How has that worked out?

I ended up buying this battery based on a recommendation that I believe was originally rooted here though I got it from the Facebook group. I bought it on Amazon. I figured for $15 it was worth a try.

Mighty Max Battery ML1.3-12 - 12 Volt 1.3 AH, F1 Terminal, Rechargeable SLA AGM Battery

If this doesn't work out all that well I might try the battery-less capacitor approach.

 

Should work fine. Two 400s here, two 12V conversions and  those work well in both.
 

Can you tell me what 12v bulbs you used in the instruments?

Also what turn signal flasher relay?

I see mention of 2 pin relays, my original relay is 3 pin and I'm planning to use LED turn signals.

Hi I don't suppose you have anymore info on that jumper wire info for the dt400 as I have a USA spec Dt400 and have installed Rex's 12 volt conversion kit and my battery is not charging.
Many thanks 
Vince