Auto Meter Tach Shows half the actual RPMs

[BATZ]

Why would my Auto Meter show only half the actual RPMs?  I have both the wire loops cut and the tach input connected to the wire harness block on the inside firewall......any help?

[Sagermotorsports]

What ign. are you running?

Brett

[knuclebuster]

Batz,
  I also have an Autometer Tach that only reads half the RPM's.  I have the loops cut as well and wired correctly.  I contacted Autometer tech department.  They told me that I had to have the tach recalibrated to work with the pulse rate of the Yamaha ignition system.  Basically, we have purchased automotive callibrated tach's and connected them to a motorcylce engine.  They did tell me that it was no big deal to recalibrate, just would be tied up for a month or so.  I decided to wait until the season is over and then send it in.  You can contact them through their website if you need to.

KB

[BATZ]

I'm running the red ignition system.....   there must be another way to connect the tach....I'm thinkin the tach is only reading one coil.

[knuclebuster]

Im running the red ignition myself.  If you find another way to hook it up that works, be sure to post how you did it.

KB

[Sagermotorsports]

I just hooked mine up to the tach wire from the box and it worked fine. I will take a look and see if I can find something out

Brett

[BATZ]

I FIXED IT!  I cut all the wires and took it out!  So easy! WHO WOULD HAVE GUESSED!  LMAO!

[Racinjj]

I contacted Autometer and was told that they cant recalibrate an automotive tach.  You have to get a motorcycle tach for it to work correctly.  Looks like I will be getting a tach from my local Legends dealer.

[VMS Motorsports]

There is no such thing as a local Legends dealer in Wisconsin Jeff, you'll have to go to another state

[Racinjj]

By local I meant Iowa.