Officers were called to Hardy Mill Road at around 4.30pm to reports the rider had fallen from his bike.
The 25-year-old man was treated at the scene and was taken to hospital with head and face injuries that are potentially life-threatening.
Anyone with information about this incident should contact police on 0161 856 4741 quoting log 2401 of 08/04/2023.
Information can also be reported online or by using the LiveChat function at www.gmp.police.uk. If you can’t report online, call 101 or Crimestoppers anonymously on 0800 555 111.
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