I have no idea what a "tuning compensation" is. Far as know it's a Harley stage 1. Just has Screaming Eagle slip-ons and what looks like a Screaming Eagle air breather although there are no markings say that.

Checked it just now and it has a little dust that blew out and a little oil on the bottom portion. It looks good to me but I'm comparing to the filthy air breathers I see on my tractor when I blow them out. You don't want to be near me when I do that. This was just a puff of dust then nothing. So I think it's okay. Was worth a check. One of the darn screws wouldn't let go so I had to do some grinding and then come up with a replacement, but it's done now.

 

I would change the air filter. It may still look good but chances are the element is partially plugged. Air, oil filters and oil are the life of any engine.

 

usually a stage 1 incorporates a tuning device, a download or other method to match fuel delivery to the increased air into the motor and the increased flow out of the motor.


....and as the rest of the story comes out below...that'd be your xieds.

they can be checked with an ohm-meter- although resistor packs don;t have anything to go wrong in them...they either work or don;t.
additional resistance could build up in the connections, so you could unplug and re-plug those

a tech coul dalso test you ro2 sensors with a voltmeter



Mike

 

Check that your o2 sensors are still working. When they go bad so will fuel mileage. Any one with a tuning device that can datalog can check.

 

Nah don't do that. Put it directly in your cylinders by taking the spark plugs out and then see the nice white smoke come out of your exhaust. If you did a stage 1 there's probably carbon buildup on your cylinders since the crankcase breather routes directly to the air filter.

I wouldn't be too worrried I get an avg of 35mpg on mine. I only get mid 40s when I do longer rides

 

Wish you hadn't said that. I've had XIED's on them since I purchased it. So how would I check to see if they are working? See if there are any codes that's been logged? Is that what you mean by "datalog"? Or are you saying I need some other device than what might be logged.

 

Remove the xieds. If mileage comes back then you know its your xieds.

 

Did your gas station go to a higher ethanol percentage?

 

Check tire pressures and switch from summer to winter fuel may be factor.

 

I actually do this a couple times a season...