Thats is your fuel gauge, The filler cap is on the right side

SPEARKING - The fuel cap on the left is just for show. It usually holds the fuel gauge. If you have a look directly under it, you may see some wires coming out of a little hole. There is a small void in the tank directly under that cap that does not contain fuel. The fuel tank will also have a pipe that runs between the two sides under the front. This is used to balance the two sides of the tank and utilise only one filler cap.

Does that cap that you have been trying to remove have a fuel gauge in it?

99 evo tanks have two fuel caps ,no gauge ,as gmeikle  said  thats why u have a reserve . the left one undos clockwise if it is clicking you are doing it up , the right cap undos anti clockwise

go ebay , the is two types early and later for evo softails you will need 94  up,

I notice the first few responses mention fuel gauges with the assumption the bike is a later model...Not everyone can afford newer bikes and there are still a few of us that ride earlier bikes(how many I don't know)...Just thought I would point that out...

 

Cheers...Sparra

Grumpy - I don't think you can without major surgery. The cap on the left sits in a void that is not actually in where the fuel is. If you grab the fuel gauge and pull straight up, it will pull out nd you will be able to look in and see.

it is a pain on a softail with two tanks  left one takes it time to fill ,drains from right to left  if you only use your right cap and somtimes you can get a air lock because only the right cap is vented,thats why i fill left first than right .its more of a pain in the arse when you have a full tank of fuel ,parked on a hill and dont no you have a fucked cap seal  , get back to the bike fucken fuel all over it,had that happen once

Hey Spearking as others have said dont worry about blonde moments.

I had a 2001 Heritage, one filler only on the right. When the bottom feeders (solicitors) got that I bought an 87 softail and only filled it from the right hand filler, kept runnin out of fuel all the time, till I realised I was only filling half the tank!!

If ur havin a drama ask on here

someone will laugh at ya

someone will tell ya ur a dick

but usually someone will tell ya how to fix it

but then someone will tell ya thats wrong and to fix it another way

then those blokes will have a blue over whos right and whos wrong and everyone will forget that u asked a dumb question

Problem solved