These are K&L brand shims and are of great quality but the spacing of the shim's is .1 mm or .004 apart. The tolerance of the 1980 CB750C is only .003 so it is hard or impossible to adjust the clearance of the tappets. I ended up buying a Master kit where the shim spacing is .05 mm or .002".
Other wise they would get a 4 star rating.