I can do it blind folded, do you have any mechanic skills? Kart brakes are very simple devices but you see guys on here all the time having tremendous difficulty. I’d suggest taking them apart for inspection before you buy parts. If the bores are badly pitted new seals won’t help.
FAA certified jet engine and aircraft technician,
Nicholson Speedway class champion 2001,
Yamaha KT100 Service Center,
41 years karting experience