Fuel Guage 2018 Speedmaster, Bobber, T120

Beerman · Sep 17, 2018

I'm finding it difficult to read the electronic fuel guage on the Speedmaster 2018. It's a 'miles left in tank' range reading, and even when full it rarely shows much above 120 miles (when I think there is 160 miles + in the tank). The mpg reader says that I am averaging 64mpg. The 12 litre tank, when you do the arithmetic (and assuming we're talking UK imperial gallons) at 64 mpg yields 168 miles in the tank - the reader is quite a long way off that.

What it means is that when the 'guage' says I have 20 miles range left, I really don't know how accurate that is.

I'd be interested to know if this is a widely held view on the accuracy of the guage - or not. I guess it's the same on the T120 and Bobber, at least.

Beerman

dilligaf · Sep 17, 2018

Same here mate but I don’t think I’ve ever had a bike with what I would call an accurate fuel gauge
I do like the guage on NUDGER because it gives a good idea of range left
I particularly like the way it recalculates the range left depending on how hard your working the engine eg hard accelerating and uphill and the range drops off easy cruising and downhill and the range increases
A good example of this is when I’m using my trailer full of camping gear and alcohol
After leaving the Spat out of Hull rally on Sunday I decided to fill up before heading home as I was waiting for traffic to clear so I could exit the garage I checked the range and it said 128miles as I accelerated through the gears to fourth I checked again and it had dropped to 93mile range
Riding through Yorkshire countryside it fell as low as 72mile range this was using mainly third and fourth gear
After joining the A19 dual carriageway and cruising at about 80mph mostly sixth gear it settled for quite some distance at mid 80s range
When I got home it said I had 42miles left to go
Helmsley where I filled up is about 65miles from where I live giving me and NUDGER a range of over 105miles pulling a trailer and riding quite hard
I Reckon NUDGER is good for over 150miles per tank without the trailer but when the warning light comes on I’m looking for a garage regardless of what the range says

Dartplayer · Sep 19, 2018

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

David Simpson · Sep 21, 2018

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

Wessa · Sep 21, 2018

Beerman said: ↑

I'm finding it difficult to read the electronic fuel guage on the Speedmaster 2018. It's a 'miles left in tank' range reading, and even when full it rarely shows much above 120 miles (when I think there is 160 miles + in the tank). The mpg reader says that I am averaging 64mpg. The 12 litre tank, when you do the arithmetic (and assuming we're talking UK imperial gallons) at 64 mpg yields 168 miles in the tank - the reader is quite a long way off that.

What it means is that when the 'guage' says I have 20 miles range left, I really don't know how accurate that is.

I'd be interested to know if this is a widely held view on the accuracy of the guage - or not. I guess it's the same on the T120 and Bobber, at least.

Beerman
Click to expand...

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

Dartplayer · Sep 21, 2018

David Simpson said: ↑

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

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

Burglar · Nov 26, 2018

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.

Dartplayer · Nov 26, 2018

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

Burglar · Nov 27, 2018

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.

Drummer · Mar 4, 2019

Burglar said: ↑

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.
Click to expand...

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.

BigCLM · Mar 4, 2019

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 !!

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