KTM F8103S4 Owner's Manual page 38

8 PREPARING FOR USE
If the charged lithium-ion battery does not turn, or only weakly
turns over the electric starter when temperatures are below 15 °C
(60 °F), then the battery is not faulty, but needs to be warmed up
internally to increase its starting power (current output).
The starting power increases as the battery warms up.
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