I think this is definitely of interest because this forum informally embraces the non-folding minibike...
Ok so here's what I know about F1 BMX. Definitely not a kids bikes - F1 BMX series was a short-lived series in 1988 for fast and loose dirt racing on the flat with geared frames and pursuit geometry.
I love these frames and they're pretty rare - there was another like this on the
Fixed Gear Gallery a couple of years ago that had had the fixie treatment;
Will's Fixed Gear Schwinn Qualifier
Only a few manufacturers made frames; Diamondback F1, Schwinn Qualifier, Haro Dart... Anyone know any others?
A Haro Dart
See also the the Mongoose Moosegoose also for larger sized BMX frames (very similar to the minibikes popular in Asia and the new non-folding Dahons)
Mongoose Moosegoose
I'm sure someone here turned an F1 into a nice tourer... [goes and looks]...
Yes -
here
There a fair few threads here if you search for 'moosegoose' 'f1' or 'minibike'
Also you can get replica frames made new:
Rockfish:
Lastly - don't do this: It's not big or clever. Look at the rake!