SLUGGISH TACH ON 86 INTERSTATE

[black1200]

I have an 86 interstate with tach problems that started about 2 years ago. When cold out, early spring I noticed that the tach would not wind up right away corresponding to the RPM of the bike. Now it is really sluggish. I believe it is being caused by a sticky needle in the gauge itself. Does anyone have experience with this and how do you go about getting to the gauge itself. I have seen some reports of lubing the needle itself, I also have read that it could be loose or corroded electrical connections from the right coil, where the impulse to the tach is originated from. Thank you.

[virgilmobile]

My spedo was like that.After very careful disassemble,I was able to put a few drops of oil on the bushings.Fixed it.Be gentle around the needle.