Hello all, I'm doing a top end freshen up on my '85 XR600R motor. I've got everything under control, apart from what "top end" gaskets kit to purchase. The problem is the bike runs a +5mm piston & bore (102mm bore/660cc's), Aad i'm not sure if there is also a XL600R head on it or not. The reason i say this, is a common way to get the 102mm bore, was to use a XL600R barrel, and top end (100mm bore from memory), on the XR600R's bottom end (80mm stroke), then bore the steel sleeve to +2mm to give 102mm, and just under 660cc. So... my first question is, does anyone here know how to 100% identify if i have a XR or XL cylinder head? I can post pics, measure things, etc if need be. My second question is, the gasket kits for the XR600R's are for 1988+. Were there any changes to the bike in regards to the head gasket, valve cover gasket, etc? I know they went to a single carbie, so the inlet manifold gasket will be different, but apart from that, anything else? Probably a long shot, but thought i'd give it a shot. 8-[ Thanks.