Cleaning behind the tach glass

On my tach on my XJ700 it seems as though it is dirty or has some type of fog residue on it. Is there a way for me to be able to clean behind this glass without breaking the tach?

 

Remove and disassemble the tach housing, spritz of Windex, wipe of a paper towel, reassemble, reinstall. Simple, but one wonders how you got this condition in the first place. Bad bezel seal? You may want to examine the entire face and housing to make sure you don't have cracks or broken gaskets. Good luck to you!

 

Mine was the same way when I bought my seca. It's clean now, I took some time one afternoon and cleaned it up. You can see the before picture in my gallery. One of these days I'll get an after picture posted.

Carefully disassemble the tach housing and clean the glass and seals. Take your time taking the housing apart, it seems like there are about 50 screws holding it together, (I know.. there aren't really that many screws, but it seems like it). Don't force any part to get it open, once all of the screws are out it will almost fall apart on it's own. I've seen people looking for bezels for these bikes because they broke it trying to get it apart. Just take your time and you'll be alright. Heck, I even left mine mounted on the bike when I cleaned mine.

Once you are ready to put it back together I would sugest that you put a thin layer of silicone caulk on the rubber seal to ensure a water tight seal.

 

Silicone grease (dielectric or tuneup grease from Permatex) would be an appropriate alternative should your gasket be in top shape. It would help lubricate and "moisturize" (really just a whimpy word for condition) the rubber. I would advise against the caulk unless the gasket is degraded in some way, it is unnecessary. Of course in a perfect world, we could just wave our magic wand and a new seal would be in our outstretched hand. Hey, a fellow can dream, can't he? The seal should be cleaned with soap and water once it is removed and you can use WD40 as a conditioner as well. Can't think of anything else to mention. Oh yeah, you could cut a new one out of thin rubber sheet if you need a new one or use a rubber bead (like they use to make custom o-rings) to lay in a fresh seal (a little work but effective). Silicone bead is available and is in my opinion superior for longevity. My two cents, hope it provides something of use to you.

 

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I have sprayed windex into the bulb hole, sloshed it about and drained it via the drain hole it has. Opening the thng is a PITA.
Cool.
Srinath.