It's finally running again. I rebuilt the master and slave cylinders and the clutch is 100%. Thanks to Kyle's step through, and a little help from my Clymer manual. The only minor issues I had, were that I had some trouble with the C- Clip on the master cylinder, it was siezed and my ring pliers the auto zone version did not reach far enough, so I had to work it out with WD40 and a jewelers screwdriver until I could grip it with a needlenose and tear it out. The slave cylinder was just as bad with the oil seal being broken and the metal insert was rusted fast and had to be dug out in much the same manner. The amount of hardened material in the slave cylinder was astonishing, I wonder how the thing worked at all.
Oh and I did the sightglass fix too, I had a machine shop measure the opening for the sightglass, > 16.7 mm. I purchased 3 (minimal purchase) replacement sightglasses "watch crystals" 16.7 mm, and I also used 5 minute epoxy (dries clear) from Auto Zone. The epoxy although it dried clear, is just a little cloudy, this leaves a little bit of a cloudy ring around the edge of the glass. Not quite perfect. If I was to recommend it, I would suggest to used a toothpick as opposed to the Q-Tips sticks I used for an even finer application of the epoxy. The result, in my opinion of course, was well worth the little extra trouble. I plan to touch up the paint as soon as I get a few hundred miles on it. If you know someone who needs a sightglass let me know, I've got 2 extra for $4 each, free shipping. I'll send a pic in a reply in a few minutes. Mike On Jul 28, 7:51 pm, Mike21222 <[email protected]> wrote: > I have a recently purchased 1984 CB650SC, it's been running fine for a > few weeks, got the oil changed a few days ago, and new tires. and > since then I have noticed the clutch is starting to act up. It works > fine when the engine is cold, but once the engine gets heated up, it's > tough to disengage the clutch. I have checked the clutch master > cylinder, it needed fluid, I added a little DOT 3, just as the book > prescribes. It ran fine on the way home, once I got home the clutch > again was acting like it did not want to disengage. Anyone know what > might be going on here? Could it be they used the wrong viscosity of > oil? Could overheating cause this? How about the slave cylinder? There > are no leaks anywhere. I think the bike sat for about a year before I > bough it. I also thjink its been quite a while since someone checked > the master cylinder because the screws were seized up and I had to tap > them both out. I replaced them with allen screws from a fastener > store. Any helpful suggestions out there would be appreciated. > Mike -- You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en.
