I took off the cylinder on my 84' kdx 80 the other day and was surprised to see how rough the outside edges are on the openings of the intake and on the outer edges of the exhaust ports inside the cylinder. I cleaned off all the carbon and am surprised to see how weird it looks. These don't seemed damaged but the openings looks like Kawasaki etch-a-sketched the openings. Is this normal and could I use a dremel tool to slightly even them out? Any advice is greatly appreciated.