Boy has a kx 85 and i was wondering what fork oil to use and how much and how to drain it?

Question

I was told to release air screws on forks but got no back pressure or oil squirt so if fills like it has no fork oil HELP ?

Answer 1

As I recall from my son's motocross days this is an involved process. You determine the action of the forks by how much and what weight oil you use. I would do some research on the subject of suspension for the bike. Your local bike shop should be able to provide all the information that you need.

Answer 2

I'm not exactly sure what you mean by back-pressure or oil squirt but oil is not supposed to squirt out the bleed screw even if the fork is fully compressed. Your best bet would be a service manual. I'm pretty sure stock oil is 5w, the weight of the oil can be changed to adjust the feeling of the fork. If you have anymore questions e-mail me, I have been working on dirt-bikes for 5 years doing all types of maintenance and rebuilds.


Edit:
Yes, you should release the pressure after each race, but sometimes there wont be pressure so don't be alarmed if there isn't. Changing fork oil can be kinda hard depending on mechanical ability. Remove forks from bike. Then first start by recording the compression and rebound settings. Then unscrew the fork cap (part 44029) and simply dump out the oil. Using new oil fill the fork up to the right level (refer to user manual) if the oil level is given in distance in means distance from the top of the fork with the outer tube all the way down, if its in volume, it simply means volume of oil. After putting in new oil, tighten down the fork cap and your done

With some forks it is not this easy, sometimes special tools are needed, I highly recommend fallowing a service manual closely! With the manual you should have no problem. if you have no mauel or doubt your mechanical abilities I would deffanitly take it to a shop, or atleast find somone that has done it before to help you.

Use this link for part numbers I refrenced
http://www.motosport.com/offroad/oem.php?make=KAWASAKI&type=DIRT&model=KX85&year=2004

Answer 3

Chris B's post is on it. It's not that difficult, but not that easy either, especially the first time around. I've never worked on dirt bikes much, but have done quite a bit of work with street bikes and drag bikes. The forks need to come out of the triple clamps, shouldn't be a lot of stuff in the way on your kx.

Break it into little steps. You can do it!

Answer 4

If you don't know; have someone show you. This is not that easy you shouldn't be guessing what to do.

It ain't brain surgery either but I recommned taking it to a local shop, watch them do it, then get the tools you need and try it next time.

Good Luck