Yesterday I finally manged to find time to do the job. I found that one of my friend have garage and he was willing to help me. If I knew how difficult the job will be I would never do it myself.
Centrestand has to be removed in order to get to the front bolt of cushion lever. I order to release the spring I used heavy duty string and rear wheel. Rear wheel casting has a hole which I used for this. To install it back, same procedure.
Only straps are suitable for doing the job. Rear wheel also has to be removed in order to get space when installing shock different than stock. Also without rear wheel it is easy to raise swingarm during shock installation. To unbolt dog bones nuts 17mm socket is required for the nut and 14mm ring spanner is the only thing that will work. It was not possible to unbolt this by using 2x socket. Ring spanner had to be supported on the frame so I could apply massive force to the socket on my side and unbolt it. Same procedure for other bolts in cushion lever. Removing the bearings from cushion lever was almost impossible (I don't have bearing press) . I ended up destroing them completely to be able to remove them. For pressing out the bearings I tried to use the vice + 2x socket (size little smaller than bearing and other bigger to catch the coming out bearing) however it did not want to move at all, even after heating up the cushion lever. I ended up hammering out old ones. After cleaning of the cushion lever I heated it by heat gun and pressed in new bearings using socket of size little smaller than the bearing. (I have not touched dog bone bearings as they were fine and taking them out was to much hassle without proper tools). By the way, bearing where the bottom of the shock is mounted was completely disintegrated.
Shock installation was also a bit difficult, it went from the bottom but it had to be rotated few times to be able to put it in place. But this kind of problem will be only if you install shock with external reservoir which is piggyback like mine (Nitron R2 ADV). Top shock bushing had to be grinded a bit in order to fit it in place. With shock in place assembly of everything was quite straight forward but time consuming, obviously I greased all the exposed bearings and torqued all the nuts using torque wrench. By the way, putting rear wheel in was pain in the Donkey. Not enough hands 😂