Just wondering if there was a tool that you could actually read the ratio with... I know that they are on dynos and stuff, but can you get one seperately at all? Just wondering, looking forward to getting my sparks exhaust on and tuning it, should be here in about 1-2 weeks.

 

Take it to a dyno and pay to have it run on there.

You need a load on the bike to tune it.

Short of that, go buy an EGT and have a bung welded to your header (I think about 6" from the head). Jet until you see about 1250 as a limit on the high end for the long WOT runs.

 

I actually tune with an Air/Fuel Ratio meter. It is a small device that gives an LED Readout relative to how rich/lean you are. It is small enough that it is velcro'ed onto the top of my front brake resivoir. I know that K&N makes one and sells it through Chaparral (chaparralmotorsports.com). I wasn't too impressed with the overall appearance or the faceplate so I opted to go with another manufacturer.

I ended up buying a unit manufactured by "Split Second". I bought it from http://www.racerpartswholesale.com/index.html

Here is a webpage that gives you an idea of it's physical size.
http://www.fargonasphere.com/serpent/

And here is a webpage about wiring... quite simple.
http://www.splitsec.com/products/arm1/arm1ds.htm

Like mentioned before, one must tune under a load. I have mine setup so my bike is rideable and I glance at the readout while riding up hills and the like.

Hope this helps.

Ride On.

 

Just a quick note about the K&N version.. If you look it up in the catalogs, you will see a photo of the oxygen sensor. It is a single wire unit. After talking to many different sources, I found that the single units are not as sensitive as the 2 or 4wire models. Given the price they want for the sensor, you can purchase a 4wire unit from the place I mentioned above.

Ride On.