You're an idiot.
The Hydrogen moped would operate better than the petroleum moped.
That is the comparison, not a bicycle to a motorized bike.
I propose no 'rig'. It takes very little effort to make a petro fuel engine run on a gas. I could choose propane, but I am looking toward a new direction.
As far as my many methods for slowly gathering the Hydrogen goes, that is merely supplemental. I would actually have to get Hydrogen or Propane by the bottle. That was already the plan. The supplemental methods are part of the fun.
You have serious problems with your math if you fail to first conceptualize well. I propose that your 'rig' is old and worn out, and the horse blinders you have on are superglued in place.