Thank you for the forum. Great stuff. I've joined 'cuz I came upon a very pretty '73 CB450 with a holed piston. no debris in oil. maybe the metal vaporized due to a very lean mixture of the maladjusted carb. I'm shipping it to Charlie's Place next week for a fresh top end a few other things. I've ordered rearsets from Slipstream, clip-ons from Airtech, and I've got Emgo reverse cone shorty megaphones that i will upsweep with a couple adapters. I'll need advice on appropriate alu fender blanks. I think aluminum rims would be appropriate as well. Be well!