We all go through it, when I was a young bloke I bought an XS2 650 Yamaha, bored it stuck in 650 Benelli pistons and still got my ar$e kicked by a Honda 4.
Now I've gone full circle, up to 2.3 rocket and now back to a 650 Interceptor and loving it.
Did something similar. I was once the owner of a 1200 bandit, that i fitted with a 1100gsxr head and carbs for good measure. The chassis was already not up to the torque the oem engine could bear, so now i could feel it twist proportionnally to the throttle i gave it.
Then the engine was destroyed by the mechanic i paid to set valve clearance, and he happened to have one for sale, only this one had been fitted with 1340cc upgrade. So it went int, for cheap.
Eventually i grew tired of destroying tyres and spending more money on gas than on a car. I also felt like i was going to die on every corner entry, exit and straight line, so sold the engine, got an oem one, sold the bike, and got a twin 650 that i kept for around 10 years.
And then sold that one for the interceptor. Which is a great bike