Fork oil

Does anyone know the weight and quantity of fork oil that goes into the RSU Ohlins front forks? Thanks.

Standard Forks , 19 cSt = (5W) , 488 cc

Thanks, Mark.

The reason I asked about the fork oil is because I want to try 0 weight oil. Does anyone know if the fork oil in it can be removed without taking it apart? thanks, Mark.

Do you mean a drain plug like a vintage commando ? I don't think so. But you could pull some out with a pump ? Measure what you pull out ? It might be easier to take it apart.

I was hoping someone would tell me that the fitting that holds the compression damping could be unscrewed and drained that way, then refill thru the top.

And the answer is------------Yes you can. Altho it's a little difficult, but doable.

My purpose in these posts was to see if I could work on the Ohlins RWU forks because with the compression damping open all the way my bike had a very nasty reaction to short sharp bumps in the road like a pothole, but not that deep a hole. It acted as if the forks didn't compress at all, transmitting the bump to the bars as if I was on a bicycle with no suspension. I drained the fork oil and refilled it with Red Line "like water" oil, 1 pint in each leg. I'm very happy with the results and so are my wrists. If you have a similar complaint, you might try this

Hello , Just wondering if you may have taken any photos of the procedure ? If you can post them etc. So you removed the cap at the fork bottom and then you pumped the forks into a tray . Cleaned up the oil off the wheel , opened up the top etc. It would be really great if you gave a little more details and posted some photos. This sounds like a worthwhile endeavor.

You need two items that are pretty much required. I use the Pitbull rear stand to support the bike while pumping the old oil out and some sort of jack, like a bottle jack to support the bike under the pipes when you take off the top caps of the fork tubes. So with catchpans under the fork tubes, take the compression fitting out of the bottom of the fork tubes, 17 mm. Making a big mess with the bike on it's rear stand, pump all the oil out of the forks. I used a large disposable syringe to get the last of the oil out of the compression fitting cup.
When you're happy with that, jack up the front of the bike and back off all of the fork spring preload, 17mm. Back off the allen heads that hold the top of the fork tubes, and then use a pin wrench [I used the one that came with an angle grinder] to remove the fork caps, they should be hand tight only. They will be fully loose when you hear them clicking.
At this point, lower the front of the bike until the top of the fork spring is revealed as the cap pops up. I had to remove my handlebars because I have risers that interfered with the caps and I'm not sure if that will happen without them. Reinstall the compression fittings and with a suitable funnel, pour the new oil in from the top. I used Redline "water weight fluid" and poured the contents of the bottle, 1 pt. into each leg, 2 pts. total. That's slightly less than the factory fill. Jack the front of the bike back up and rethread the fork caps and reset the spring preload. And as my Blighty friends say, Bob's your Uncle!!

Sounds good . I can picture every step . Thanks .