I see a few possible problems, I am sorry I forgot that you have an AC engine not a LC. This solutions I am talking about are made for a LC engine, I don't know will it fit your block but I think it should because blocks are the same for AC and LC.
Onother problem, you don't have engine mounted like runner 125/180 has.
Anyway I think you could use it anyway, so here's what to do.
This is original LC engine mount, I think you will understand from the pictures, bearings and plastic washers go instead of original rubber mounts.
You need four 10 x 30 x 9 bearings and plastic spacers like shown on this picture.
I don't have better pictures but I think you'll get the idea, you have to pull your rubber mount out and put the bearing in their place, and those plastic spacers are to reduce the vibrations.
Just to note that this is not my idea, pics taken from a german scooter forum (
http://1948.rapidforum.de/). I did the same thing and it rocks, no more engine wobble.
This cost me in total of around 8 euros with cheap indian bearings