For 2017-2019 Rebel 300/500, 92569 (48 mm) or 17252 (60 mm).
(I put 92569 on my 2017 Rebel 300)
For the 2020-2024 Rebel 300/500, 17283/39913 (48 mm) or 17284/39914 (60 mm).
article on 17252: https://www.hondarebel3forum.com/threads/daytona-velona-60-tachometer-kit-installation-instructions-with-pics.14151/
.
https://www.jpcycles.com/2017-honda-rebel-300-cmx300/tachometers
Below is Daytona Velona tach manual.
For the 2017 to 2019 Rebel 300/500, you need to raise the tank to get to the ECU connection for the tach install. The 2020-up years is easier – they connect to the green wire on a ignition coil. They take a different Daytona tacho kit and harness.
For the 2020-up models, the harness directly plugs into the ignition coil (green wire).
If you do not want to connect the tach to the ECU/coil, you can order an optional induction cable set ($8.41 USD) for determining the engine speed.
On back of tachometer, the pulse rate can be adjusted: 1P-1r/1P-2r/2P-1r/30P-1r …. “1P-2r” is the setting for Rebel 390 and 500. It works for both because the tach reads rpm from one cylinder. …. 1P-1r will show one half the rpm
Rebel500 