I want to redirect that last comment a bit.
My experience has been that a modded stock E50 (pipe, carb, mild porting) can happily run WOT all day and bomb hills without any danger.
My first maxi ran 35 on flat ground and mid to upper 40’s bombing hills. I had a Boss pipe too, which theoretically would let me rev into more dangerous territory than that circuit should.
I read posts, Jennings, asked some questions. Ride, listen, feel, then spend some time thinking about it. Eventually, you will have a more organic understanding of what is going on. You don’t have to be a scientist or engineer to go a little faster and not blow up.
Taking your top end off a lot is good too when you’re getting it all figured out. See where the heat is going. Maybe catch that ring blow-by early and correct it before something gets hot and stuck.
Like PD said, make sure there are no air leaks anywhere. No other tuning makes sense unless you are 100% positive the engine isn’t breathing through a hole it shouldn’t.
A tiny leak that barely causes a problem at idle may get more action when running full speed and pressure changes in the system are max. So, maybe you think the bing carb and intake are sealed well enough. Best to overkill and put an o-ring in there. Press them together tight and lock down the carb clamp. After that, only pull the carb via the intake nuts and leave those two clamped together while changing jets and needle settings. New intake gasket after that.