The motorcycle had then accelerated between 108 and 162km per hour, distance studies showed.
Gorrie lost control along a gravel shoulder shortly after, heading back onto the road after about 100m when he crossed the centreline into the direct path of a Toyota Corolla being driven by Amysh Goyal.
Gorrie and Izumi suffered fatal injuries to the neck and chest and both Goyal and his wife were taken to hospital for their injuries.
Coroner Shortland described the scene as "absolute carnage all over the road".
A post-mortem revealed traces of diazepam and methamphetamine in Gorrie's system but there was no evidence to suggest that the levels were high enough to affect his driving.
Speed, and Gorrie's inexperience as a rider were found to be the main contributing factors in the crash.
"If it were not for the decision to accelerate away from the police detection both Mr Gorrie and Mr Izumi may well be alive today," Coroner Shortland said.
- nzherald.co.nz