MOPED ARMY

Post a pic of what you have .

Here's a free copy of the service manual ( same for all years ) :

http://qt50.net/wp-content/uploads/2016/03/suzuki-fa50-service-manual-1980.pdf

Looks pretty neat to me .

The only wires exposed are the positive and negative battery connections .

A note of caution ::

If you pull either of the tanks , be sure the routing of the fuel and specially the oil lines are free of any kinks when putting them back in place .

From your need for a fuel gauge lens , I think you have a early '80 model .

Check your frame # to see if it's NO.3102978~ or before , if so it's a early model .

Then , here's a cover that should work :

Upper frame cover .

The gauge lens is part of the gauge and that is NLA .

Does the gauge leak ?

If so , maybe seal the hole or replace the tank with a late model tank , with no gauge .Late model fuel tank

The above cover is not necessary . It just keeps things in order and neat ( not rubbing on each other ) .

The seat support bracket is needed .

Have you tried removing the gauge and taking it apart to see if it could be sealed , internally ? Post pics of that gauge taken apart .

If that can be done , maybe find a lens that could cover the gauge face .

Do you want to use the gauge ?

If so do as I suggest .

If not , just pull the gauge out and find a plug to fill the hole , or , get a later model tank .

Putting any external sealant on that gauge is simply a band aid . Might work , might not .

Looks like your hunt begins for parts to make it work or a later model tank .

Or , visit Ace hardware and fit a nice tight drain stopper in that hole for a couple bucks , which you may want to do anyway , while you track down parts .

At least , you'd be able to use the tank .