Well,
I use a lithium in my race machine, but only for weight savings.
If you google problems with lithium youll find lots.
I dont think theres a benefit....
I had one in my MT-01, and it got cooked and died. Leaving me stranded in the middle of no where.
Lead acid is known tech. "slow" and "heavy", sure. But youll save a bit of cash too. If treated properly (put on a trickle charger) they can last a very long time like 10+ years....
ymmv