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I recently discovered I broke the valve cam shaft in my 1995 King Quad (model LTF4WDXS). The break point was right next to the timing sprocket. Could someone help me w/ a few questions?

First, the place where the cam shaft broke has scored the seat where the shaft turns on both the top and bottom of the valve cover. To the point where it looks and feels rough. Can I use a very fine grinder to hone out some of the rough areas or will it likely oversize the housing and the shaft will wobble? OR is it repairable?

Second, if it is repairable, how do I time it? Can someone suggest the procedure or a resource to learn that procedure?

Thank you in advance for your help.

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