"It was like it was tapu. It was a big thing to stand up and make a noise about it."
Making noise was the aim of the ride, Mr Harawira added.
"We're trying to make the biggest noise about suicide and get the message out that it's not okay to go that way."
He also hoped it would focus the minds of iwi and social agencies to improve co-ordination and stop people "slipping through the gaps." He urged people to write to newspapers, contact politicians, and speak to schools about suicide.
"We have to do everything in our power to stop this," he said.
The riders were led out of Kaikohe by Maori tourism and hapu leader Hone Mihaka, who said 547 New Zealanders, almost 200 of whom were from Northland, took their own lives last year.
"There's just not enough people talking about it," he said.
The ride would show Ngapuhi's, and Northland's, support for the rest of the country, he added.
The riders were accompanied by Far North police, Green MP David Clendon (on his Triumph) and Green Ribbon chairman Eru Whare, from Ngaruawahia. Mana Party leader Hone Harawira was to join the ride in Rotorua.