Thanks for the replies!
calj737, I saw your build and it's magnificent! I see that you went along with the +$500 tach/speedo, which is no wonder why it works excellent, but my wallet isn't deep enough unfortunately.
Vapor is one of the best looking+function for the price range I'm looking at.
Thank you American Locomotive, yes I am fully aware of trailtech products working beautifully on
single cylinder bikes.
But for the 4 cylinder sohc's, somehow the rpm seems to jump around quite a bit.
Apparently, multi cylinders produce "dirty pulses" or "wasted sparks", and maybe the Vapor isn't too good at handling them.
Here's some of the findings
http://forums.sohc4.net/index.php/topic,17620.25.htmlIn this 11y/o video, the tach manages to work decently, with "resisted tach wires". I have no idea what or how resisted wires are different from regular ones. Thinner diameter wires for more resistance?