Can't tell how he did it, but for my 87 GL1200A I used a mini bench top press from Harbor Freight, then places a adjustable oil filter on over the center of the spring landing on the spring. Pressing that down with the press released pressure on the retainer ring to the get the circlip out.

I used a c clamp to remove it, but did something similar to how you did on reassembly with a press

@@MotorbikeGarage603 Thanks. But, why was that key not fitting at : 9:25 ? Thank you.

@bustjanzupan1074 The tool I was using wasn't the right one. It was for a different size nut, so I had to improvise.

@@MotorbikeGarage603 Thank you. Because i was just searching for these keys for these nuts, but, it seeems as they ar ehaving a little biggr ( KM4) and a little smaller (KM3) keys/nuts, but just not these ones for 23/28 mm . We will see if we can buy something more right, tomorrow , here in the old Eu, to dissassemble the engine apart, because of one piston not having compression. Thank you. Peace with you from old Eu.

AIR FILTER ON A 2006 WING ----- ALL OF THOSE ** PLASTIC PIECES , CONNECTIONS ---- MAYBE DESIGNED FOR THOSE DEALERS SERVICE DEPARTMENTS , LABOR RATE & TIME TO COMPLETE ????? **** MY WINGS ( TRIKED ) ***** C L U T C H IS GONE , FOUND AN INDEPENDENT CYCLE MAN ***** W I L L I N G TO TACKLE A RE- BUILD , HOPEFULLY LESS $$$$$$$ INVOLVED , LUV MY " TRIKE " BUT WINGS ARE " TOO ENCLOSED " , TIRES , OIL CHANGES , BRAKES , COOLANT CHANGES , SPARK PLUGS , CLUTCH / BRAKE FLUID ARE FAIRLY EASY TO DO ------- B U T *** S O M E WING THINGS ------- ???????????

Master/slave cylinder good?