So I installed the Yamaha tachometer a while back and finally had a chance to hopefully solve this issue tonight....not so much.
It's reading about half of what the true engine RPM's are. I hooked up the powercommander to my laptop to confirm this. I originally had it wrapped around the coil 5-6 times.
I changed it to wrapping around the spark plug wire 5-6 times this evening. But it's still giving half the RPM reading.
There isnt a ground cable with this unit either.
Any thoughts[IMG class=inlineimg]https://www.raptorforum.com/forums/images/smilies/huh.gif[/IMG]