The lads - one aged in his 50s and the opposite in his 70s - departed from Koorda early on Sunday morning together with 10 different plane as "a part of a membership occasion", police mentioned.
By 3.45pm, when the duo did not arrive at Jandakot Airport, the alarm was raised.
A challenger jet deployed by the Australian Maritime Security Authority's Joint Rescue Coordination Centre (JRCC) was deployed to seek for the Robinson 22 helicopter.
A short while later, the wreckage was discovered at Cowcowing Lakes in Booralaming, south-west of Koorda.
Police imagine two males have been the one individuals onboard the helicopter on the time.
An investigation has been opened relating to the crash.
Officers encourage anybody with data in regards to the crash, or who noticed the chopper on the time main as much as the occasion, to name Crime Stoppers.