Globalti
Legendary Member
The horn button on the handlebar cluster of my motorbike went limp because the spring had broken. A new or even second-hand cluster was expensive and it seemed ridiculous to pay pounds for such a tiny part so I disassembled everything, took out the broken spring, which was a tiny conical copper coil not unlike the spring on a bicycle QR but smaller and flatter. Making a crude replacement out of coiled up copper wire wasn't hard but it was too malleable so I heated it in a gas flame then quenched it in water, making it stiff and springy. Refitted everything and it worked impeccably until I sold the bike.