showa rear shock

I am preparing to change the oil in my Showa rear shock (crf250x). A few weeks ago, I successfuly changed the oil/seals in my forks, so am ready to tackle the rear shock. My question is, do I have to use compressed nitrogen to fill the bladder as per the manual/instruction video? can I use compressed air? why or why not? It am having a hard time finding someone with compressed nitrogen (I heard that some tire stores are now using nitrigen). I do not want to buy a regulator/bottle of my own, so I was wondering if compressed air would be fine? thanks

The sticky in the 450R forum has a DIY suspension revalve that covers the rear shock as well, including refilling the bladder.

Do Not use compressed air, nitrogen is used because it is not affected by heat like air is. Nitrogen will give the shock a more consistent feel. Most motorcycle dealers or shops will have nitrogen. I know in my area finding one that knew how to use the equipment or had it in working order was the biggest problem. Look around, usually between $5 and $10 for the shock to be recharged.

Small regional Air Plane repair shops have it also. They use it for tires.

Thank for all the great thoughts!....great idea about regional airport. Also thought about local welding gas supply shop. Two of the three bike dealers that I use (seldomly) here in north Atlanta do NOT do forks or shock rebuilds. The one shop that does do forks wants $300 labor plus parts...2 week turnaround. Having (2) crf250x's and knowing this is part of rountine maintenance, that's why my son and I decided to do the forks ourselves, and are now preparing to do the rear shock. parts at babbittsonline are cheaper than at servicehonda. Any other great website for honda brand parts?:thumbsup:

Service Honda 12010-KSC-773 CYLINDER HEAD ASSY. $227.07

Babbitts on-line 12010-KSC-773 CYLINDER HEAD ASSY. $271.93

I have no financial interest in either company.

If you're in greater Atlanta, you should be able to stop by either of the 2 big roadracing suspension guys there, and they should be able to fill it precisely while you wait (you can't fill it, and then measure it with a tire guage, by the time you check and remove the guage, you've lost a tiny burst of air which matters to such a tiny reservoir). or

Mike at Thermosman is a great suspension guy, but call first, he's on the road at races and test days frequently.


by the time you check and remove the guage, you've lost a tiny burst of air which matters to such a tiny reservoir).

you loose about 7-10 psi when you check after filling it, so fill it too 152 psi, then check you'll be around the spec of 142 psi.

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