Uhhh , I hate to be OBTUSE , but what dis THANG is ??
The last photo shows the enigmatic THANG on it's side , and without a sense of scale , I 'spose it's a fuel tank . Yeah , a fuel tank . See the chrome filler cap ?

Nice work , really .

2005 Model . Two Fast Eddy stickers , a bell and a clock . She's Lola . She tinkles and keeps time . http://s649.photobucket.com/albums/uu211/britbike05/