With the power commander you can adjust the air fuel mixture as if you had variable jet sizes on a carburetor bike.
When a bike is modified with aftermarket exhaust or air intake filter setups, you need to increase the amount of fuel to match the increased air flow.
Most people also crank it up a bit more, because the bike is a bit more responsive and smooth with the mixture set higher than the factory emissions-level driven settings.
That alone reduces your mpgs. But when you modified the bike to get more HP, you are going to be inclined to use that extra HP, and that will burn up more fuel.
If you like the way the bike is running, and your plugs look normal (a bit on the black side = a little bit rich) then dont turn the power commader settings down. Running too lean will burn holes thru your pistons and burn your valves - you have to err on the rich side or risk destroying your engine.
The one thing to check is your air filter- if its not white like paper its restricting your airlflow and making the engine run even more rich than necessary.
Another thing that pulls your mpgs down is a windshield/ fairing/ lowers and saddle bags. Anything in the airstream other that your smiling face increase the wind drag and requires more fuel to go the same distance at the same speed. If you want to get better mileage riding locally, take all that stuff off the bike: ride naked.
So.... if you are comparing your modified 950 tourer to a stock 950, or a naked 950, you cant possible get the same mpgs as a stock factory naked bike.
Last edited by KCW; 11-28-2018 at 02:54 PM.