Police are appealing for witnesses after a fail-to-stop collision on Ridding Rise, Huddersfield.
Officers were called at 18.30 on Wednesday 5 July to reports a black coloured e-bike had been in collision with a 14-year-old male pedestrian.
The e-bike failed to stop at the scene.
The 14-year-old was taken to hospital in a serious but stable condition.
The e-bike left the scene in the direction of Riddings Road.
Anyone who witnesses the incident or who saw the e-bike prior to the collision is asked to contact police via 101 or use the Live Chat facility at www.westyorkshire.police.uk/contactus quoting log 1551 of 5 July