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vanvranken
01-16-2016, 10:19 PM
86 Honda ATC 250r,do you put air in the forks???what are the valves for,letting air in or out???shop manual does not give much info on this.

onformula1
01-16-2016, 10:33 PM
For the best performance it is best not to use air in the forks, they will be harsh and harder on the seals. Bleed the forks with the front wheel off the ground.

I can go on and on with the reasons and the history, but they will simply work better set at atmospheric pressure or even negative pressure.

yaegerb
01-16-2016, 11:00 PM
Valves are for letting air out. Ask me how I know......

bradkeskey
01-17-2016, 02:20 AM
I need to replace my seals on my 250es. Anything I should watch out for. She's pretty bouncy.

vanvranken
01-17-2016, 05:51 PM
Valves are for letting air out. Ask me how I know......

how do you know?

yaegerb
01-17-2016, 06:45 PM
Glad you asked. I rebuilt my forks on my 250r and added .05lbs of air and blew both seals out. Then I was talking to Rob Selvy one evening and he said that the schrader valves are used ONLY to let air out. This was also confirmed with Milner (onformula1) on this site. Onformula1 is very knowledgable about suspensions and he will likely be able to explain why you don't add air.......

vanvranken
01-17-2016, 07:17 PM
thank you yaegerb.mine seem soft or I could just be me.

vanvranken
01-17-2016, 07:33 PM
I read on hear somewhere about pvc spacers??size?

vanvranken
01-18-2016, 06:40 PM
just found this in my shop manual 85-86 Honda ATC 250r.226611

vanvranken
01-18-2016, 07:19 PM
must be a miss print.70 kpa is 10 psi.any ideas how to get a couple pounds in??

vonsmacken
01-31-2016, 11:08 PM
bicycle pump. you'll want to put in a few pounds more than you'd like to end up with because you'll loose a few pounds just from checking pressure with a gauge. it's hit and miss at it's finest, but eventually you'll get real close to your desired setting. repeat.

RamsesRibb
06-04-2016, 07:46 PM
your shop manual has a discrepancy. 70 kpa is ~10 psi, not 1.0 psi.

10 psi is the maximum recommended pressure.

Something else I'd like to point out is that finding an off-the-shelf gauge that can accurately measure at one psi and below would be like finding unicorn turds. A gauge of that accuracy and precision would be found in a scientific catalogue and come with certification.

Google says 70 kpa is 1.45 pounds/square inch