Hi and welcome to the forum
There is a very good writeup on helmets and how to select one in this thread http://www.kawasakimotorcycle.org/forum/showthread.php?t=2175. Trying on the helmets is always best, though. What you're probably encountering is manufacturer size variations. My husband found those too when trying on helmets. An XL in one manufacturer is not always an XL in another. A few manufacturers have taken to making different shapes of helmet as well, since not everyone's head is the stereotypical "round" shape. Another thing that might help is to see if the particular manufacturer of the helmet you like has replaceable padding for the helmet. I know with mine, I can order new interior padding in different thicknesses.
I can't help with the Gmax type helmets (I have a streetbike, so I'm not to up on dirt bike helmets.) I have an Arai helmet, so you may want to look at their VX and MXC series helmets to see if they are to your liking.
Hope this helps!
Happy and safe riding!
Angela
I can't help with the Gmax type helmets (I have a streetbike, so I'm not to up on dirt bike helmets.) I have an Arai helmet, so you may want to look at their VX and MXC series helmets to see if they are to your liking.
Hope this helps!
Happy and safe riding!
Angela