Trick 6061 aluminum case saver for all husky models 68-80, maybe more. Don't think a thrown or broken chain can't break that stock magnesium cover AND trash your cases and or ignition and cover. IT CAN. Especially on the 250, 360, 400 and 450's. Protect yourself with these new beefy case savers. I haven't intentionally slung my chain to test this out, but it has been on my mag 250 for many hours and will provide greater protection than the stock cover and is guaranteed not to pack up with mud. Lighter than the stock manhole cover and looks trick on the bike. Bolts on in minutes and has a radiused pocket that is hard to see in the pictures. Works on the pre 74 big case motors as well as the mag and post 75 models.