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What is the difference between the AGV line of helmets: AGV K1 AGV K3 SV AGV K5 S AGV Veloce S How to choose a motorcycle helmet. I also tell you: what is a pinlock, what is the difference between Double-D and ratchet buckles, the differences between a simple visor and a racing visor Link to Bruno Rožkalns' motorcycle school: http://www.brunomoto.lv/ Links to helmet safety ratings: https://sharp.dft.gov.uk/helmets/?man... https://billyscrashhelmets.co.uk/cate... 0:00 - Introduction 1:35 - Where to watch helmet crash tests 2:00 - Why we only consider full-face helmets 3:33 - K1 5:00 - K3 SV 7:00 - Double-D or ratchet? 7:52 - K5 S 11:45 - Veloce S 12:05 - What's the difference between visors 14:45 - Tear-off system 15:45 - Why you shouldn't get used to riding with your visor slightly open 17:40 - Emergency release system 18:45 - End of part one Instagram: / quattordici Praise here: https://www.donationalerts.com/r/quat... #quattordici #agv #pistagpr