Fuel light issue

Montanarolo Posts : 21 Join date : 2020-09-09

Hi more questions sorry
Fuel light coming on early
twice now from full tank the fuel light comes on after I have only used around 8 litres of fuel
is this a known issue?
sort of related I have no idea how to set trip meter
TIA Steve

Don Abbondio Posts : 4401 Join date : 2014-03-13 Age : 65

Pick the odometer you want to reset, press the button for a long time (long press, a few seconds) and voila! Mileage reset. Technology is wonderful, innit?

GRiSO Capo Posts : 7820 Join date : 2013-09-30

Fuel level sensor is a thermistor strip attached to the fuel pump. You can check its functionality with a multimeter.

Measure across pins 3 & 4.

250-300 ohms is 0 litres (empty)
100 ohms is approx 11.25 litres
10-20 ohms is > 16 litres (full)

Fuel light comes on at approximately 230 ohms. The sensor is not available separately from the fuel pump assembly.

Montanarolo Posts : 21 Join date : 2020-09-09

Thanks Beetle

GRiSO Capo Posts : 7514 Join date : 2013-05-30 Age : 63

Isn't it? I'm pretty sure I've got one in stock???

GRiSO Capo Posts : 7820 Join date : 2013-09-30

Well, bugger me lonesome...

Part # GU887790

It's not in the parts list...well I couldn't find it. Google found it. Rolling Eyes

Montanarolo Posts : 21 Join date : 2020-09-09

Thanks will test mine tomorrow

Montanarolo Posts : 21 Join date : 2020-09-09

Feck me £131 !!!!!!!!!!!

GRiSO Capo Posts : 7820 Join date : 2013-09-30

There's this one. AP8127817

It's cheaper..but is it correct?

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Montanarolo Posts : 21 Join date : 2020-09-09

strangely it seems to have fixed itself
did 110 miles yesterday still no fuel light
thanks for all the help
Steve b

Tanabuso Posts : 63 Join date : 2018-04-08

steveb wrote:: Feck me £131 !!!!!!!!!!!

Glad it fixed itself.

The sensor that beetle refered to can be repaired for about $5-10. I did it on my Breva.

Montanarolo Posts : 21 Join date : 2020-09-09

antmanbee
prey tell more?

Tanabuso Posts : 63 Join date : 2018-04-08

steveb wrote:: antmanbee
prey tell more?

This thread has all the info you will need.
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Don Abbondio Posts : 75 Join date : 2015-12-20

not sure if you knew, but if you run on "reserve" with the light on that once you get really low it flashes - then you panic [You must be registered and logged in to see this link.]

Montanarolo Posts : 21 Join date : 2020-09-09

I did not know that
Thanks

GRiSO Capo Posts : 529 Join date : 2014-04-24 Age : 72

Me neither. And I thought I've been dangerously low on occasions.

Biondino Posts : 254 Join date : 2018-04-13 Age : 61

That's a bonus feature.

I don't recall the manual mentioning that.

Grignapoco Posts : 156 Join date : 2016-09-09

Mine usually does around 110 miles before the fuel warning light is on.
With current UK prices I get £16 in the tank when the light first illuminates.
Fuel sensors don't like sulphur in fuel - try to avoid budget / supermarket petrol where possible.
A fuel system cleaner can help with sensors in the tank.
In the UK Esso 97 is currently ethanol free (still has E5 on the pump handle).

Sfregiato Posts : 421 Join date : 2017-11-10

beetle wrote:: Fuel level sensor is a thermistor strip attached to the fuel pump. You can check its functionality with a multimeter.

Measure across pins 3 & 4.

250-300 ohms is 0 litres (empty)
100 ohms is approx 11.25 litres
10-20 ohms is > 16 litres (full)

Fuel light comes on at approximately 230 ohms. The sensor is not available separately from the fuel pump assembly.

steveb wrote:: strangely it seems to have fixed itself
did 110 miles yesterday still no fuel light
thanks for all the help
Steve b

Was the bike sitting for a while?
I was wondering if varnish built up on the rheostat so it lost contact (>300 Ohms) and it's worn off with use fixing itself.

Montanarolo Posts : 21 Join date : 2020-09-09

Not sitting before I bought it
hit 132 miles yesterday before the fuel light came on