This is an air/fuel mixture monitor that you mount right on your machine. Check this out!

 

NovaKawi, I was just thinking about this after seeing all the hell people are going through with their jetting just to see if it would make it any easier to tune. I've done extensive tuning work on my 4cyl. turbo cars with air/fuel meters in the past. I've worked on DSM Talon turbo's and Eclipse turbo's as well as a bunch of the 2.2 Dodge turbo cars.

My experience has been that you can only tune for WOT using those gauges and typically it is a waste unless you are using forced induction. I've used the AutoMeter A/F guage in all my turbo cars, the gauge only cost's about $30. During most of your normal cruising, the reading from the 02 sensor will fluctuate dramatically, usually between .35 and .75 volts (the total range is .1-.9 volts, .1 being dangerously lean, 1.0 being unnecessarily rich). In a forced induction car, you usually try to shoot for somewhere between .88 and .92 volts for the biggest performance hit while still being safe from piston meltdown. My wife used to refer to it as the "video game" on the dash when we would cruise around at night because it would go from green to yellow and bounce back and forth.

I personally don't think it would help at all with tuning anywhere in the power band other than Wide Open throttle. Also, with the way the V twin is designed, you would need 2 separate O2 sensors (one in each exhast pipe and at the exact same distance from the head as the other) and 2 A/F guages to cover both cylinders.

Let me know if you decide to pursue this, I can help with A/F gauge tuning info...

 

The manufacturer is claiming that the unit will work for all throttle settings, and it makes sense that it would. If I had one, I'd put the sensor in the rear cylinder pipe and use the one jet size down rule to do the front cylinder.

 

It doesn't look like a WBO2 (NTK or Bosch type), and I don't know of any WBO2 sensors that you can buy for $34.95.....so it's more than likely a Narrow band, which is useless for tuning AFR.

I too have used WBO2 sensors on both of my cars for many years; they work equally well on forced induction and normally aspirated applications....and they are not limited to WOT.

FYI, the previously mentioned Autometer setup setup is not a WBO2, it's a narrow band....it's a nice bling device, though.[img]i/expressions/face-icon-small-wink.gif[/img]

You would need only one WBO2 setup, at the exit of the exhaust before the muffler.