fork bleeding valves

[glennMember]

I have fitted fork bleeding vales to the DRZ 400.
My question is .

How come when I walked past the bike and pressed the bleeder valve down there was an expelsion of air, I released the pressure following a short ride and I had not compressed the forks at all .
the bike had sat for a couple of days.

should i operate the valves before each ride?????

why would there have been a build up of compressed air if the bike hadnt moved????

Boony

[alanMember]

don t no boony my bloody ktm doese the same

[DavidMember]

Boony I have them in all my Boys race bikes and they are fantastic, the oil gets emulsified and aerated just doing what it is designed for, dampening the compressive and rebound forces, with this aeration you get a build up of pressure and this in turn makes the forks have a little more preload and your plush feel now becomes hard and sharp, you should elevate the front and bleed after every ride and Bobs your uncle, I actually do it after every moto for the boys and it keeps them constant in feel for them, they both notice it when I forget to do it,
Hope that helps

[glennMember]

what about the pressure build up when I have released it and left the bike stationary.
I just went to the shed,(beer fridge) and pressed the valve and sure enough there was a faint sound of air coming out of them???

why elevate the bike after each ride??

[Anonymous]

My WR does the same thing Boony – its been in the shed since the start of December and it always has pressure in the forks when I hit the bleeders.

I made up a mobile stand that I put both the WR’s on for two reasons:

1. Keeps them off the ground – no weight on the suspension, and
2. Makes it easier to move both of them out of the way when I need to.

[timMember]

I don’t know but could the build up of pressure in the fork be caused by changing air temp, just a thought!

[Jeffrey SmithMember]

As your bike sits there it may settle a little after a while, also, as Medogrocket said, the change in temperature could cause it. The air sound could be either air going in or out depending on what temperature change has occurred.

p.s. I remember I read somewhere that you are meant to release the pressure with the front wheel off the ground I think, may even have been some Teknik information.

[Author]

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