An A/F gauge measures Air/Fuel ratio in your exhaust. It tells you if you are running lean or rich and can be used along with an EGT (exhaust Gas Temp) to set up your bike or car for optimal performance. Of course the one thing you can't mount on your bike is the one tool you MUST have to make the EGT and to a lesser degree, the A/F readings relevant is a dyno.
I'm a big proponent of the school of thought that you can't really have too many gauges on an engine.
As for the RX2N speedometer/Tachometer, it a really neat little all in one dash for motorcycles. It is alittle on the new "Bling Bling" side; lots of lights and flash. Some people think it detracts from the classic style of the bike. Have to make up your own mind about that.
I don't know how to embed a video or I'd embed this one of the RX2N speedo for you.
here is the link to the speedo website.
An A/F gauge in action.
And finally a link to the website selling them.
Knock yourself out.unk:
I think these look awesome but at the same time I also think they are a bit too "new" and flashy for a vmax. I think more along the lines of a classic muscle car gauges.
I was honestly looking at the monster gauges from cycleoneoff.com but really have no need for it considering my bike is pretty much all stock.
Sorry, back on topic now.