Any knowledge on Derbi GPR50?

[pscook]

I am looking at a Derbi GPR 50. Fair enough price, but I can't find anything of note on the web. It's a 1999 model with an (alleged) 80 top end. Anyone have experience or knowledge of this bike?

Info I am looking for:
Parts source (US or UK, I"m not choosy if they can help)
Service Manual (I think I have one, but any other leads are appreciated)
Engine model or Crossover (is it a Piaggio, Aprilia, engine?)
Hop up parts (duh)
Brake pads
Cables and hoses
Fork seals

The basics, really.

Here's the bike as it sits right now. Complete nutter to ride, compared to, well, everything else in the world (for us Yanks, that is). Start from the line at (minimum) 8,000 RPM. Rev until 11,000. Shift. Repeat 5 times. You are now doing about 40 MPH. Nuts.





Fun statistic of note: It has the ubiquitous "suicide kickstand." Just like the gassers...