The CB1100 Community Forum

Thanks for the advice and the hot tip about the clear packaging, i have no problem with any of my seals at the moment but i want to learn about things when the knowledge is available, very difficult to beat first hand experience

Only replaced fork seals on one of my bikes, but I did clean the bugs off frequently.

This is an obvious area for "prevention is better than cure". A wash down and polish/lubricate after long rides would seem to pay dividends in fork seal life.

Reviving this thread...

Was ready to head out for Christmas Eve day ride, but noticed a few drops of oil on the floor below the left side fork seal. Ruh-ro.




Well, times like these is what I bought the W800 for, so it got the legs stretched instead of the CB1100. After a wonderful 40 degree ride tarnished slightly by a much colder than that drizzle the last 5 miles of 50, I started thinking about the fork seals. I remembered and found this thread, and knew that I had bought the tool, but not the motion pro one, but rather the Rhino Seal Doctor one.

I think it was about $20 5 years ago. I think I bought it instead of the motion pro because it was sturdier...IDK, or maybe because it was red.

I actually bought it for my KLR650 at the time because it had leaky seals. It worked once, but a year later started leaking bad...new seals solved the issue then.

So I'm hopeful the seal doctor device works for the CB leak.

After wiping down the fork and cleaning it, carefully pried up the dust seal


Inserted the hooked end and circled the fork seal 2x


And this is what came out


Yum! Although...does that look like "meant to be there" grease type material to keep the fork oil in?

Or just build-up that was causing the leak?


The other end of the tool is for cleaning the inside of the dust cap


Compressed the forks several times, a bit of residual oil, and did that a few times till all dry


Video of clean check:

[url=https://i.imgur.com/pBhBLP1.mp4]https://i.imgur.com/pBhBLP1.mp4

Did the same for the other fork and the same built-up pasty material was removed. Forks are bone dry. Now I need to test ride to confirm.

Coolio pdedse.

Good work, pdedse.

Hi pdedse, the strange "grey matter" you found is simple sludge - not a grease meant to be there. At least color, origin and amount, together mileage and location points this way. Sludge is created by squeezing oil and water through small spaces, over and over and over again. And unfortunately it does neither preserve the desirably properties of either water or oil. Very good that you got it out. It means probably that some water got past the outer seal.

Fntastic work Pdedse, done the same on my upside down forks on the cb1000r, caked-on stuff on the inside of the forks
worked its way in between the seal lips, the front fender has some protecting shields build in and they do a fine job but it still needs some attention from the owner for best results.

First thoughts were to replace the seal, thought about it and decided that a seal does not wear out at 20.000 km!
Did the same thing as you did with perfect result, i could feel something at the back of the fork leg so cleaned both with autosol and maintain a regular cleaning routine, some insects leave a sticky resin like liquid behind which in the wrong place can pose a problem, thanks for the very nice clear pictures!

Explains why some modern street bikes have adopted the clunky plastic stanchion protection mechanism from offroad and adventure bikes.