Clutch Slave Cylinder Leak on 2nd Gen

I noticed that on my '86 VFR 750 that there is no resistance at the clutch lever. I then noticed that the hydrualic fluid has leaked out down around the clutch slave cylinder. By looking at this diagram, does anyone have an idea as to what is causing the leak? Is it possible that it is just the gasket (#9) or some other part within the assembly (#8) or something else altogether?

 

If the leaking fluid is hydraulic fluid, then a closer examination of the 10, 11, 12 area would be a start.

 

I had a similar problem with mine.

I bought new seals and gaskets, tore it all down, and found that the fluid was full of rust and sludge. Cleaned it well, put in the new seals, and buttoned it up. Works like a champ.

It takes an eternity to get the master to reprime after draining, I found that using this setup works great:

http://vfrworld.com/forums/mechanics-garage/17748-custom-motive-power-bleeder-adapter-vfr.html

But I really need to add pics to that.

 

These guys are on the right track. Probably piston seal #12 has failed. Replace that and the pushrod seal #18 for sure.

 

Thanks guys. Based on your feedback, I pulled it apart and noticed that the piston seal #12 was leaking. To be safe, I'm also replacing the push rod / oil seal (#18) and the gasket (#9). I'm just hoping that all parts are still available.

 

they all still are, I replaced all of those last winter on my '86.

 

Refill the Clutch doing this:

Clutch/Bleeding-filling - SabMagFAQ

 

Yes, I got the order confirmation today and the parts are still available. I've had problems with out of stock / discontinued parts for all of my '86 bikes at one time or another.

 

I've had vastly better results at a dealer than online, but boy do you pay for it. I tried to order a rear master rebuild kit (piston set), and it was on indefinite backorder via the online houses, and my local dealer had it in <1week.

Dealer wanted 20-30% more for it, though. But they also carry Aprilla.

 

That's a nice way of doing it. I already had the Motive PowerBleeder, for using with the cars, where it's a total godsend. So I made an adapter for the bike. Setup is <5 minutes now that I have it built, and the bleeding goes super easy, and nary a bubble in the line.

 

I finally finished the rebuild of the clutch slave cylinder. I do want to say that I spent a good 2 hours trying to bleed the clutch the old fashioned way and came to the conclusion that I was just wasting my time. I went out and bought a MityVac brake bleeder. Once I had everything hooked up, the clutch was bled within 5 minutes. Thanks again to masonv45 for the "how to" link. I used that approach and it worked perfectly. Also, the $48 spent on the MityVac was worth it.

 

I helped a buddy out with the same problem just this past summer it was the seals and gasket! His bike runs great now, and yes the fluid thing can be a pain to get all the air out of the system! But it will take some time then your good!