It is not wise to adjust the engine to a number of turns.
Many things like the kind of fuel, weather, exhaust etc have influence on it.
I think it is wise to start rich and slowly lean out until the engine performs good, has a nice sound, a nice smoketail and a good temperature.
On Youtube there are a lot of movies about adjusting engines, learn them...
Speed is only fiction but a 130+km/h MRS4 is for real.