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red7

Relieving front fork pressure

15 posts in this topic

I just picked up my '06 YZ450 from a dealer in Utah and he said I should probably relieve some of the pressure since I'm going from 6000' to sea level. Is this correct? What do I do and how do I do it?

Thanks!

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There is a bleeder screw on top of the forks. Don't get it confused with the adjuster screw that is in the center of the top. Have your bike on a stand and unscrew the bleeder screw with a small flat blade screwdriver. You shoudl hear a hiss as air escapes. Then simply screw it back in.

It is a good idea to do this on riding days also to be sure that you don't build too much pressure in the forks due to heat. It takes a few seconds to do.

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I bleed mine almost every ride. Its amazing how much pressure they do build in a short period of time.

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Thanks guys, that's exactly what I needed to know. Maybe that's why my front suspension seems rock hard. I know it still needs to breakin and that it will never be as smooth as my WR on trails but I had to white knuckle it the day I broke it in 'cuz any little bump or rock would want to throw me off the bike.

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Also be sure to be careful not to cross thread this. It is easy to do if you are not careful....

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make sure the front wheel is off the ground when you do this....

Why? I do mine with the bike on the kickstand all the time...not arguing, just want to understand.

Thanks,

Birdie

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The proper amount of pressure is realized by volume. When the bike is on a side stand there is weight on the fork (sag) effectively reducing the amount of air going into the fork.

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The fork is supposed to have atmospheric pressure in it when fully extended. If you relieve them while they are partially compressed, they will have a partial vacuum in them when extended, which can contribute to pulling dirt into the seals.

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The fork is supposed to have atmospheric pressure in it when fully extended. If you relieve them while they are partially compressed, they will have a partial vacuum in them when extended, which can contribute to pulling dirt into the seals.

bingo... this can make your fork seals go boom :lol:

I have the moose bleeders and im quite happy with 'em.

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Ooops, I did it to mine while on the ground. Should I not worry about it or put it up on a stand and open them back up? Or are the valves one way and i just have to wait until pressure builds again?

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Just when I thought I knew something :lol:

Thanks for the great info guys, you've done your good deed for the day:thumbsup:

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The fork is supposed to have atmospheric pressure in it when fully extended. If you relieve them while they are partially compressed, they will have a partial vacuum in them when extended, which can contribute to pulling dirt into the seals.

Thanks...I never thought about that...learn something new here every day.

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