Vapor Gauge Install

August 23, 2018 modifications


With the removal of the OEM gauges, front fairings and dash simplification…  I wanted a minimal display for speed, RPM’s, miles, engine temp and clock. Initially I looked at analog gauges as I really liked that look but had difficulty finding ones that I knew would be compatible with my speedo drive ratio and signal for RPM’s. Searching further I found many “all in one” slick units that used GPS for speed and looked amazing… but the price was reflective of their perfection and just wasn’t in my budget.

I finally came across a series digital gauges by Trail Tech. Designed primarily for the offroad market, it checked a lot of the boxes I was looking to fill.

  • Price (well under $200)
  • Speed (as well as max tracking)
  • RPM’s
  • Trip odometer
  • Total Odometer
  • LED RPM warning and red line indicators (user programmable)
  • LED temp warning and overheat indicators (user programmable)
  • Clock
  • 12v source power
  • Option for constant backlighting
  • Compact
  • Waterproof


Trail Tech “Vapor” gauge…


Once the ignition key switch was removed… I needed to fabricate a mount for the gauge to sit on top of the upper crown.


Bracket and key hole plug…


Bracket mounted to gauge…


Top crown indexed…


Gauge mounted to the bike…


Once mounted I had to make the connections. Speedo wire ran down the fork leg and replaced one of the rotor bolts with the included magnet topped bolt that came with the gauge. Pretty slick.


Magnetic bolt head


The unit I purchased had a temp sensor as a copper ring designed to be mounted under a spark plug. This configuration wont work with the way the plugs and boots are installed, so I got a hold of a Trail Tech 25mm inline temp sensor that would be spliced into the radiator hose. Install was easy, right behind the radiator neck and thermostat.


25mm inline temp sensor…


Next obstacle to overcome was the signal required for the tach to operate. I spliced the wire from the head unit into the left coil plug.


Tach signal connection…


From there I just plugged everything in. I also made sure the unit had switched 12v power. This would allow it to be constantly backlit which is makes for excellent visibility in low light or night riding conditions. The included manual is very well done. Even comes with a template for the bolt mount spacing. I measured the front wheel diameter using the roll out technique. I then set the shift RPM (orange LED) and the redline RPM (red light). Setting the temp was just as easy, with warm (orange LED) and then hot (red LED).

These minimal LED’s on the Trail Tech unit are very slick and when combined with my newly mounted LED’s on the tree I had the following indicators.

  • Turn signal
  • High Beam
  • Oil
  • Nuetral
  • Low Fuel

Overall I am happy the way the dash turned out. Much smaller and less bulky that before and easier to read.


Note 8/22/18: The RPM readout does fluctuate. I am not sure if it is a setting on the head unti or my point of connection being in the wrong place or faulty. I will update once I find a solution.

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