The 2004 models are 135cc's in each leg, my guess is the 2003 is the same. I wouldn't put any degreaser in a suspension fork, clean with rags and rubbing alcohol.

 

"I've been trying to read up on servicing my forks. I still can't even find a service manual for them. I can find every manual for any model other than that . But, I should get by with the information I've collected so far. What I'm wondering is how much oil to replace with? I'm not getting my full travel and I read that lowering the level of oil can help with that. I don't know by how much though. Does anyone know of the ml of oil that is good for that model fork?"

mtnbiker72 is very close, the correct oil level for the 03 105mm travel MX Pro is 130ml for the coil and the air versions. I know, I've got an old MX Comp 105mm air on the wife's bike that is still going strong and still have the 03 oil level chart. :thumbsup:

"Also, is it ok to clean the internals with a degreasing spray (to make sure all the old gunky oil is out) before refilling with the new oil? I don't know if there are components that the degreaser would interfere with, that the oil would not be able to re-lubricate again."

That depends totally on the degreaser and how completely you can rinse it out or remove it. I've found that straight Simple Green is fine and won't harm rubber or plastic components. Most other degreasers are too harsh and can damage rubber or plastic parts. However, YOU MUST get it all rinsed out before putting the fork back together. Any degreaser (even tiny amounts) left in the fork will affect the new oil that you put in. So it is better to simply use clean rags and alcohol to clean the internals. Alcohol leaves no residue and dries very quickly.

Good Dirt

 

Thanks guys! Now to just make sure I got all the right tools and I'll dive in

 

Are you going to take the fork apart completely or just an oil change?

In case you are going to change the oil, be sure to cycle the fork right after draining the oil, so the particles will be suspended in the oil and you'll be able to take them out while draining the oil. If you don't do this, the big particles will remain at the bottom of the fork.

In any case DON'T use any degreaser. A clean rag (make sure that it does not leave any fuzz) is all you need to clean the internals in case you take it apart. :thumbsup:

About the oil change: take the oil volume recommendation as that, just a reference. The only way to get full travel is to adjust the oil height via trial and error to your liking. In my experience with a Mx Comp, the same oil volume in each leg will lead to different oil heights (distance between the crown and the oil level with the fork fully compressed) in each leg, and I prefer to fill each leag until I reach a certain oil height (the same for both leags) and then testing the fork.

Too much oil an you won't get full travel, too little and you wil bottom out easily AND probably feel undampened rebound.

Cheers :thumbsup:

 

Thanks for all the help guys. I managed to do the clean and change with the minimum of hassle (except for the oil that I got everywhere) and got a bit more travel without bottoming out.