Honda CRF125F 2021 Owner's Manual page 56

Starting Procedure
This motorcycle has a fuel-injected engine.
Follow the procedure indicated below.
Any Air Temperature
1. Using the start button
With the throttle completely closed,
press the start button.
Using the kickstarter
Lightly depress the kickstarter until
resistance is felt.
Then let the kickstarter return to the top
of its stroke.
With the throttle completely closed,
operate the kickstarter starting from the
top of the stroke, kick through to the
bottom with a rapid, continuous motion.
Allowing the kickstarter to snap back freely
against the pedal stop can damage the
engine case.
46
2. If you cannot start the engine, open the
throttle slightly (about 3 mm (0.1 in),
without freeplay).
about 3 mm (0.1 in),
without freeplay