Haha, probably we want a hinge on the joint between the gas pedal and the curved pin thing it pushes down? And move the pedal back or forward? Or yeah, I love to be super ignorant of the classical Simple Machines and try to work out mechanics like this.

I’ve actually had some success with guess-prototyping mechanical contraptions in the physics-sandbox game Besiege: https://www.spiderlinggames.com/

I can also emphatically recommend just getting a Husaberg 550, 570, or 650 %D