Early investigations indicate a Harley Davidson overtook a vehicle on Middle Road in Greenbank, south of Brisbane, on Thursday evening when it struck the e-bike travelling in the opposite direction, according to police.
The e-bike did not have headlights on at the time, police believe.
The teen boy and girl e-bike riders were declared dead at the scene, while the male motorbike rider was taken to Princess Alexandra Hospital in a serious but stable condition.
Police are investigating the circumstances of the crash and appealing for witnesses or motorists with footage to come forward.
The horror crash comes after a Queensland parliamentary inquiry recommended a ban on children under 16 riding compliant e-bikes and e-scooters.
The report noted Queensland Health reported more than 6300 e-mobility related emergency department presentations in the year to March 2025 - a figure thought to underestimate the true number of incidents.
More than 200 cases involved major trauma and more than 60 required intensive care, mainly for head and facial injuries, it said.
Under proposed rules, riders would be limited to a maximum of 10km/h on footpaths and have to hold at least a learner's licence, with the exception of wheelchair and other accessibility device users.
Any device with a top speed above 25km/h would be defined as a motorbike, moped or other appropriate classification.
They could only be ridden on roads, and would have to be registered and covered by compulsory third-party insurance.
Queensland Transport Minister Brent Mickelberg said earlier in March that the Crisafulli government would not bury its head in the sand over the need to reform regulations.
"There are clearly changes needed when it comes to e-scooters," he said.
"We've received robust, comprehensive, and practical recommendations to deliver reform.
"Some of these recommendations may mean making tough decisions, but we need to make those decisions to keep Queenslanders safe."
A University of Melbourne study found one in three Australian e-scooter deaths reported in the media from the start of 2020 to mid-2025 were children.
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