The crash involved 37 riders and was caused by over-acceleration and over-correction, with post-mortems confirming injuries were unsurvivable, the inquest found.
On May 5, Owen Jenner, 21, and Shane Richardson, 29, died in a multi-rider crash at Oulton Park race track, Little Budworth, during the Quattro Group British Supersport Championship.
Investigators found Richardson had over-accelerated then over-corrected about 300 metres from the start, while medical history showed motion sickness and blurred vision but no direct health cause was found.
Some 37 competitors lined up for the race and eleven riders fell at Old Hall corner, forcing abandonment; the track allows a maximum permitted grid of 40 with three riders per row set nine metres apart.
Cheshire coroner Jacqueline Devonish recorded accidental deaths and said Motor Sport Vision Racing followed all required procedures, including inspections and licences, while PC Andrew Balmforth confirmed no track issues.
Families and colleagues mourned Owen Jenner, a rising star who began riding at six and won three British titles, and Shane Richardson, who raced internationally from age four and tested Triumph bikes.