I'll be honest, I still don't quite... understand... this version of the build. I hate saying it, but it just feels like you're strapping an engine on the front of the Cycle Truck. It's a neat idea, don't get me wrong, but that first idea you had with the kiddie car made more sense to me. The body almost perfectly fit the frame, you had the big-and-little tire combo, and you could easily add the engine and some funky name or signage to the side of it. With just the engine, it feels like it's just sort of... tacked on. I'm sure you've got a clear vision for your bike and it's just not clicking with me because you're just mocking it up right now, but I still can't quite wrap my head around the new direction you're taking this build. Regardless, it's your bike to build the way you like, so if this is the way you want to build it, go for it and don't let the naysayers stop you.