| Author | Message | ||
     Mikezx9r |
I didnt take any pics, but yesterday and today I installed my Jardine exhaust, K&N air filter, de-noided and installed a tune on my 1125r. I love how the bike sounds now. The surge is gone too. It seems to start up easier too. I think my neighbors are going to hate me when I start my bike my 7:30 in the morning to head to work. After Christmas, I should be adding a more comfortable seat, traction grips, rear fender eliminator, smaller rear turn signals and the quick release pins for the seat. I ended up with my AFV at 115 in front and 120 in the rear. It still has a very little pop during decel. Are these numbers normal? I feel like I will have to increase them a little more since there is still popping. I did notice a little more tach needle vibration between 5-6k rpm now. | ||
| Rah7777777 |
AFV I think should be closer to 100. Your running lean now. Order those traction grips now! Al at American Sport Bike said I was getting one of the last sets earlier this week when I ordered. I think you should add a nice light from www.xblights.com to your list :-) ride safe!! | ||
| Jng1226 |
I'm new here and trying to search through old posts to get educated. I found this one on understanding AFV values with the 1125: http://www.badweatherbikers.com/buell/messages/290 431/400477.html What I learned from it is that numbers over 100 are where your ECM is adding fuel to the stock fuel map based on the feedback from the O2 sensor. Numbers under 100 are fuel being subtracted from the stock fuel map. Therefore, your numbers mean your AFV has been RICHENED. Someone more knowledgeable please confirm. Jeff | ||
| Mikezx9r |
1) If popping on decel can be heard (could be faint) a) This is an indication that the mixture is on the lean side of optimal. b) Increase the front and rear AFV values each 1 point, and road test. c) Repeat until you do not hear any popping on decel. d) Add one more point to both AFV values for your optimal setting. 2) If popping on decel cannot be heard a) This is an indication that the mixture may be too rich, or it may be at the optimal. b) Decrease the front and rear AFV values each 1 point, and road test. c) Repeat until you can hear faint popping on decel. d) Increase the front and rear AFV values each 2 points for your optimal setting. Im pretty sure adding makes it richer. I hope its ok to post that info?} | ||
| Mikezx9r |
Order those traction grips now! Al at American Sport Bike said I was getting one of the last sets earlier this week when I ordered. They are not making them any more or they will just be out of stock? | ||
| Mrbikle |
not making any more, and you were correct with the tune you got, you added fueling... | ||
| Moosestang |
Increasing the AFV until decel popping is gone isn't going to do you any favors at WOT or am I missing something obvious? Lean on decel does't mean lean at WOT or anywhere else for that matter. On my xb9, I had the option to change only the fuel values that were used for decel, which is the way to go to correct decel popping. | ||
| 1_mike |
Moose is correct... Worrying about getting rid of the decel popping isn't paying any attension to the rest of the mapping..! Deceleration popping isn't a big deal. The crusing and acceleration areas of the maps are the important areas to fix. And yea...the higher the AFV, the richer the system. But here also, this is a global enrichment, not a specific area enrichment. If one area is good, one area is not good...you give the system a 6% AFV enrichment...what WAS good...may now...not be so good. There's much more to an electronic fuel injection adjustment that just richen or lean the WHOLE system! Mike | ||
| Mikezx9r |
I was thinking the same thing about just doing a general enrichment or leaning, but thats the only adjustment provided. On another note, the Jardine exhaust is obnoxiously loud. I think Im going to have to try to find an insert for it before my neighbors start to hate me. | ||
| Carbonbigfoot |
which flash? did you get the one for open exhaust / R | ||
| Mikezx9r |
Its the performance flash that they tested with the Jardine exhaust I have and the K&N air filter. | ||
| Rah7777777 |
So are the AFV values not the same way on an 1125 as the older XB's? I could have sworn the higher the value the leaner it was. And the lower the number the richer it was? Am I backwards? Or is the 1125 backwards from XB's? Good thing I'm paying someone to tune it versus doing it myself haha | ||
| Dirty_john |
Gents, for what its worth and as I understand it as a mere mortal and not a Buell factory guru, an AFV lower than 100 indicates that the ECM has learned to reduce the fuel flow for the closed loop mode for the map within the ECM.The AFV is then applied as mutliplying factor to the map for open loop, so the AFVs that the author of the post has posted show an increased fuel flow to compensate for the increased airflow does it not? I would be concerned that at WFO the AFV factor may not be sufficient to add enough fuel, the only way to check this is a dyno. altitude and external air temp corrections are the result of values from the baro sensor and air temp sensor, I understood that these apply correction factors independant of the AFV or am I wrong? I really wish there was a definative document from the factory informing us of how it all works, here in the UK the existance of such a doc would not infringe the Euro 3 regs in anyway, in the states I know you have the EPA to deal with (Message edited by Dirty_john on November 27, 2009) (Message edited by Dirty_john on November 27, 2009) (Message edited by Dirty_john on November 27, 2009) (Message edited by Dirty_john on November 27, 2009) | ||
| Bott |
Rah77777, yup , you have it backwards. Think of it as amount of fuel to a constant amount of air. You are probably thinking in terms of actual air/fuel ratio on the dyno,where lower numbers are richer ratios.In actual afR's 12/1 being rich 15/1 lean Edit: in other words, afV's are OPPOSITE of afR's (that just sounds easier LoL) Bike afV's :110 richer 90 leaner (Message edited by bott on November 27, 2009) | ||
| Rah7777777 |
hmmm....you know that explains a whole lot!!!! Ive been playing with ECM spy a bit (not tuning myself but sending data back and fourth with my tune guy) and thought it was all backwards... oops! you might be right thought, I bet i did get the ratios mixed up with the values... | ||
| Bob_thompson |
Just to confuse a things little more; In one way of thinking, I believe, say at 110 AFV the ECM "at first" saw a LEAN condition and then adjusted fuel richer to compensate giving you a reading of 110. This is the case that would usually be seen with an aftermarket exhaust or intake system flowing more air, initially. Conversely, if it sees a rich condition, at first it then adjusts fuel leaner to compensate giving a reading of, say 95. That is the case here at 4500 ft elevation I'm experiencing. Less air/oxygen available, takes fuel away. Remember though that the ECM is trying to get back to the already somewhat lean EPA approved tune. Am I going wrong? Bob |
