No the Biker Scout Helmet is not removable. You could customize it though to become removable.

I am at GenCon right, well not right now. I am at home checking out some packages that came in the mail and to get some stuff.
Anyways, here is my quick review of teh 12"
Luke - It is Jedi Luke. The third one now? There is a little peg on his back where you can turn it and his body moves back and forth. He also comes with the Handcuffs.
I give him a C - It is Jedi Luke. Nothing reallly new.
Ewoks 2-pack - I like the ewoks so these guys are a welcome item. Outstanding detail.
I give these guys an A.
Biker Scout - I am just glad they now have a single Biker Scout. I wish they packaged him in a series when the 12" Biker Scout with Bike came out.
I do not have my 12" Biker Scout with Bike handy to compair the two but I like him.
I give him an B.
Yoda- The best figure of the series. Amazing detail. Come with his Chair, Cane, Newcklace, Jedi Belt, Lightsaber, and Force Lightning. The detail of the figure is great!!! They give him molder capri shorts and his legs are sculpted. So it gives you a glimps of what the rest of Yoda looks like

The Robe is nice. This pose is great. Sit him down, stand him up, or give him his saber to bask some sith @$$.
I give this Yoda an A+ Simply the best Yoda figure ever.