There is no clutch or countershaft. It is direct drive from the engine crankshaft to the sprocket in the rear wheel. So if you want to push the bike onto the track for a photo shoot, you have to carry the bike with the back wheel off the ground, or slip the connector link off the chain and remove it. At least we had a clutch on our speedway bikes!
I've been over 100 mph with no brakes, and the most frightening part is having 6 other guys doing the same thing next to you! Good luck with the board racing, at least the track is clean. If you loose it on one of those corners, not only are you going 100mph plus, but you are airborne, 60 feet in the air and climbing!