the D31A for the starter battery fits but i use the blue top D27M in the arb tray the blue top has bean in there from 2014 but is on its way out now.
the yellow top has bean in for 2 year so far
just remember the arb tray is rated at 25kg
I used the blue top as I was told it will stand up to the vibrations better because the betting they take in a bout
if you pm me with your number I can send photo.