Police have seized "multiple" motorbikes from gang members who travelled to a tangi.
The tangi, for a Waikato-based gang member, was held at a marae in the town of Paeroa on Tuesday.
A contingent of gang members travelled there on Tuesday morning from across Waikato, Auckland and Bay of Plenty, Inspector Will Lougrin said in a statement.
At the same time, police set up checkpoints and conducted "high-visibility patrols", with support from the police Eagle helicopter.
"A number of motorbikes and vehicles were seized from gang members and infringements issued," Loughrin said.
Police's expectations had been made very clear, he said.
"We have zero tolerance for any anti-social, unlawful, or driving-related offending.
"Police will continue to take enforcement action where offending is identified.
"Everyone in the community has the right to be safe and feel safe."
Loughrin asked anyone who saw any unlawful behaviour to report it to police on 111 if it was happening or 105 after the fact.