I think the main handling problem is the rear tyre profile.
it is too tall, so you get side wall flex when cornering
for a fast bike it is a very bad tyre size and, in my opinion, the most problem with the handling for this bike.
definitely check battery condition and also make sure you have a good charging system in the bike. also check positive and earth connections are secure .
I suggested a steering damper, but you didn't seem interested.
lots of sports bike have them for extreme speed riding which is what you're doing.
i installed one and it fixed any wabble in my bike.
thanks. they are a very toque engine and its super smooth and torque is all the way through the rev range.
it would be one of the best bikes all round I have ever ridden. I have owned over 50 bikes so far.