• How many of you have installed a full performance exhaust system on your bikes...

    How many of you have installed a full performance exhaust system on your bikes & gotten worse gas mileage afterwards? Mine is an 09 & I also have a BMC filter but no other mods done yet.

    34 comments
    • Common sense would think that the milage would be better which it always was on all the other bikes I've owned & done this to. It just was a surprise to me when I noticed it got worse cause it doesn't make sense from my past experiences.

    • I have a '06 with BMC filter, full ti Muzzy, flies removed and PC3 and I can tell you that my MPG sucks. I couldn't tell you exactly what it is because my gearing has changed and my speedo is way off. I can tell you that I might get 100 miles to a tank.

    • I have two brothers full 4-1 exs gust flys removed, pc3 and tune and get around 36mpg cruising

    • Have you started using a different octane fuel as well?

    • Bro it's a bike. Fuck the gas mileage. You pay to play

    • Lmao! I was about to say the same thing, but figured I would be nice today

    • Some of these post be killing me

    • Man I hear ya. Gas mileage is the LAST thing I'm worried about with my bikes

    • Not only that the price of fuel is lower than previous years

    • For real!

    • No still running 91 or higher

    • I wasn't really worried about the milage, I just was surprised that it didn't increase with the minor things I did cause it increased on every other bike I've owned

    • Yeah but different brands are tuned differently from the factory.

    • Mine is the Two Brothers 4 to one system as well but I don't have any fuel management system on it yet

    • It helps

    • Yeah true, I just found it a bit odd that the milage went down. It does shoot some cool flames out the pipe cause of the unburned fuel lol!

    • That's what I figured

    • yep my gas mileage sucked after adding my exhaust.

    • Full brocks alien head. Bmc filter. Pc5 and flashed ecu. Gas milage sucks ass but it flies

    • Only mods I care about are those that increase power or comfort. F*** the mileage!

    • Full muzzy flys out pc5 1 tooth up in the front I get average 38.5 mpg

    • 1 tooth up ?

    • Brocks ct brocks fly out street map pc5

    • Up down witch ever gives more power feel

    • Have you ever checked to see if that's accurate by calculating the miles verses gallons used? Mine used to be accurate before the mods

    • Mine is ok I think I have Bmc filter and the dual Brock's CT and PC5 but you put mods on your bike to make it faster or Tip top.

    • Yeah, I did it to get more power & sound better, but was surprised that it didn't get better mileage doing just those 2 things. Oh well, it's still a sweet bike!

    • Hell yea the best bike in the market! I think! You need to get your ECU Flashed tho don't buy a PC3 or PC5 you won't need them after the flash

    • It will run better after that should get better gas to!

    • Yeah I've been contemplating doing that

    • no

    • I wonder if you really are averaging 41 mpg then?

    • I think so going off when i ride with the wife on her stock gsx650f n the fuel she uses

    • That's good then!