Looks as though it would add around 10 kg in weight! Are you sure it's not been nicked off some statue somewhere of some bloke with the initials "SV"???

I'd buy it and stick it on somebody's Harley D. for a laugh and then run like buggery!!! :P

No reason to assume it won't work perfectly, SV rear discs have a very easy time of it. But no matter what, it will look rubbish...