I can tell by the tires I have on that BSA that I was not moto crossing, but trials riding, you ever try that Lupo ?  you go like heck until you come to a taped off section could be 1,2,3 hundred yards,now through those sections you can go as slow as you like , but there are refs marking off points as you go threw, if you dab a foot on the ground you lose one point,put two feet down at the same time lose 2 points (each time you do it) if you stop and have to get off and push or you fall off,you lose 5 points.
These sections are all over the place ,but you start with a 100 points ,most points at the end wins , Best I did was 2nd.
Does that sound like fun ? these events are usually held in the winter,and iver you are crossing a stream and you drop it it takes the rest of the day to thaw out.