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Sportster Motorcycle General Discussion and Problems For discussing problems about your Sportster motorcycle that don't fit anywhere else.

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  #1  
Old 24th May 2009
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Default Nightster/Sportster Fuel Milage

Hey Guys, Since I've bought my '09 Nightster back in August of '08 I've always been re-setting my trip meter every time I fill up to see the milage I've been getting on each tank. Im getting about 130Km -140Km per tank. Up here in Canada we are on the metric system so our bikes are measured in Kilometers. That is roughly 80-85 Miles per tank. I was told at the HD shop that I should be getting approx. 200Km per tank or about 124 Miles per tank. I'm always filling my bike with a good premium 91+ fuel and I also have a power commander which supposedly helps fuel efficiency. Im also running a Vance and Hines RSD 2-into-1 exhaust and a Vance and Hines RSD Air Cleaner. Does the extra mod's help or ruin fuel milage? Will Mod's like these really run my fuel down an extra 60-80Km per tank? Most of my Km's are put on through city driving and the occasional drive to work when the weather calls for it (I live in Lethbridge, AB, Canada so the riding season basically just started) What kind of milage are you guys getting on your bikes? City or highway driving? Should I worry about this? Any tips or other ideas when it comes to improving fuel milage?
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Old 24th May 2009
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Try not resetting your trip meter for 3-4 tanks and mark down how much fuel you put in each time. After 3-4 tanks figure it then that will be a better average of your mileage, it will combine city, hwy, days with more stop/go and days with less. You can change your riding style day by day. How many miles do you have on your bike now? Are you still within the break in miles?
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Old 24th May 2009
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Quote:
Originally Posted by xlcruser View Post
Try not resetting your trip meter for 3-4 tanks and mark down how much fuel you put in each time. After 3-4 tanks figure it then that will be a better average of your mileage, it will combine city, hwy, days with more stop/go and days with less. You can change your riding style day by day. How many miles do you have on your bike now? Are you still within the break in miles?

Ya thanks - good idea. I've never really thought of that. Ill make sure not to reset my trip meter everytime. I have about 3650Km on my bike right now. I just recently had a Vance and Hines fuel pak on my bike as well and quickly removed it as I was told that these fuelpaks are very hard on a bike.and can void the warranty if I ever have any engine troubles. Once removed I added a SE power commander and I can already tell that my bikes improved in power and on fuel economy. Not that I bought the bike because I was worried about fuel consumption but It just had me a little baffled.
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Old 24th May 2009
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Mileage does very depending on tuning, rider habits, elevation, city or highway..

I've gotten low 90's to 130 range on a tank full with the 3.5 gallon tank, I also try to stop at big name gas
stations to avoid most that use 10% ethanol mixed in if that matters, but it does make me feel better..
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  #5  
Old 24th May 2009
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You don't need to wait for 3 - 4 tanks to figure out an average over the long term. Every time you fill up, figure out your mileage. After 4 tanks, just add up you 4 miles per gallon figures and divide by 4.

Funnily enough, I just did this before turning on my computer and see ing your thread. Over the last four tanks, I'm averaging 33.99 miles per gallon. I'm in Calgary, so our elevation and fuel should be comparable.

I've been worried about my mileage since doing my stage one last spring. Before stage one, I used to get about 300 KM out of a tank of gas (somewhat into reserve), and now I'm around 230 KM per tank (4.5 gallon).

Given the extra power of the stage one, I'm sure the fun factor of twisting the throttle has affected my mileage, but I thought it would be less than it was, especially after reading that so many people are still getting 45 - 50 miles per gallon after stage one.

I would think that fuel injection would do better than a carb miles-per-gallon-wise.
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Old 24th May 2009
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I get about 53mpg(about 160 a tank) highway and like 34 city cause i ride hard in the city on my 08 Nightster with V&H Short Shot, SE Stage 1 intake, and a remap.
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Old 25th May 2009
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Quote:
Lenster
especially after reading that so many people are still getting 45 - 50 miles per gallon after stage one.


I've routinely have had 45-50+ miles per gallon days with a stage 1 carbed bike
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Old 25th May 2009
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Your loaded map in the pc3 or which ever might be on the rich side. You can use the software you look at what is loaded in you powercommander. Generally I think downloadable maps are richer since they concern less restrictive exhaust. It's better than leaner which could heat and burn engine. Look for different maps for your bike. You can always look at what maps you download with out hooking up to the bike. Doing so you'll be able to compair between different maps like your stock map.

Your only choice for getting map right is having the bike dyno tuned for the map. Then the map might not be too different than whats loaded now. So eh whatevers. You can get just the dyno run where it will show power, torque and fuel flow being lean or rich in a line format.

There was an update for my pc3 firmware and it is highly adviseable to do it. Matter of fact do it if your model has a firmware update available. My GSX-R1000 would fall flat on its face with an FI light when flying past 8000 rpms. Not fun when going for the gusto.

Oh yah if your bike is in the break in proccess its just a caase of the rings aren't set and you'll burn more gas during that period. Hvae fun.
Make sure you do the compair maps using your bikes loaded map and what is the stock map in the companies files for download.
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Old 25th May 2009
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Quote:
Originally Posted by Bobbed87 View Post
I get about 53mpg(about 160 a tank) highway and like 34 city cause i ride hard in the city on my 08 Nightster with V&H Short Shot, SE Stage 1 intake, and a remap.
I haven't done any full tanks on the highway, my mileage is city.

Quote:
Originally Posted by xllent01 View Post

I've routinely have had 45-50+ miles per gallon days with a stage 1 carbed bike
Highway? What would it be City?
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Old 25th May 2009
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Try calculating your fuel mileage, i.e.; fill up, reset your tripometer, and next time you fill up, take note of how much you put in, and how many miles you've gone since.

Are you saying you get that mileage before your fuel light comes on? Because my light is overly sensitive, and this is fairly common. It should go off with .8 gallons left, but mine goes off when I've got about 1.3 gallons left. I have plenty of gas left when I hit the 90-100 miles mark. And at a stretch one time, about 130 miles on one tank, I didn't put more than 2.8 gallons in it to fill 'er up.
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