This week I am installing my HMF and K&N along with Jet kit. Rather than do the spark plug test I was wanting to use my buddies Wideband O2 sensor to adjust the air to fuel ratio. I figure it would be much easier to adjust quickly in the future and take out alot of the guess work. Only problem is I cannot find the Service manual what the optimal Air to Fuel Ratio? Does anybody know what it is, maybe someone who works at a shop?