Topic: Did the old owner FUBAR this fork seal?

[swoardrider]

The little spring in the rubber isn't looking too healthy. how important is the spring thingy?

Thanks in advance.

[Gordon]

Does it leak?

If yes, replace it.  If no, leave it be. 

[Jerry Rxman Griffin aka MuthaF'er]

+1.

And.... if you do replace it (not the smallest job either) get a piece of PVC pipe to drive the new one back on. Get one from Honda and not aftermarket!

[martin99]

If you can see the spring from the top the seal is upside-down isn't it?

[70CB750]

If you can see the spring from the top the seal is upside-down isn't it?

Yes.

[martin99]

IMO - bite the bullet, replace that seal and the other one if it is also the wrong way up. I've known incorrectly fitted seals to fail quickly, and the last thing you want is brake pads covered in fork oil.

[LesterPiglet]

Some seals have a spring on both sides.

[robvangulik]

Some seals have a spring on both sides.

True.
But they always have a flat top to tap them in their groove!

[strynboen]

some,, puts 2 smaller seals in..to get sealing from both sides..and (they kosts less standart thing in europa)metric stuff

[robvangulik]

some,, puts 2 smaller seals in..to get sealing from both sides..and (they kosts less standart thing in europa)metric stuff

Yep, they did put in double seals (even I did that, long ago) but modern seals do their work much better. And you also double the stickslip, making the forks much less sensitive on small bumps!

[swoardrider]

Thanks guys.  Your knowledge on this forum very much appreciated.  Looks like the brake side fork is starting to leak so I will be replacing both. I'm not surprised, as the PO was a hack, and mickey moused almost everything on this bike.   This summer I've unexpectedly become a slave to the CB750, and this forum is my new bible.

[swoardrider]

While on the topic of forks, do all CB750k's have the mounting holes on their right forks for a dual brake set-up?  If so, why did the factory do that?

[robvangulik]

Did you ever see a CR750, or any CB750 racer for that matter, with a single disc?
Well, thats why.....

[tlbranth]

If you can see the spring from the top the seal is upside-down isn't it?

Nice catch

[BobbyR]

If u do decide to change the seals, you must really polish those fork tubes. If you can feel it with your fingernail, it will leak fairly soon. It is upside down. Honda seals seem to last very well.