Welcome , I run 300s myself , how's about a pic of what you are working on ------- there is a lot of info here but it is very hard to navigate and find ----- maybe try The Honda 300 Club on facebook
IAlso my front brakes and rear brakes are shot. I’ve changed the pads all around, new cables, new MC, bled them a million times correctly with a bungee on the lever while opening the bleeder. I adjusted the pistons in the front drum and got them to move with no pads excellently, but with pads just the slightest. Pistons are shot ?