R&G Engine Case / Clutch CoversEngine case cover Even at low speeds, motorcycles landing on engine cases can end up seriously damaged or even written off. If engine casings are holed and modern magnesium cases are particularly venerable, oil from the engine can spill on the road or track and create more problems. R&G Engine case covers are made from tough and durable 4mm polypropylene and bolt onto the original casing without having to drain fluids. Ultra light weight and low