its a nice build, thanks for sharing, im also building an old yamaha scorpa maybe will do post about it. where do u live?
about the weight, the thing is if i go electric in trials i must be light, weight is king in trials , and as long ergonomy, balance and strength of the frame can handle , i saw u using Kelly i use to like for the power but it has allot of downsides, it usually has bugs, you need to connect to computer or buggy bluetooth , and it doesnt even display the right data. i had about 5 different kelys and use to like them until i tried something better ( Nucular)(Russian)
your bike uses domino , i also had 2 , and i dont like it as much as a mechanical throtle with an hall sensor , the domino throtle feel is still plastic and sharp, breaks easily also when u fall.
im using lithium ion, have 2 different batteries one 42h other 12h , i can run a trials competion till the end with a 12ah battery. weights nothing.
maybe you can come along to my garage and we can do some stuff together, i live in Bergschenhoek, close to Rotterdam.
i will finish the scorpa soon , i want to make sure to mount / weld silent blocks or rubbers to the motor in the frame to not crack the motor if i just welded to the frame its bond to break with the torque, i have a few motors but im thinking on a qs motor for it.
stage reduction will be perfect but not there yet first ill try directs.
i think to go further for stage reduction ill buy a better bike.