Pulled out my wives quad she got from her grandparents and got it running after sitting for close to a decade. 400 miles on it all original everything. Purchased at @CowboyPless families old dealership in Hamilton OH.
Instead of radio comms idea for supercross warnings they could have a small, high pitched alarm mounted inside their helmet to warn riders instead. Iโm sure race director could use the track segments to set the riders alarm off in or before section of downed rider. @pulpmx