[airspro]

2700 plus miles on my Scrambler I just got 44.4 MPH , hit Res at 140 miles .

Last tank I got 44.8 . All stock but the seat , Dx windscreen and centerstand .

This last fill up I put in reg gas , can't see any differance so far . It doesn't ping , and I tried my best to make it do it . It does in fact seem to lug a bit better down low .

 

[Daveski UK]

Bonny fuel consumption

I get 52-55 mpg (US gal) on long steady day runs, but daily commutes drop me to around 46. I just can't fathom a 57% increase all of a sudden. Yeah my milage went up a little after break-in but not that much. Never heard of a Hinkley Bonnie getting 60 for an average. How many miles are you going to reserve or fill-ups? If your only going short trips then filling up, that leaves a lot of room for variation in your calculations. To get more accurate numbers you should ride till empty then fill up with 3 to 3.5 gal. That will give you a truer reading.

I only get about 82-92 miles per tank, that is about 32-35mpg [UK gallons], pretty poor for a low performance bike. Bonnevilles have poor fuel consumption for some reason, they should manage 50mpg but I think you would have to do a regular 30mpg to get that.

 

[airspro]

I just filled up tonight and got 45.56 mpg ( US ) . Also I spashed a bit by pulling the trigger a bit to fast too . I thought at the time I was certain to get less mph > spilled some > did the 1/4 run twice that tank .

But nope I got better with Shell Reg than Shell Prem that tank .

A nice note to this all is after I did the fast runs , my stock exhust is sounding a bit better I guess I have burnt , blowed out some of the packing . I can hear the bugger a bit now over the motor .

 

[surfdogx]

MPG's

I'm getting a solid 42.5 miles per gallon.
Consistantly since break-in after my first couple of tanks.
I'm using Shell Premium.
I run about 120 to 140 miles before reserve.
I ride hard and fast, like I stole it.
I'm gonna try regular next fill up and see if that changes my mileage.

 

[Scrambler57]

the supernatural is at work here

tsmgguy - you crossed the border one too many times and got trapped in the "metric dimension" and can now only experience kpgs rather than mpgs, hence the percieved mileage improvement.

Seriously though, I have a hard time believing the oxygenated fuel idea would account for such a difference. All my previous motorcycling was done in Colorado where we too used oxygenated gas. While I remember some improvement in summer mileage, it was on the order of maybe 10-15% and could just as easily be attributed to the warmer temps enabling the bike to run more effeciently. Hopefully some other high elevation riders will weigh in and give you their thoughts.

 

[SixtySpeedTwin]

mileage - ethanol??

I have just checked my i-pod gadget and it says i have been averageing 49mpg.

its a mixed town / highway / single lane 30 mile round trip commute.
My bike is a stock o8 scrambler with 1550 miles.

Whats the ethanol in the fuel for, i dont think we get that in the UK or winter fuel.

Cheers
Clive

 

[Scrambler57]

Whats the ethanol in the fuel for, i dont think we get that in the UK or winter fuel.

Cheers
Clive

Clive - Ethanol is blended in to help reduce carbon monoxide buildup, which occurs in many cold climate US cities in the winter where it regularly gets close to or below 0 degrees F. It helps them meet emissions standards. Since the UK doesn't have the cold winter temps that much of the US does, there apparently isn't any need to use it.

Also, the ethanol special interest group is as tough and politically dangerous to say no to as the Mafia

 

[SixtySpeedTwin]

etanol

Cheers for the explanation scram.

c

 

[jjimmydutch]

gas mileage

I have 800 miles and aI,air box removed, rejetted 140/40 1 shim, Hyde Togas and get 42mpg.Just had the first oil change.

 

[disco4u]

I ride a 2003 T100 will 11,000 miles on it. I get about 53 on the highway and 45'ish in the city. I'd have your speedo checked.

 

[drharveys]

I've been getting some crummy mileage for a while, but it was all short trips except for one ride to a rally two-up with all the gear. This weekend I was able to fill up and burn a tank solo. 124 miles, 2.66 gallons gave me 46.6 mpg with the summer screen.

No complaints!

 

[jet987]

I get 42-44 mpg on my 2003 T100 with TOR mufflers rejetted, half city riding in stop-and-go Chicago traffic below 35mph, half highway riding at 70-75mph. Shell 89 octane. 2700 miles on the bike now.

 

[Daveski UK]

I find the fuel consumption on the bonneville is poor for the weight and performance of the bike. My old 1970s Goldwing GL1000 would give me 45mpg and that weighed 600lbs and was 80HP. My Ford Focus 1600 car does about the same and that weighs god knows what and pushes 115HP. With modern technology the bonny should be doing 60mpg easily. I get around 32-35 from my T100.
UK Daveski

 

[Daveski UK]

Fuel Consumption

Examples of MPG on some of the previous bikes I have owned.
Bike Year CC Top Speed MPG
Triumph T100... 2007 865cc 110 37
Triumph T140V 1979 744 110 50
Suzuki GT 250 1973 250 95 40
Suzuki GT380 1977 380 100 38
Suzuki GT550 1976 544 110 27
Suzuki GT500 1977 499 110 40
Suzuki GSX750 1981 750 130 45
Honda GL1000 1979 999 125 40
Honda CX500 1978 500 110 60
Yamaha SR500 1978 500 90 65
Yamaha XS400 1980 399 95 75
Sanglas 500S2 1981 499 90 78
Yamaha VMAX 1984 1200 150 30
H/D Softail 1999 1340 80 50
BSA A10 1960 650 105 55
Royal Enfield 1962 250 70 90
Yamaha FSIE 1976 49 55 120
Mindless drivel I know, but kept me amused for 5 minutes.
UK Daveski

 

[propforward]

I think somethings not set right on your bike.

I get 43 miles to a US gallon on mine, which to an imperial gallon is about 52 miles or so, and mine isn't set right either, it's quite rich. Others have reported 50 miles per US gallon with stock set ups, which essentially matches what you think, so something is quite amiss.

 

[enlightened rogue]

'08 T100 here. Rode it easy during 500 mi. break-in, consistently got 42 mpg then. Now (900 miles on the odometer) I find myself goosing the throttle a lot, and the mileage for my last couple of fill-ups dropped to 35 mpg.

 

[ARC]

crappy mileage?

2008 bonnie, 250 miles on the clock, completely stock.

today i hit reserve at 89 miles from a full tank.

according to my calculations, 89 miles @ 3.59 gallons = 25 mpg

that doesn't seem right at all.

running shell 93 octane, weather is between 40 - 60 deg. F
mostly short trips, lotta stop n go.

what do you guys think?

 

[andyw]

I get 21km/litre out of my t100 at sea level 25C temperature at average speed of 100km/hr.

60 miles per US gallon works out at about 25km/litre. Not too far away from what I see - altitude may account for some of that difference. Increasing altitude to 4000ft would I suspect add 10% fuel saving which would take it to around 23km/litre. Air temp will also have an effect on this as well - whats the current temperature there (is summer here).

 

[propforward]

ARC,

don't sweat it too much yet, get a couple thousand miles on the bike so it's good and broken in, and do your mileage check on long runs rather than stop and go. Stop and go traffic ruins mileage results.

I personally don't really give a hoot about mileage, as long as my bike is running well, I am happy.

 

[Baltobonneville]

2008 bonnie, 250 miles on the clock, completely stock.

today i hit reserve at 89 miles from a full tank.

according to my calculations, 89 miles @ 3.59 gallons = 25 mpg

that doesn't seem right at all.

running shell 93 octane, weather is between 40 - 60 deg. F
mostly short trips, lotta stop n go.

what do you guys think?

I don't think that you burned 3.59 gallons to go 89 miles. How do you figure 3.59 gallons?

I sometimes hit reserve at around 90-100 miles, especially if I've been carrying a passenger, but it takes less than three (US) gallons to fill up at that point.