Air compressor is the way to go. I'm an accessory junkie - so I change grips every time someone comes out with a new style.
I've had Arai, Suomy, Bell, and (3) Shoei's. If you've got a "round" dome like me - Shoei is the best way to go.
1 more interested in the back rest. I've mocked up a couple in the garage - looked like *!#*!.
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