What size pod filter?
 

For the factory carb on a Magician (assume it's the same for the Hawk)

I know that I can just measure it, but the last time I tried that the pod I gat was too loose and I had to go down a millimeter to get a proper fit

What size has been successful for you?

Don't own a Magician or a HAWK... but the 43mm UNI fit both the "Keihin PZ30" and the "Mikuni VM26" carbs... do you have a similar sized carb?

42mm is what I up on all of my CG motors but my Uni is a 44mm and screws down just fine.

The carb is marked Sheng Wey PZ30