HI James, I think this is a 224cc Single cylinder shaft drive 1909 FN motorcycle built by the Belgian Arms company:
http://en.wikipedia.org/wiki/Fabrique_Nationale_de_Herstal
2.5 HP motor, 2 speed gear and cone clutch
http://earlymotor.com/leon/bikes/fn/html/fnsingles.htm
1909 FN 2 1/2 Lightweight 250cc
Cheers
"Ash nazg durbatulûk, ash nazggimbatul, ash nazg thrakatulûk, agh burzum-ishi krimpatul"
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IIRC, someone's good at these.
"Sometimes things that are not true are included in Wikipedia. While at first glance that may appear like a very great problem for Wikipedia, in reality is it not. In fact, it's a good thing." - Wikipedia.