Batavus Starflite Chain "play" and Carb Jetting (1 reply)

Hoping someone here might be able to help me find some info on adjusting the jetting on my 18mm Mikuni carb. Im trying to get some more power off the get go and was told with new reeds i could adjust the jetting to do so. Anyone have any suggestions/ knowledge of this? Also does anyone know what the correct amount of play should be in my chain? I have a 1978 Batavus Starflite.

Thanks,
Toly