Triumph Rat Motorcycle Forums banner

T100 bonneville fuel mpg.?

55K views 153 replies 86 participants last post by  blutoyz  
#1 ·
I only have 1k on my new bike,getting only 33 mpg.
Fuel light comming on at 100 miles.
Setup= nh togas+arrow 2/1 tune.
 
#3 ·
08 T100 with Dominator High-Torque pipes and TPUSA airbox.
Fairly aggressive rider 42-44 mpg.

As your bike continues to break in, the mileage will get better. Bonnie's aren't fully broken in until around 5k miles. Enjoy, and make sure you run the motor up to the rev limiter every once in awhile to help break it in correctly.
 
#4 ·
33 mpg's seems low to me...I average right around 45 mpg's in town tooling around in a very spirited fashion and running hard in the canyons. My reserve light comes on consistently at 130-135 miles. On the rare occasions I get to cruise in top gear for a while, I approach 50 mpg's.


Bob
 
#7 ·
Low mileage during break-in



I sent a very similar post out when I was breaking in my 2009 T100 w/ Predators. I received good advice to be patient. My mileage got much better after break-in. I now average between 40 to 50 mpg depending on how aggressive I'm riding. By the way, if you're doing a lot of stop 'n go city driving, you will probably experience below 40 mpg.
 
#10 ·
About 20k miles on my '09.

City, about 33 mpg
Highway about 50 mpg

It's been like since the day I got her.

Running BC Sleepers with Arrow 2 into 2 map.
 
#27 ·
I also have a 2007 T-100 (carbs). Bought it second-hand in 2011 with ~7800 miles. No mods that I know of. All stock. Fully serviced.

I’ve only done about 1000 miles on the bike. I’m averaging 35mpg highway (doing 70/80mph) and some very sad 20-25mpg urban :eek:. I’ve been refueling with 91 (AKI).

I’m only 5'7 and 150lbs and don’t ride it particularly hard. I’m a newbie so maybe I’m being inefficient with my gears and throttle.

What am I doing wrong?
 
#14 ·
Your bike isn't broken in yet but you do have some mods. Have you or the dealer done anything with the fueling? I also wouldn't use the low fuel light as an indication of the MPG. When you do re-fuel just take a good measurement of how much it takes to fill up and every time you do fill up, try to keep it at the same level. Do that a few times then calculate your mileage.
 
#19 ·
I am truly amazed at the vast range of fuel mileages that have been posted in this thread...33 mpg's on the low end and 73 mpg's on the high end. A 40 mpg spread.... I can appreciate differences in fuel comsumption between EFI's and carbed Bonnies but to see this range is truly amazing...just saying.


Bob
 
#21 · (Edited)
2010 T100, stock, 750 miles on the odometer--mostly city, some canyon, no freeway.
Getting 57 mpg (non-imperial gallons) most tanks. High of 63 mpg one tank. Low of 52 mpg one tank.

Top up the tank to the same level visible in the filler tube.
Using 87/88 octane.

From Meloman's comment, it sounds like AI removal and TORs would improve gas milage. Is that other's experience too?
 
#22 ·
Hello,

'09 T100 with Dominator Touring cans, K&N high-flow air filter and Arrow 2-2 remap. 8300 miles. I averaged around 39mpg before the Dominators and now average 43-44mpg. I am pretty heavy, though, so I make her work hard to pull my big butt around. I also like to let her rev, you know? I see little or no difference in mpg using premium vs regular gas, but usually use premium. My fuel light comes on at around 130 miles or so.

Cheers, Joe
 
#25 ·
Have not reviewed all of the responses to your post, but 33 mpg is pretty normal for around town riding. The engine has a very heavy flywheel, used for vibration damping. That flywheel has to be accelerated along with the other moving parts of the engine, and that takes fuel.

My Ducati weighs about 45 lbs empty less than the Bonnie, and both are small bikes. The difference in weight is almost entirely in the engines alone.

Once I'm out of the open road, my Bonnie really shines in the mpg department; I'll generally see better than 50 mpg. Yours should be about the same, unless you have a really heavy throttle hand.

I see the same numbers with the Ducati, with its precise Marelli ECU, fuel injection, and dual ignition. The Duc also has desmodromic valve actuation, which makes for better fuel efficiency, so the Bonneville's gas milage is still impressive by any standard.
 
#29 ·
05 with 52,355 miles on it with gutted airbox and pods see signature i stay around 43-45 mpg, run it up around 90mph(gps reading) and it will get 38-40 mpg. i can live with the mileage.
 
#30 ·
I normally get 40-50 mpg city/fast hwy(over 65 mph). Normal Hwy under 65 but over 55 has seen a high around 70. Your gas milage will improve once the bike breaks in. Many things effect gas milage.
(1) Ambient air tempreture. Experienced riders, have you ever noticed the first tank of gas of the day lasts the longest. If you will be riding ALL Day, Fill the bike in the morning..as the day warms up the fuel expands..you can easily pull an extra 2-3mpg
(2) How much ethanol is in your fuel. I am willing to bet California fuel is a consistent 10% ethanol. The lower the ethanol content the better the fuel milage. If you have been buying gas in the same station...change brands of fuel.
(3) Check your air pressure.
(4) If you regulary ride the highway...a windsheid will cut wind resitance.
(5)The enrichner(choke)should be off as soon as possible. Letting the bike idle until warmed up just wastes fuel. Usually after one mile of riding you can shut it off.
(6)Ride the bike in the highest gear you can without lugging it.
(7) When it comes time to change the oil use a full synthetic motorcycle oil.
Altitude, outside tempreature, road surface, laden weight (yes us fat guys burn more fuel) will all have an effect.