Police are looking for dashcam footage after the collision on Friday night on Rycote Lane.
A man has died in a crash just off the M40 near Thame.
The motorcyclist, who was in his thirties, was involved in a collision with a tipper truck on Rycote Lane on Friday night.
Police are looking for anyone with dashcam footage who might be able to help them.
At around 10pm, a white Volvo Tipper lorry and a blue Suzuki GSXR1000 motorcycle were involved in the collision on the A329 Rycote Lane.
Sergeant Joseph Clamp, of the Joint Operations Roads Policing Unit, based at Bicester Howes Lane police station, said:
“Our thoughts remain with the family of the motorcyclist at this immensely difficult time.
“We are appealing to anyone who may have witnessed what happened, or anyone who has a dash-cam and was in the local area to check the footage in case it may have captured something that could assist our investigation.
“Specifically, we are looking to hear from anyone who saw two motorcycles travelling along the A329 in the direction of Thame between 9pm and 10pm on Friday.
“To report any information, please call 101 or visit our website, quoting reference number 43220254121.
“Alternatively, for 100% anonymity, contact the independent charity, Crimestoppers, by calling 0800 555 111 or via its website.”

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