what is the ideal AFR for a street bike?

[billyd1]

Thanks all for your time!
Is the only thing that changes from a cold motor to a warmed up motor the AFR? Hobbit do you use your oxygen sensors at those AFR settings?

 

[BoomerBob]

I heard back from Doc and he explained it's like spark plugs running rich. They get carbon fouled. I don't know why it would make a difference with the Tmax sensors.

 

[patrickcarr]

your stock setting from hd is aprox. 15.2 to 1 - 15.5 to 1 on an stock bike
and even with the stage 1 down load it still really nevey gets much better than about 14.2 to 1. With a good tuner and a good mechanic you can get all your VE numbers maped correctly and you can have everything, good af numbers should be about 13.5 to 1 to 13.8 to 1 through all ranges, off idle cruise and wide open. you gas milage might decrease some but in some cases it will actually be better and run cooler as well longevity of the motor