Alright, here's an interesting problem...
I've started a new game with FWE. Several hours into it already (first chapter of the wasteland survival guide completed) and I wanted to go back to minefield to collect some of the things I left there via the motorcycle that FWE adds to the game. I made my way to the store and bought what was needed to make the motorcycle go... fuel. I then trekked back to megaton only to find the motorcycle had disappeared. It was like someone stuffed it in their pocket. Just... gone.
I did a quest hoping it would reappear... nope.
I went back to the dealership and had them find it and deliver it out front. They said they did it but no motorcycle out front.
I then bought the gps so I could find it myself... and the gps says it is out front. I follow the compass marker to the exact spot it is supposed to be in... and it's not there.
I found out the prid of the motorcycle (1e001551 if anyone is interested) then tried the console commands of "player.moveto 1e001551" and "moveto player". Player move to will set me next to where the map and quest marker thinks the motorcycle should be... but there's nothing there. I can't click on it... I've tried to tfc to see if it is underground, not there...

Any one have any other ideas on how to help me here... I'm really enjoying this playthrough and I don't want to be derailed.

Sounds like a corrupt save or something similar.

You could try a clean save via disable/enable the option to see if it reappears (save, disable, save new slot, enable, reload newest save).