Fuel Gauge needle moving with revs issue

[Tarlow]

The diagram you posted for the non battery model has 4 pins, there are only 2 wires to the regulator and what looks like 2 wires to the outputs of which one is the horn. For what it costs, its got to be worth getting it , connecting the 2 wires to the regulator as per diagram and then measuring the DC output using your meter as per diagram. If you get around 10VDC solid through the rev range , then jobs a good un.. you just then need to adjust the resistor to get the correct readings on the gauge- OR take a road trip to Derbyshire England and i do it myself....

The link you posted is for a regulator/rectifier. Do you mean I should somehow hook it up as per the diagram to the current 3 pole regulator, or just replace the 3 pole with this 4 pole?


In which case the hot wire incoming from the stator would connect to either G, and the wire going to the circuit (and gauge) to the A, correct? I might actually be able to borrow a similar regulator from a different scooter to try it out.

 

[plugsandsparks]

There does appear to be an issue with the diagram as the fuel gauge looks to be fed by AC, as i think (its hard to tell and someone has used a highlighter on it which makes it difficult to check colours BUT a regulator/rectifer is much more useful than separate items for sure. It sounds like you have a regulator but not a rectifier, hence you get a nice even AC voltage but very little DC. Its certainly doable to get rid of your exiting regulator and replace with a combined device like the one mentioned. You will need the instructions that come with the device to ensure the correct wires go to the correct terminals, the one in the picture i think tries to help but i cannot make it out.
Also the diagram appears to show a low fuel light - but cannot be sure.

 

[Tarlow]

Yes, the fuel gauge is fed by AC, and the diode keeps the current going one way.

There is a low fuel warning light, whose circuit closes once the float reaches the lowest point of the sender range. That works fine.

Here's the diagram without the highlights: