THAT is the kind of stuff that belongs in the BMX Museum! I'll write you when I get a chance. It might be a really cool thing if I can track down Gilbert now and interview him for you. He also did the original PK Ripper for SE Racing. Do you remember Race, Inc.? That was Gilbert. By the way, did I tell you that the guy ran GT's in house fabrication for the last ten years (he recently retired) was none other than Gilbert Axt. I am also teaching welding at a local community college. I am tinkering around with the idea of starting to make my own frames, kind of on a 'one-off' basis. The information might also come in handy for deciphering other makes because the factories in Taiwan make bikes for a lot of different companies. Before I left, I was writing a specification to standardize all of the serial numbers because GT was starting to send most of its US production to other US fabrication shops. The model and year of production was also coded by a letter, so you won't be able to spot a two digit month and two digit year. There might also be a second letter digit specifying the factory that assembled the bike, if applicable. There were at least four companies in Taiwan that made the GT lines:, and included) The first digit would be a letter designating the factory that made the frame. Just flip that bike over and take a peek! The serial number will be engraved underneath the bottom bracket shell on the frame. The motorcycle’s serial number takes up the last eight places in the VIN number.

Motobecane serial number decoder