rim - crown problem

[gamba24]

Hi guys, I'm searching this spare for my rim, Its should be bushing for fixing crown.
Very hard to remove!!!

Have you any advice please?

 

[drewpy]

provare qui
http://www.cmsnl.com/yamaha-xs400sh-1981_model8826/damper_1u42536400/#.V2UlnRKDNoI

 

[gamba24]

great!!!
A huge thanks drewpy.

now I remove the damper. Is very difficult.