If you get a lithium battery made for motorcycles, then no. The biggest issue is that old-school charging system. If you can find a modern replacement, it would be better for the battery.
The question I have is, why? A good quality AGM type battery will work better with your existing system, and last five years, or more, if maintained.
I was thinking about relocating the battery to have that empty triangle look under the seat. But if the bike would run better with the original style battery, I'll just keep it the way it is.
Thanks for helping out. Really appreciated