Yes you can remove the motor mount assembly without separating motor from the frame. I thought I was going to have to remove the header pipe but I persevered at the risk of damage to the O2 sensor.
I just replaced the coolant 6 mos. ago and I didn't want to mess with that and the rest of the prep work to separate the motor.
You need snap ring pliers and a 32mm X 0.03937=1.259(1 1/4) socket. I used 1 1/4. Nothing special about the rest of the tools.
Step 1) Remove both lower foot rest plastic. 2) Remove silent block snap ring. 3) loosen 32mm nut. 4) Remove the nuts on the 3 long bolts and the small nut/bolt near the SB(silent block) and the spring. 5) Pry under the tire to help slide the 3 long bolts out. 6) Free the throttle cable by removing the clamp to the rear of the SB. The SB housing has a throttle cable retainer on the inside (hard to see).
Now you have to pull down on the suspension bracket to remove the 22mm adjustment screw. This will give you more room to solve the puzzle of sliding off the SB housing. Be very careful wiggling the bracket out. The separation in the bracket needs to slide over the pipe rear of the O2 sensor. DO NOT TRY TO FORCE IT.
One of my motor mount mini silent blocks has failed. I hope I can replace it without pulling the motor.
Having a machine shop at my disposal, I should be able to fabricate a silent block removal tool(not an impact wrench). I figure the money saved by not having to buy a new SB assembly will allow me to replace all the moving parts in the suspension bracket.
597317 bush $2.60 X 4
597374 roller cage $3.08 X 4
CM067809 spacer $6.81 X 1
CM067807 spacer $6.81 X 1
599250 buffer $6.10 X 1
273460 bush $2.10 X 2
272750 silent block $22.70 X 1
486081 motor mount SB $6.61 X 1
Now all I need is to find the special stringy grease. I'm hoping AF1 might have some in a small qty to reduce waste.
1 1/2 hr to remove, maybe 2 hrs to replace it and who knows how long logistics will take.