Rear seta belt providess adjustment.

This is how the rear seat belt secures the loop. All adjustments are made by adjusting the back seat belt. If you wanted to get fancy, it wouldn't be too hard to make the shoulder harnesses adjustable as well. Mine adhere to the KISS principle.

I keep mine adjusted so that I can lean forward and change fuel tank selection, but tight enough so my torso will be restrained should I crash.

No actual testing is planned!!!!