Motorcycle engine recreation

Hello, I’ve been doing some bike engine recreations. Most of them got really close values to those from real life bikes. Look!

Suzuki Bandit 400cc

Honda CBX 1047cc

Suzuki GSX750 (1985)

Now im working on the BMW S1000RR… but i cant make it go higher than 152 hp without turbo… any ideas?

Your post is very good and i like it very much