Removing and installing lock barrel
Remove luggage rack.
Remove seat lock.
Disassemble seat lock on key side (2 screws) and carefully spread it open.
Press the keeper (arrow) of the lock barrel into the housing and use the key to pull out the barrel.
Lubricate the new lock barrel with Shell Retinax A.
Press lock barrel in until keeper engages.
Installation is the reverse of the removal procedure.