Hi guys, 
 
	My brother sold me this motorbike years ago for £80. It's in boxes, I've never seen it together. I don't really know what it is, I'm a car guy, I've never worked on bikes before. When he sold it to me he said he thought it was a dt70? I've Googled a bit and can't find much on that... Can anybody shed any light? It's water-cooled... 
 
	The cylinder and piston are scored so it needs a rebore or a replacement, what's best? 
 
	Cheers guys