not take more than 5 seconds for rebound (reb-clicker fully open). then you know there's enough n2 in there.
but like the other guys said, without nitrogene it leaks and sucks air, you will notice this