Here is a very helpful item if you are working on, restoring, riding or racing a Yamaha DT400 from 1977 1978 and 1979. Models D, E and F. This is a complete top and bottom-end engine gasket set. Top quality aftermarket item. Item will ship sealed in the package, we just opened up an extra to take the photo.  This set includes the important and expensive copper cylinder head gasket and exhaust gasket, engine case cover gasket, and cylinder base gasket and more!  Also the correct later style intake gasket. You get everything seen in the photo to help your engine keep on revving!  Everything you need to get your bike running top-notch again.  That is it!