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Offline Supermarine

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Re: Blown Fork Seal Repair - [How To]
« Reply #20 on: June 16, 2017, 01:19:33 AM »
Just like to add you dont need to remove the DDC cartridge, unless you want to strip it 100%, same goes for the right side if you are only doing seals.The right side(non ddc side) is actually a bit trickier if you dont have the right spring compressor.As mentioned in this nice how to, there is not much oil in the DDC fork as the cartridge takes up a lot of space, right side holds more.

Offline wippet

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Re: Blown Fork Seal Repair - [How To]
« Reply #21 on: April 07, 2019, 01:16:11 AM »
Excellent write-up and excellent photos - well done  :028:

I've hit 2yrs with my 2016 s1000r so am doing the fork oil change as per the BMW maintenance guide, however the DDC fork oil is basically clear and looks brand new. Having read through this it's probably because the DDC damper rod is a sealed unit so you're not actually changing the oil inside this.

Just wondering whether anyone has changed the DDC damper rod oil. It seems like just changing the oil thats simply lubricating the fork leg is a bit of a waste of time at 2yrs and 12,000km's, especially when the oil in the damper rod is what's doing all the work. The oil in the right (non DDC leg) was a bit darker but without a compression tool I haven't worked out how to dissemble it and properly pump the oil out of it yet - but also don't want to buy a compression tool if it's also a sealed unit and I'm just changing lubricating oil?

I've got the BMW Service Manual and it's not very specific on this.





Online SimonUK

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Re: Blown Fork Seal Repair - [How To]
« Reply #22 on: April 07, 2019, 01:57:04 AM »
Very helpful indeed. I also read somewhere else that some dealers are not doing fork oil at 18k miles(on street ridden bikes), because all the onbes they have done so far have just resulted in changing out clear oil. this is also my experience, having done the oil change on mine and a buddies S1kR at 18k each. both times the oil coming out looked pretty clean and fresh with no bad smells.

Offline Toolman

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Re: Blown Fork Seal Repair - [How To]
« Reply #23 on: January 24, 2020, 12:17:15 PM »
Have I understood this correctly? The DDC cartridge is the only damper unit in the forks, and is a sealed unit. When the fork oil is changed this DDC oil is not touched? I'm due an 18,000 mile service soon, the quotes are pretty expensive and frankly if what I've said above is true I can't see the point in a fork oil change.  Any ideas anybody?  :440:

Online SimonUK

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Re: Blown Fork Seal Repair - [How To]
« Reply #24 on: January 24, 2020, 12:29:52 PM »
no, there is still oil in the forks as per normal.

the 18k quote is expensive because they strip the bike down:
1) valve check - body work, tank, airbox, etc removed
2) forks - front wheel removed, forks removed and opened up

Offline Toolman

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Re: Blown Fork Seal Repair - [How To]
« Reply #25 on: January 24, 2020, 12:36:50 PM »
Simon, sorry I didn't explain myself properly! I realise there's oil in with the springs etc, and that can be changed relatively simply by remove the caps from inverted forks? But the oil in the DDC cartridge, the stuff that actually gets hammered through the shim stack, can't be changed?
Thanks for your help!

Online SimonUK

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Re: Blown Fork Seal Repair - [How To]
« Reply #26 on: January 24, 2020, 01:55:36 PM »
In the BMW maintenance DVD, all that get changed is the fork oil in the fork tubes.

Offline Toolman

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Re: Blown Fork Seal Repair - [How To]
« Reply #27 on: January 24, 2020, 02:15:38 PM »
Thank's, that's pretty much made my mind up, I honestly can't see the point in changing the oil that doesn't do much, when the important stuff can't be changed! Dave Moss, the suspension guy, says it's vital to change fork oil due to the amount of work it does through the shim stack, but we can't.... maybe this is a bit of an issue with our type of forks?

Offline wippet

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Re: Blown Fork Seal Repair - [How To]
« Reply #28 on: January 30, 2020, 01:11:00 AM »
Pretty much, certainly no point at 7500miles (12,000km) like I did, and not at 18,000 miles (29,000km) by the sounds of it above (street ridden bikes).

Next time around I'll just drop the bolt out of the bottom of the fork and try to drain the oil that way (or suck it out with a hose). Dissasembling the whole leg just to pour some lubricating oil out was a lot of work for no gain.

Offline clik

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Re: Blown Fork Seal Repair - [How To]
« Reply #29 on: February 16, 2020, 09:29:29 PM »
Respect for your time to make this repair public on the forum  :046: the time you have taken to type and edit you repair will have taken more time than for you to just repair your own bike
The fact you have taken time to explain to others on this forum  is excellent   
« Last Edit: February 16, 2020, 09:36:10 PM by clik »

 


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