AF ratio, how do you know?
I read a reply about a resistor in the O2 circuit. About what numbers on the EJK or power commander, etc.
But without a wideband O2 sensor, stoichiometer, and dyno, How do you know what your AF ratio is?
And if you can’t tell for sure, doesn’t it make sense just to run an exhaust that keeps the OEM O2 sensor?
ETA, if the KLX300R makes do without an O2 sensor, maybe between the MAP and the TPS the ECU knows what to do?