The set up may be considered half assed but not the motor. The motor may be a solid animal but due to chassis set up, driver and/or trans it could still leave some e/t on the table. Sometimes, the owner of the bike is content with that and built like that on purpose. Nothing wrong with that. You could say if it has drag cylinders like a cub, the bike needs an override. period. but many will disagree.
Same can be said for AV gas. Sometimes you may be something and get higher compression than intended and due to riding a lot, AV gas is cheaper than getting race fuel.