Yeah - if you allow any kind of motors as a standard part of the ruleset, you've basically got 'lightweight motorcycle racing'. You can get something like this

Yeah - if you allow any kind of motors as a standard part of the ruleset, you've basically got 'lightweight motorcycle racing'. You can get something like this already with trial riding or motocross races, where having a lightweight motorcycle is essential for handling in rough terrain and to take falls and jumps without breaking the suspension.