Universal speedometer speed sensor

thingiverse

This part converts speed from a rotating cable connected to a motorbike front wheel into a universal speedometer. A magnet must rotate in front of a hall sensor for the speedometer to work. Placing this sensor directly on the wheel isn't practical and can be hazardous, especially when attempting to use the brake disk as a mounting surface. I came up with the idea of using an existing mechanical cable found on older bikes, like my 94' Suzuki GS500. The flexible cable has a square profile (2.5mm) and a M12 threaded end. To create this adapter, several mechanical parts are required: bearings (625(ZZ), 608(ZZ)), M3 screws, small cylinder magnets (3x3mm), all of which can be sourced from Aliexpress. The magnets are inserted using pliers, while both disks are bonded together with cyanoacrylate adhesive. It's essential to note that the magnet direction is critical for some sensors and must be carefully aligned. Additionally, Loctite glue should be applied to the sensor thread to prevent vibrations from causing damage.