Get a Loud Horn
Okay, it sounds a little strange, but we all know that modern bikes run horns that couldn’t out-dB a duck. That brrruuup! that sounds like a strangled frog does no-one any good and is useless. Around $20 gets you a horn to be proud of, loud enough to alert a mate just in front that you’re changing plan, to guide your mates to you in thick bush, and to warn traffic of your presence. It’s the cheapest and easiest form of communication in the bush.