The two screws on my tach face backed out and they would bounce around like
Mexican jumping beans at the bottom of the tach whenever I
rode. Here's what I did:
- The very important first step was to decide whether or not a vibrating tach
face and a crazed tach needle was mildly bad, bad, or really bad.
I couldn't come to a conclusion about this after considering/ignoring it for a year, so I decided to suck it up and fix
it.
- I removed the two nuts from the back of the tach. The headlight removal
wasn't required, but I
felt like complicating things a little.
- I wanted to disconnect the wiring so I could cut open the tach away from
the bike, but I saw no
way to remove the yellow/black wires which disappeared through a rubber base. I tried
to pull the rubber plug out with pliers but had no luck. I ended up leaving the tach attached to the bike.
[Reader Joe informs me: "The yellow/black wires and rubber grommets are the illumination lamps. They
should pull out with a little finesse."]
- I started cutting on the tach and realized the disc wasn't penetrating the tach. My cutting
disc was too small and the fat Dremel would not let me get the disc any closer.
An option was to cut
at an angle, but I decided to put on the flex-shaft attachment. (DIY note: Cut
within 10 mm of the black rim so you stay in front of the tach face.)
- You can see the boogered plastic around the edges from cutting. They
broke off easily by
hand. I used compressed air to clean out the inside because the face had been rubbing against the
oil light and a fine black powder was all over.
- I put the screws back onto the face and fired the bike up to make sure I didn't break
anything when I was trying to pull the wires out. It's working correctly so I
used JB Weld to seal the tach back
up. A little tape on opposite sides helds the two pieces in place so they didn't slide apart
while drying.
- A strip of aluminum tape encircles the cut. The rubber gasket is returned to its original
position behind the black rim.
- This is an extra shot just in case anyone needs a more detailed view of the tach's back.
- All that work to get those two tiny screws back in place. And if you wait long enough
like I did, you too can have a nice worn-out spot at the base of your tach.
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