Help!!! Street Twin Is Playing Silly Buggers...!!!

They mostly just screw on and off sometimes with a ferrule nipped up, sometimes without. I recommend these

http://www.halfords.com/motoring/ca...MI8LDm-_3z2gIVhrHtCh3tNg1kEAQYASABEgL9a_D_BwE

that screw into the core of the HT lead and have insulted boots to cure the arcing. £8 will see you fixed.

 

I have no idea how long it should take to show a level but pretty quickly, I imagine. They are generally simple devices and yours has an in tank float on a lever arm (like most cars) that creates a variable electrical resistance as it rises and falls which in turn actuates the gauge with however many bars in the display.

Faults.....sender unit, gauge or connections. I would be checking under the tank for a dislodged wire. Beyond that, it is probably a dealer fix.

 

Ye Gods! A replacement sender unit is £125. I would expect £25 for a Mini and £50 for a Jag!

Fingers crossed it is just a bad connection.

 

If its like mine, it can take a couple of miles.

 

Same with my '17 T100. After filling up it takes a while for the bars to update and the miles-to-empty creeps up over a few miles. Was disconcerting at first but I've just got used to it. Although it's fine once the level has stabilised and registers the right values once I restart. If you've had the battery disconnected it may be different.

 

AndyC1 has a good eye!! I looked at the video a couple of times (full screen mode) and I did see the spark toward the rear of the plug at @17 seconds into the video. Everyone is probably right about the plug ends on the wires, but the insulator (white porcelain) on the plug could also be cracked and causing the problem. If the plug ends don't solve the problem, you might want to also replace the plugs.

 

Ref the fuel gauge reading, I've always assumed there's software intervening between float and gauge, when you've got your knee down halfway round that roundabout with bike at 60° fuel level in the tank is going to be different to sitting at the traffic lights waiting for your GP start. So I guess it takes an average over a time/distance span to give a steady reading - hence the delay.
And it takes a while to display any reading if battery has been disconnected (or ecu reset if memory serves correct).

 

I don't know if it's the same as the Tiger but if you fill up it will still register empty when the bike is restarted. The gauge is activated by pulling in the clutch so it takes a good few gear changes to show the correct level. This explains why some owners have no fuel gauge after fitting after-market levers - you have to get specific ones that activate the switch.