Your boots needs to be broken in really well before your get comfortable with them. Just like a baseball glove
I like to walk around in mine (when they're brand new) when i'm working on my quad. Shortens the break-in process
Tbone is dead on. You got to break them in. Walking around in them and bending them back and forth helps alot. Also, spray some type of light lube like WD-40 all over the boot. I thought it sounded funny too, but all the racers I know do this to their new boots and they swear it helps break them in faster. I had the same problem last year with my new Fly Racing boots. Man were they stiff. I'm on my second year racing mx with them and I don't even notice them anymore.
Adjust your shifter and brake pedal. I wear a size 13 boot and struggle if it's not allowing my foot to shift up. I've had my boots a few years, and they are still stiff. Be patient with them.
Boots quality is basically what you pay for them, don't skimp on protective gear. Try some gaerne sg10's, they are pricey but have heard they fit/feel awesome.
I feel your pain. I wear a size 14 boot. I have to kick my shifter up at a really high angle to get my big freaking foot under it. LOL.
I had the same problem as my feet are size 12 and being 6'6" doesn't help either.....That's why I was glad to get a hold of a couple of Denton shifters....They are so adjustable they will work for any size foot....
That's a good call on the adjustable shifter. ESR makes their shifter adjustable now as well to accomadate for different size boots.
Like Danhung said, there are several boot makers out now that actually have a "pivot" built into the boot. They are so flexible, they require no break in time. But they are dang expensive. Gaerne and Fox both make a set of these type so far.