Had my 2006 Road King dyno tuned by what I consider to be a good dealer/tuner here in Indianapolis and I was expecting some mileage drop but from 42MPG down to 32 seems a bit much to me.

It smells like it is running rich and I pulled the rear plug and it looks pretty blackindicating to me that it is running rich.

I have an appointment to have it looked at on Tuesday.

I have the SERT, V&H Dresser Duals, V&H Ovals and a K&N 3909 air filter.

It seems to run fine but I am thinking a 10MPG drop is a little much.

Thoughts?

 

I have a similar setup but with the SE A/C and a map from Latus HD. Itaverages 40 mpg. A good tuner will balance performance and fuel economy. The tuner should be able to make adjustment to the map to increase mileage.

 

I asked this before, but in a different place. I believe that tuning can be done for max mpg, max power, or cool running. You can't have all three at once. Lean running makes for MPG and power but creats excess heat. More fuel cools it down but there goes the MPG.

 

You can have it all. There are over 200 cells in the air-fuel ratio table where you can set your desired air-fuel ratio based on rpm vs manifold pressure (load). You can run lean for gasmileage inyour cruise range and richer in the areas where you might be accelerating or going up a hill. You can run 12:1 pig rich at 2000 rpm and 14.6:1 super lean at 2250 rpm under the same load if you want to.
If IndyRiders gas mileage dropped 10 mpg, I suspect his tuner made him rich in places he shouldn't have. Someone should require a federal license to tune bikes, too many rip off clowns taking your money and giving you lousy results. If you just want good ride-ability and decent gas mileage, you can do it yourself.

 

Check out the "5 Questions To Ask Your Tuner" at the top of this section. Helped me maybe it'll help you.