Dfo's

I have a '01 ultraglide w/stage 1 and aftermarket muffs w/ a revtech dfo. At present it has kerkers w/o baffles and sounds bad. Gonna put on rinehart slipons. Any idea as to how you set the dfo? I noticed it has 4 screw adjustments but don't know where to go from there. McGregor

You may have found your info by now, if not, here's some regarding DFO's. First, a DFO is not a true tuning module. They basically turn your EFI bike, into a bike with a electronic carburetor. They are linear just like a carburetor, which means, each circuit bleeds into the next. They usually have 4 pots with a green, red, and yellow light.

First pot, (green light), is your air fuel mixture scew.

Second pot, (yellow light), is your acceleration fuel adjustment screw, (accelerator pump).

Third pot, (red light), is your main jet fuel adjustment.

Fourth pot, no light is the transition screw. This one sets the rpm at which the main jet or third pot, (red light), turns on.

Notice the terminology used, (air fuel mixture screw), (accelerator pump), ( main fuel jet), sound just like a carburetor. This is the exact terminology used in the instuction manual that comes with a DFO. Remember, no matter what tuning device you install, without access to a dyno, you cannot properly tune the engine for optimum performance.

Hope this info helps.