Two pedals in one

[trikebuilder57 (Al Frick)]

This has come up before, Chris has a video of a linkage for this.

Questions about installing woodgas on a carbureted truck with a manual transmission

I respectfully disagree. Having two throttles won’t really make anything harder, you’ll simply have to pick one or the other - not both at once. Then it’s no different than driving with a single throttle. If you needed to use both throttles, and the clutch (or brake) all at once, there are other options such as hand throttles or Max’s linkage (below). Or simply mount them close together and hit them with the same foot. I’ve driven plenty with dual throttles and seldom used both at the same ti…