Tachometer Issue

[jblvalk]

So my tach sticks at around 3000.  Won't go any higher, and it works relatively fine at idle to 3k.  It appears to "Stick" at some points and then ratchet up to the appropriate RPM.

How naive of me to think I could just wrench the thing off the bike and shoot some WD40 into it to "un-stick" the needle.

Has anyone had this issue?

[Chrisj CMA]

I'm assuming you have a standard or a tourer as opposed to an interstate, but including that type of info really helps to get a more accurate answer to your question.  This also might get more traction on the tech board instead of here .

If it's a standard/tourer you cannot easily access much without prying or cutting things apart.  I'd look for a replacement unit from eBay or pinwall

[Bone]

This also might get more traction on the tech board instead of here .

Where am I, help ?

[Bighead]

You are on the tech board as it was originally posted in the general forum but moved here by Admin

[jblvalk]

I'm assuming you have a standard or a tourer as opposed to an interstate, but including that type of info really helps to get a more accurate answer to your question.  This also might get more traction on the tech board instead of here .

If it's a standard/tourer you cannot easily access much without prying or cutting things apart.  I'd look for a replacement unit from eBay or pinwall

Sorry about that so yes I have a tourer and I pulled the tach off and there's really no way to get at the needle.  Hate to replace the entire thing with another used unit at $150, which is the lowest I could find.  I'll keep looking.

[WintrSol]

You may want to first, check the signal on the yellow/green wire from the ICM; you need some way to measure the peak voltage of the signal while the engine is running, which should be greater than 10.5V, relative to the green (ground) wire. You may also want to verify the +V is steady on the black/brown wire.

[jblvalk]

You may want to first, check the signal on the yellow/green wire from the ICM; you need some way to measure the peak voltage of the signal while the engine is running, which should be greater than 10.5V, relative to the green (ground) wire. You may also want to verify the +V is steady on the black/brown wire.

Thanks for the tip.  I loosened and then tightened the connections inside the tach, reassembled, and now the tach does go beyond 3k.  Go figure.  Gonna keep an eye on it for now.

[WintrSol]

Connectors are always my first suspect - a little DeOxit on the contacts will go a long way in an old bike.