Jumping tach

[Skyboy8950]

Hey guys,

I put a new (to me) tach on my bike after my accident and now the tach likes to jump around. It will hold correctly, then bounce around a bit, then settle, bounce, settle, bounce. You get the idea. You think it is the tach or the cable?

[BassCliff]

Hi,

Mine does this once in a while. I take the cable off and squirt WD40 into the gauge. It settles down for a while. You might as well lube the cable while you have it disconnected.


Thank you for your indulgence,

BassCliff

[MrZig]

My gauge seems to do this after it warms up. It wobbles from 0-5000 RPMs but as soon as you get near the redline it wobbles all over the place, and sometimes sticks. Because of this I don't rev it up as much, as not knowing what exact RPM you're at is kind of bad, heh.

Thing is, I have a brand new tach gear and cable. It's either my camshaft gear (which is ground up and has some chunks missing) or the tach itself. Not sure, but it'd be worth a shot to clean it out and regrease it. The gauge, that is.

[ktp1598]

I had one do that and it turned out to be a pinched cable. Check that 1st. If it isn't pinched, pull the cable off of the bike and turn it by hand.

[Wallowgreen]

Both my tach and speedo did this, made an awful row to boot. I tried the WD40 approach like BassCliff but I found it didn't last very long so I resorted to 3 in 1 in the back of the gauge and so far haven't had any more problems.