Acewell Speedometer

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Well that's good news Mohamad, we'll do one thing at a time so no-one gets confused.

The same thing now needs to be set in the same menu to adjust the fuel gauge so it indicates the correct amount.
We start by assuming that the tank is neither full or empty so we should expect a reading somewhere halfway.

The meter is useable for many types of motorcycles according to the manufacturer, it has therefore 7 different settings to adapt to the ohms resistance of the fuel sensor in the tank, this sensor is somewhat similar to a volume control on an amplifier or radio exept there is a float mounted on the shaft instead of a knob, it is a variable resistor ( r is the symbol for resistance and relates to how electrically big the sensor is ) and changes it's value depending on the height of the fuel in the tank which is what the meter interprets as an amount of fuel in the tank.

So in a similar way the fuel meter has to adapt itself to the value of the fuel level sensor in the tank, since different values can be used you have to tell the meter which one adapts best.

This is done in the same mode settings under number 11;

"11. It displays “100r” and fuel tank symbol, follow the item 2 to select 100,
250, 510ohm, oFF, -100, -250 or -510Ohm and jump to sensor type of
LAP timer setting. The fuel meter bar will disappear if you select oFF
mode"

Notice there are 7 different settings in this part starting with 100, off and --100 etc. notice that the last three settings are negative, i have no idea why but be aware of this, they are not the same as the first three.
Your part is to select the setting that gives the best useable result out of these 7 values, it's just a matter of finding the best setting by trial and error, if you have a sensor with a resistance of --250 ohms you have to select --250r.
Also the fuel meter could be set to off in which case nothing will be displayed on the meter which could be the case in your meter.

The relevant wire to use for the fuel gauge is "gray/black", just in case you used a different one.

This setting could take some time to get indicating correctly depending how often you fuel up but something should start indicating when the settings are changed.

If you decide to siphon some fuel out of the tank it is worth noting that the float for the fuel sensor is in the left side of the fuel tank and should be avoided to touch since it can be damaged easy and is difficult to replace.

Here is how your pdf manual describes what i just explained;

"FUEL GAUGE"
1. Has 7 bars to indicate how much fuel remains.
2. Built-in 100, 250, 510Ohm, oFF, -100, -250 and -510 Ohm fuel sender
resistance, the fuel bars will disappear when you select “oFF” mode.
3. The full bars are low resistance and empty bar is high resistance for
100, 250 and 510ohm; -100, -250 and -510 ohm are the inverse.


2. User has to train the gear indicator before use it.
Fuel Bar & Resistor Value
Bars 100r 250r 510r -100 -250 -510
7 0-10 0-25 0-50 100-90 250-230 510-460
6 11-20 26-50 51-100 89-75 229-200 459-380
5 21-35 51-85 101-180 74-60 199-150 379-300
4 36-45 86-110 181-230 59-45 149-110 299-230
3 46-60 111-150 231-300 44-35 109-85 229-180
2 61-75 151-200 301-380 34-20 84-50 179-100
1 76-90 201-230 381-460 19-10 49-25 99-50
0-Flash 91-100 231-250 461-510 9-0 24-0 49-0


See which one you like best, that should keep you busy for a bit and let us know how it went when you have finished this part, i tried to be as clear and complete as i could and it takes a bit of time to explain this stuff, cheers