rm 125 fork seals leaking?

Question

i have 125 rm and the fork seals r leaking and i dont know how to re fill them .and does any one know if i can change the seals on them myself.but how do i re fill them can i make it .for a week or two on felling them up but i dont know how any one give me some help .please thank u

Answer 1

Don't just keep adding oil Marco- it will leak down onto the brakes and tyre. You need to change the seals. If you don't, tie a rag around the top of the fork to absorb the oil- but be aware every time the suspension moves, oil is forced out. It will be just a few miles before there's oil everywhere: and oil-contaminated brake pads will need replacing.

This is not a difficult job, but if you've never done any work on your bike you might want to either get a workshop to do it, or get a mechanically-minded friend to help you. Even if they've only worked on cars, they should be able to do it.

There is a bolt in the base of the fork leg: take off the front wheel and remove this bolt. Catch the old oil in a container. Then, carefully remove the fork tops with a socket. At this point, remove the fork legs from their clamps on the bike, being careful to remove each internal part and keep it in order. Use the inside leg like a slide hammer, pull it a few times and it should pop out of the outer fork tube. This will have a large round spring clip in it, holding in the seal. Prise out the clip, then the seal, with a large screwdriver, working around it a bit at a time.

Clean everything and fit the new seals- available cheaply from your motorbike shop, or take the old seal to a bearing shop. You have to gently hammer the new seals into place without damaging them. I use a plastic tube made by grinding the top off a plastic bottle lid: place this over the fork seal and gently tap it all around with a hammer, settling it into place. Once you can just see the groove that you prised the spring clip out of, you can replace the spring clip and use the plastic tube to tap the spring clip back into its groove. The clip might be rusty: just clean it up with steel wool or similar.

Now reassemble the forks, fitting the base bolts before the top fork caps. Pour in the appropriate volume of oil: ask your dealer for this measurement. Ignore how much comes out. Use Automatic Transmission Fluid if you don't have fork oil.

This is the procedure, but you should get hold of a workshop manual. You can borrow these from your local library. If you can't get one for your bike, get a similar one- but get the right fork oil measurement from your dealer. Oh, and do change both seals because if you don't the second one ALWAYS blows soon afterwards.

Answer 2

Upside down forks or not; A fork is a fork and no you can't just pop the top and refill them when they get low...You need to rebuild them ie replace the fork seals.
It is a very messy and time consuming job, You will need to precisely measure the amount of right-weighted fork oil for your specific year Rm 125.
It is a job for someone who is experienced. Our shop charges $200 to do this; Seals and oil included. If you can afford it right now, you tie and bandanna around the fork to keep the oil off your brake pads and rotor as a temp fix...Good luck.

Answer 3

Always give year, make, engine size and model # when asking questions. We need all of that info to give an informed answer.
If it's a latter model with upside down forks, bring the fork tubes to a shop and have them install the fork seals. It's a complex procedure not recommended for newbies.
If it's an earlier model with conventional forks, with a couple of special tools and a shop manual, anyone that is mechanically inclined should be able to replace the fork seals.
First buy a shop manual to decide whether you want to attempt the job yourself.
http://www.motocom.com/motorcyle/
You're still going to need a shop manual to find out how much oil the forks take. To much oil and they'll feel hard as a rock. to little and they'll bounce up and down like "pen" springs.