Identifying an engine

I bought a 125 engine off ebay a few years ago for a project and now I come to insure it my insurer want to know what make of engine it is.
I cant contact the guy i bought it off and can't find any receipt etc...

The only identifying mark (there is no engine number or anything) is stamped near the spark plug, does anyone recognise it?

IMG_0520 by mightysi85, on Flickr

If it helps here are some general photo's of the engine


IMG_0521 by mightysi85, on Flickr


IMG_0522 by mightysi85, on Flickr


IMG_0529 by mightysi85, on Flickr


IMG_0530 by mightysi85, on Flickr

It's a member of the Xplorer / ... family.
Sold in different names and makes, but are all the same.

Another example: Lifan
http://www.ebay.co.uk/itm/LIFAN-140cc-M ... 3340wt_905

Thanks Waynus, is there anything you don't know...

Yes, a lot.
But I tend to avoid all the hard questions.
And yet another one: Apollo engine