It’s in a 1930 Peugeot P50T oval boardtrack racer. Modern scale version of WW1 period Gnome&Rhone overhead valve 9 cylinder radial aircraft engine. Methanol premix fuel. Glowplug ignition. 100 cc, 7hp 7000rpm.
There are double d-cells in the fire extinguisher case giving 22,000mah for powering up the plugs
Found on https://www.facebook.com/BikeShedMotorcycleClub/photos/a.982441528446099.1073742635.312531012103824/982441921779393/?type=1
Radial engine video of Bo Hare
for great coverage of this bike, see http://www.dwrenched.com/2015/05/dwrenched_29.html?showComment=1433212592449#c4661055066840973789