LocoLechero
New Member
after all my mods im only getting 28 mpg 
i think something might be wrong? any thoughts ??
i think something might be wrong? any thoughts ??
Why is the fuel mileage not better???
- Thread starter Kspalla
- Start date
thats really low, even if you drive it pretty hard, but once you get into the juice box thingys anything could happen and i have no experience. I think Scott or Marthy are the juice box pros.after all my mods im only getting 28 mpg
LocoLechero
New Member
I tripped my trip counter on the last tank but im pretty sure it was 100 miles and i pumped 3.5 gallons- im using premium fuel if that matters- would installing the exhaust incorrectly affect my MPG i mean not having seated the headers correctly? if not then im really confused everything seems right other than some gas stink when i accelerate hard - im using marthy's sport rev b for 2bros and i dialed my mid-range down on the box 10% i was think of dialing the low range down 10% but i don't wanna run lean in any gears ya know - im not leaking any fuel either- not sure what else to do but bring it to my dealer and ask them to do a once over which im sure they will charge me out the *** just to look
i'll have to see what this next tank puts out , been raining alot these last few days here
i'll have to see what this next tank puts out , been raining alot these last few days here
Bert-Aus
Well-Known Member
I have had the best mileage ever lately!
but then it is only because I haven't ridden in 10 weeks
but then it is only because I haven't ridden in 10 weeks
My last fill up was about 38mpg which was my lowest ever. Not sure why although it was mostly fun miles (not commuting). Today I got 48mpg on my fill up and that puts my average since getting my bike in 2012 to 47 mpg. Since the bike is rated at 43mpg according to Yamaha I'll take 47 all day everyday. This last fill up was 3-40 mile commutes mostly highway (70mph average, at about 7-8k). I have an aftermarket pipe and power commander with Marthy Adv gear rev b map.
LocoLechero
New Member
last tank got 41 mph which im thrilled about - switched back to the pre-loaded 2bros map and dialed down my low end and mid-range 10% - couldn't be happier at this point
alaskanflyboy
Premium Member
That's pretty low for these bikes. I'd run some Sea Foam and see if it improves. After that, it'd be taking the tank off and seeing if there's anything in the air filter .It's not too common, but mice and bees do love areas like that if the bike sits long enough. It's why we cover just about every port and orifice on aircraft when we park them. If you want to go extreme, you'd be emptying the tank and pulling the fuel pump and seeing if the screens are getting clogged. The fuel filter is an internal component of the fuel pump, so I'm not sure if it is accessible or even replaceable/cleanable.
I got mine brand new and only got one tank of gas through it before power commander, exhaust, etc. The lowest I've gone is 28mpg but I filled back up after 20 miles just to see how low I could get the mileage, I spent the whole time pretty much high rpm and full throttle hooning around.
For what it's worth I drive it like I stole it and I usually see in the 35s, and that includes lots of stop signs and red lights since I commute. One summer I was commuting highway to a part-time job and saw about 45mpg even though I was doing 80-90mph the whole way back and forth. I've never gotten better than that.
That's odd? Stock gearing? All modded the bike still clock 43-45 MPG on freeway. I sort of put mine back to stock (almost) for my last big ride with +1/-3 gear. I was getting hi 40's low 50's MPG the whole time. Even got like 58 MPG on one tank cruising easy on the BRP..
Most of the riding I do the roads don't get above 45 speed limit but I'll go as quick as 65 or 70 in some stretches, but it's a lot of lights and stop signs, lots of quick acceleration and quick stop. Main problem is I'm heavy handed :thumbup:
I would like to mess with gearing for quicker acceleration, I don't highway ride too often. However, that's something I'll save for another thread.
Definitely a possibility. Since the speedo is off more the faster you go, it makes sense that if you do most of your riding above the speed limits you'd be more likely to have a discrepancy. But how much can 5 mph affect gas mileage numbers? It's probably easy but I'm dyslexic and between teaching classes right now, so I'll let someone else figure it out.
If you haven't changed plugs do so, and gap them to 0.028 in which is the lower end of the spectrum you will notice a peppier response and better fuel mileage, plus has wear-room so-to-speak on the gap tolerance.
Speedo is not off that far, maybe 3%, besides when you get the speedo mph correct the odometer is off slightly (under), before I got the Speed Healer Speedo adjuster I still got between 47 and 51 mpg @ 75 to 80 mph, dropping one tooth on the front sprocket didn't affect mileage at all, which I ran until stock chain (one link became rusted) crapped out (stock chain was old stock I suspect) @ 34,000 miles. I have a chain oil system I made now, chain stays nice and oiled.
When it is colder you will use slightly more fuel than normal.
Make sure the intake is not restricted by something.
Brakes aren't rubbing?
You are in top gear?
Clutch isn't slipping?
Just throwing things out that might cause fuel mileage loss.