Fuel Guage 2018 Speedmaster, Bobber, T120

Experience with my 2018 Speedmaster is that light has 3l left on 12l tank, so 1/4 left. Even with metric measures that should give 60km/35miles.
I’ve been doing 210km with a bar left which would point to 240km/150miles. I think there may even be more based on quantity to fill on the stand not being 9l when light first comes on. Hope this helps

 

on my 2018 T120, the fuel gauge at full reads 190-200 miles, fuel light at about 140-150.

 

Yep my speedmaster is about the same. Average mpg is at 66mpg on the computer (which I have not reset since new) and when I fill up it shows cicra 120 miles range. Reserve light normal comes on at around 100 to 110 with anything from 30 to 35 miles range left, so I reakon that if I ran the tank dry it would return circa 150 to 160 mpg.

To be honest I don't think the guage is designed to be that acurate, only there to provide a guide on fuel levels and range to run out. Running around locally I don't monitor or worry about how much fuel I have on the bike. If I do travel further afield I usually plan my refueling based on 100 mile stops.
Wessa

 

Fuel Capacity on T120 is slightly higher at 14.4 L / 3.8 US gal / 3.2 Imp gal

 

How you getting 64mpg when I'm @ consistantly at 46mpg. I go fast but not that much.
Speakes to accuracy not to be trusted. Keep her topped off is all I can do.

 

Hi Burglar, Fuelly website has you about right for newer 1200, at 48.2 mpg

 

Regardless of actual mpg issue is accuracy of miles left to fill. To this I have only got down to 30 miles left.
Probably need to run her dry to find out. If I do that I'll let you guys know.

 

Sorry to be late contributing to this thread, but you must compare apples with apples. 64mpg quoted is per UK gallon which is 20% more than a US gallon. Your 46mpg to the US gallon equates to around 55+mpg in UK terms. Hope you feel happier.

 

I have a Street Twin and don't rely on the computer gage. (similar experience). I know my bike gets 65+ MPG as I normally ride so can go maybe 200 miles to 'empty'. To be safe I fill up at <150 miles. I fill up probably more often that I need to - but I have never run out of gas !!