I have a Club Roost VCV2100 and the rear swing arm pivot has seized. The aluminum tube running through the frame has seized and no longer rotates with the swing arm that clamps onto it. Is this a job I can do myself as someone said if I can drift out the tube and clean up the bushes it might be OK and not require any new parts. I am obviously new to mountain biking but more importantly lacking funds.

Any suggestions will be gratefully accepted.