1. 4 Stroke Husqvarna Motorcycles Made In Italy - About 1989 to 2014
    TE = 4st Enduro & TC = 4st Cross

Best Air-to-Fuel Ratio?

Discussion in '4 Stroke' started by Merk67, Apr 5, 2010.

  1. Merk67 Husqvarna
    A Class

    Location:
    Wisconsin
    I recently installed a Power Commander V with AutoTune on my 2008 510 SMR... The Autotune came pre-programmed with 13.2 as the targe A/F. I know that every bike is different and the only way to tell for sure is to have a map written on a dyno... Has anyone actually done this?? And if so, what is the optimum A/F ratio (for maximum power) for your bike? And does is vary at all - throttle position, rpm....?

    Thanks!
  2. hipsterdufus Husqvarna
    A Class

    Location:
    KS
    mine ran terrible when i messed with the afr, made it 13.7 once and it just popped and banged all over the place. i reset everything to the map they provide on the website. 13.2 then let the a/t correct at +/-15%, then +/- 10% after 2 rides.

    note: i did this before the firmware/software update in feb 2010.
  3. danbartol Husqvarna
    AA Class

    Location:
    Colorado
    When I talked to the guys at Power Commander they recommend:

    14.2-14.5 for Max MPG

    13.2 for Max HP.