Get under the wishbone where the 2 tubes meet the large tube (under the tank). You can gusset underneath that and go over the areas with your mig welder. While your welding, weld a 1/2" thick washer on the swingarm bolt.
Make a gusset under the left vertical riser where the motor mount is or wrap it.
It's time I try the tapa talk because I'd like to post some pics for you.....