ACE-TA3 Sensor. Save yourself the trouble and mount this sensor combined with an Acewell Counter.

Honda
Honda XL500 81'

Honda XL600R PD03 82' - 87'
Honda XL600V PD06 87' - 99'
Honda CB 600 Hornet
Honda FMX 650

Suzuki

Suzuki GSX600F
Suzuki GSX750F 89' - 97'