Originally Posted by Kev

I would strip the motor & inspect to see why it is using oil, send the head, cylinder & piston to a machine shop & let them measure them up according to the Yamaha spec's, you can re-use the head bolts.

I would fit this kit http://www.ebay.com.au/itm/Cylinder-Works-High-Comp-Cylinder-Kit-102mm-11-1-1-Yamaha-Raptor-700-06-12-/321005616688?pt=Motorcycles_Parts_Accessories&hash =item4abd6cfe30machine the skirt of the cylinder to fit the XT's crank case & slot the 2 X 6mm bolt holes on the cylinder & it will fit straight on the XT.