The stock KLR650 has a good clutch pack, but very weak springs.
Heavy duty Barnett Springs solve the problem without being excessively strong. They add effort to the clutch lever pull, but not too much. They increase clutch pack pressure from about 210lbs to 280lbs. Stronger than the KG or EBC springs.
Note: These springs were originally for the older Kawasaki ZX10, so there are 6 springs instead of 5.
Yes they are for all years. Do you have a specific year that you are questioning.