I cant wait to see this finished! MB5's are so well built, it should handle the power just fine. Only thing I would question are the brakes. FYI Yamaha RT180's are nearly identical motors towards the blaster 200's. You might be able to use some things from an RT180 on your build such as exhaust, kicker lever, and I think some countries saw enduro models of the RT180 that would have a stator that had lighting coils. Keep us posted i want to see what happens!
I have a set of DG pipes from a Banshee i believe, not sure if that would do anything for your bike but look into it and PM me if you want to give it a try.