I've been thinking about buying a motorcycle. I'm an engineer, so I love spreadsheets. One of my spreadsheets adds up the cost of gear I'd have to buy if I bought a motorcycle.
I'm not sure if I should add the cost of a helmet to this spreadsheet. I already have two very nice SA helmets - an SA00 Simpson Super Bandit and an SA05 HJC Si-12. Could I use these helmets on a motorcycle legally - and more importantly - safely?