Hi,im based in cannock staffs,have a 1981 cb 650 which im trying to get on the road.having trouble with carbs

cleaned them several times not balance and causing clutch to rattle at low revs.going to get overhaul kits,but some say they are a waste of time and money?also need brake master cylinder and two brake pistons and seals.are there any members in my area?
Thanks
redbaron