Police Stop Illegally Modified Bikes in Point Cook

Westgate Highway Patrol has intercepted two young riders operating illegally modified mountain bikes on public roads in Point Cook, issuing warnings to both after finding the vehicles had been converted to motorised power without approval.

One bike had been fitted with an electric motor, while the other was running a combustion engine — modifications that take the vehicles outside the legal definition of a bicycle under Victorian road rules. Under Victoria’s road rules, a pedal bike converted to run on a petrol motor is illegal in most cases. If the engine is the main source of power and its output exceeds 200 watts, the vehicle is no longer classified as a bicycle but as a motorbike — requiring registration, a motorcycle licence, and an approved motorcycle helmet. 

Similarly, electric bike modifications that allow the motor to continue providing power beyond 25 km/h, or that exceed 250 watts of continuous rated power, render the bike illegal for use on public roads and shared paths. 

On this occasion, police chose to issue warnings rather than fines, with officers noting that parents were relieved to avoid penalties that could have exceeded $2,000.

Westgate Highway Patrol said the safety risk — not the mechanical ingenuity — was the concern. “Modified bicycles can reach speeds and operate in ways they were never designed for, increasing the risk of serious injury to riders and other road users,” the unit stated.

The patrol issued a direct message to families in Point Cook and across Melbourne’s western suburbs: “Parents, guardians and friends — please keep an eye on the vehicles young people are riding and ensure they understand the road rules before heading out.”

Police also warned that riders who attempt to evade officers face escalating consequences, including significant fines, vehicle impoundment, or crushing.

“We would much rather have a conversation today than deliver bad news tomorrow,” the patrol said.