Bringing up a scooter from the lowlands???

A couple of visitors came up from California with a brand new Vespa and an Aprilla. I saw them cruise past the shop in the direction of downtown.
A while later, the Aprilla pulls in the lot, and the guy asks if there is a mechanic here who can help, and the new Vespa was broke down at the Safeway. Won't turn over, nothing... and even started to fail as his wife was riding it.
A day later, and after much thought, everyone came to the conclusion that the problem was this.
They left California with full tanks of gas from a much lower altitude, and after trailering the scoots up here, the pressure from the altitude climb forced gas to back up into places it shouldn't be. Vapor Lock? YES!
They've got the thing idling now, and everything should be fine. It was just a head scratcher at first being the thing is brand new.

So.. Anyone bringing scooters to high altitudes should open up that fuel tank a bit to allow for pressure to adjust. When you get here, close it up, and you'll be fine.