A search is on for the rider, whom police wish to speak with.
He is described as Asian, medium build, with short dark hair and was riding a 2008-2010 Suzuki GXSR 600 motorcycle. He was wearing a black, white and red leather riding jacket, dark pants and white shoes.
Police say the incident between the two men, who are not believed to know one another, appears unprovoked.
No serious injuries were sustained and there was no damage to property, Det Sgt Milliken said.
"We believe, given the location of the incident, and the time of the incident, that there are a number of witnesses that may be able to come forward and provide us with information."
Anyone who witnessed either the incident or with further information is urged to contact Crime Stoppers on 1800 333 000.