Lambretta cylinder base gasket with a thickness of 1,0 mm for the large engine blocks with 200-250 ccm displacement. Ideal to compensate for connecting rod lengths, differences in the heights of the engine sealing surfaces, twisted cylinders or to be able to experiment with the control times. The size of the overflow channels is dimensioned so that it corresponds to the standard overflows. Ideally, this should match the engine block and cylinder.