| Author | Message | ||
     Camronnie |
I've tried to search this, but had no luck. I'm fighting two battles with the XB right now: 1 - If the idle is just below 1000 RPM I have terrible throttle response but the revs drop to idle well. 2 - If the idle is right at 1000RPM the throttle response is there, but the bike doesn't return to idle. I normally have to clutch it down. I have ECMspy, would it make sense if I lowered the fuel map for RPMs above idle at 0% throttle, to return the bike to idle better? Or am I approaching this the wrong way? | ||
| Froggy |
Indeed you are, you shouldn't change anything, you are just opening a can of worms rather than fixing the issue. What you do need to do is a TPS reset. Warm the bike up, follow the TPS reset procedure, then set idle to 1050RPM. While you are in there, reset the AFV. Go for a ride, see how it feels. If the idle still hangs, lower it a tick (really doesn't need much), repeat. You should have excellent throttle response with no hanging idle. | ||
| Brother_in_buells |
Have you checked for leaking manifold gaskets? | ||
| Readyxb |
With ECMSpy, you can also check in the cases where the RPMs "hang" and don't return to idle, that the TPS degrees is within expected values (5.2 - 5.6°). | ||
| Camronnie |
froggy - have I have recently done a TPS reset twice, but it does not change what I am seeing. I have not reset the AFV, are there certain steps to that, or is it just like the TPS reset and there is a reset button? brother in buells - I will have time this weekend to check on that. Thanks all for the responses! I should also add, my first three bikes have been 4 cylinder kawasakis, and this is my first twin. Maybe I'm just used to how quickly the kaws returned to idle? readyxb - are you saying hook up ECMspy after the bike has warmed up, blip the throttle, and make sure that when the throttle is at physical idle that electronically it is also at idle? I can also check that this weekend. I should also add my first three bikes have been 4 cylinder kawasakis and this is my first twin. Maybe I'm just used to how quick they respond at and return to idle? Or do twins act the same as well? | ||
| Dwilson357 |
The twin should Idle good and be just as crisp. Follow Froggy's advice I had the same problem when I first got my bike. Make sure your doing the reset to the book and make sure the bike is warm. That can give everyone a baseline to work with. | ||
| Camronnie |
update: I let the bike warm up, no leaks. turned off the bike then backed out the idle adjustment. Reset TPS and AFV (was 104%). Bumping the idle up to about 5.5* to start the bike, it was running low. it didn't take long to bump up to 1050RPM, which made me question what would happen if I kept turning it up... not sure exactly how the idle adjustment dictates the idle but after I kept turning it CW the RPM initially dropped back down then came back up and was much steadier. RPM is now bouncing around 1050 very well, has throttle response, and after I blip the throttle at idle the revs drop to about 900, much quicker than before, then slowly steps back up to the 1050. Also, changing the AFV from 104% to 100% doesn't sound like a lot to me, but the motor felt much smoother. thanks for all the input! |
