Quote:

ok Ken what is your goal? went throughout this thread again..somewhere on the begining of it you mentioned your goal is 12,5 and around this

what is your result now? let's say....;
1/4
1/2
WOT

...



It varies depending upon weather & type of fuel used.

All other things equal, on a relative basis the AFR automatically leans out in colder weather, & E10 fuel runs leaner than pure gas does.

Pure gas alone runs about a full-point richer than E10 does in my bike.

With a 50/50 mix of 87 pure gas & 91 E10, the bike is generally about 13 at idle and about 13 - 13.2 WOT in the upper RPM band approaching redline. Normal motorway cruise (60 - 70 MPH) is generally in the 13.6 - 14.2 range, depending upon weather conditions & grade.

I practically never hold 1/2 throttle on a flat road, & when I do use half-throttle, it is generally under some form of acceleration or extra load, so the the AFR varies. I'm not sure what more I can tell you off-hand about what my bike does AFR-wise at half-throttle without specifically observing the situations involved.

A combination of work/family/personal/weather issues have kept me off the bike recently. Next time I take it out I'll note the weather conditions & AFR's & report back.

The above said, from my perspective decent numbers to strive for are:

WOT: 12.8 - 13.5

Light throttle flat-grade motorway cruise: 13.5 - 14.5

Moderate acceleration: 13 - 14

Idle: 12.5 - 13.5

In the real world if your AFR's are in the 12 - 14 range then that is, as a general rule, a good & safe place to be.

Some will tell you AFR's should be "13 across", however while that may be achieved on a dyno sweep-test (with a shorter load time than the real world road) it generally does not happen in real life on a real road in real world operation.

The above are just my opinions, so take that for what it's worth.