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Motocross is a big sport?
Depends o what kind of helmet it is. If it's like the pro7 then it can probly adjust to a medium, but if it's another kind of helmet I don't know.
It depends. A new oneal helmet can be as low as 110 dollars, while a bell or agv can be upward of 500.
Prices are from around 40 bucks, to a couple of hunderd dollars.
On FC-Moto you can find most kinds of motocross helmets online, they offer a large variety of helmets including full face / open face helmets, Jet helmet, communication system and more.
most face masks fit the helmet, preferably the same size. e.g. if you have medium helmet then get a medium mask
AMA Motocross revenue for 2008 was reported to be 559 million.
Helmet books chest protector knee pads and neck brace
about as big as they always was
Bell helmets are very good, what I have worn for the last 30 years starting with the Moto 3 to my current Moto 7.
invest alot of money in a dh bike and buy a motocross helmet. develop an affinity for xxl clothes and then lose your sense of fear.