A coroner has recommended that the Government consider issuing warrants of fitness for quad bikes.
On Monday Whangarei coroner Brandt Shortland released his findings into five workplace quad bike deaths.
The inquests concern Carlos Mendoza, John McInnes and Suzanne Ferguson, who died after quad bike accidents in 2010, and Willem Van Der Pasch and John McInnes who died in 2011.
The coroner recommends that a helmet be used at all times and a taskforce be established to research rollover quad protection devices.
He also suggests quad bikes have warrants of fitness and be fitted with alarms that signal when the rider is in danger of tipping.
The Ministry of Business, Innovation and Employment says it supports the intent of the coroner's recommendations.
Health and safety manager Ona de Rooy says social change is needed to ensure agriculture workers understand the risks of using quad bikes.