Spaceclam
Cruisin' Guzzisti
every now and again, i found it would hunt, even after the PCV/AT installation. (It did so before as well) wasnt an issue at all, since it didnt happen much, never stalled and it was only a quick hickup, but i got curious.
Turns out, it gets SUPER lean below idle (easily reaching 17:1 by 750rpm, only 250 rpm below my idle speed. So the problem was, the idle was good, but if anything caused a drop, (which happens sometimes, i dont know why) the power decreased so rapidly as it got super lean that it produced an even bigger drop, at which point the ECU takes over and corrects, thus hunting. This area was not mapped in the base map, because let's face it. You shouldnt have to, and there is no good way to do it without wasting up your clutch.
I found i had to add a HUGE amount of fuel to my 0% throttle at 500 & 750rpm, like about of 20%, which are often ignored/set to 0% correction because of how irrelevant they are to riding. Now the idle is perfectly steady at 1000 rpm exactly, and it never budges.
Of course, this is for my 2v, so it's probably a little irrelevant to your bike. But just for giggles, connect the system, get a good hold of your front brake, and slowly let the clutch out to lug the motor down and see what AFR shows up.
Turns out, it gets SUPER lean below idle (easily reaching 17:1 by 750rpm, only 250 rpm below my idle speed. So the problem was, the idle was good, but if anything caused a drop, (which happens sometimes, i dont know why) the power decreased so rapidly as it got super lean that it produced an even bigger drop, at which point the ECU takes over and corrects, thus hunting. This area was not mapped in the base map, because let's face it. You shouldnt have to, and there is no good way to do it without wasting up your clutch.
I found i had to add a HUGE amount of fuel to my 0% throttle at 500 & 750rpm, like about of 20%, which are often ignored/set to 0% correction because of how irrelevant they are to riding. Now the idle is perfectly steady at 1000 rpm exactly, and it never budges.
Of course, this is for my 2v, so it's probably a little irrelevant to your bike. But just for giggles, connect the system, get a good hold of your front brake, and slowly let the clutch out to lug the motor down and see what AFR shows up.