If you use your bike daily , it is not such a problem but if you use it infrequently then you really should use a Pressure Valve Regulated , Absorbent Glass Matt battery (PRV AGM ) and for our bone shakers , spiral would cells are even better.
Cyclons are the only battery that ticks all the boxes.
If you use it regularly then Scorpions ( or simiar ) will do.
Now here is the big trick.
Wire a plug to your battery so that you can paint over the connections leaving them corrosion free for ever.
Other members used to call me a liar when I turned the headlamp on & told them it was a standard set up , with a standard globe & running 6 V.
The difference was that the globe actually got a full 6 V ( 7 V when running ) because all of the contacts were clean.
There was a bod at one of the ABR's rubbishing the "Prince of Darkness" over his dull headlamp.
He had a 12 V A65 & when we measured the voltage at the globe it was 4.5V .
He lost over 2 V at the filthy corroded battery terminals before we got into the wiring proper.
