I installed your product on my 2002 Yamaha V Max this past weekend and I'm very pleased with it's features and performance.  If you're not familiar with the V Max, the tachometer is located down by what is typically the fuel tank, requiring you to look down to see it.  If you wear a full-face helmet, you REALLY have to look down.   All V Max owners are looking for a tachometer solution and/or a shift light.  I like that I have everything in one with your product.

One major installation challenge is the speed sensor.  The V Max is a shaft-driven bike so there's not chain sprocket to install the sensor on.  As far as the brake rotor mounting method, there is not enough clearance between the rotor and the caliper arm for the magnet to pass under.  Therefore, I had to improvise.  I ended up drilling two small holes in the plastic collar for the outer rear drive unit (see pictures) and gluing the magnet to the plastic collar for the inner drive unit.  The magnet passes perfectly under the sensor and seems to adhere to the plastic surface with the adhesive supplied.

The rest of the installation was easy.  The V Max has a "Boost" servo which samples the coil pulse for RPMs.   I attached the white RPM wire to the yellow wire for the V Boost circuit located behind the left air intake.  This required  the RPM multiplier in the configuration to be set to 2. 

Finally, I opted to connect the red wire (+V) to a 12 volt source that was hot only when the ignition key was on.  I didn't want the display on all the time.