Hey Pete, I am an arms length, tolerated part of a GoldWing group, my bike still has the original mufflers. It's about as quiet as their two wheeled Peterbilts. With it's 13.5" Progressive 440 shocks and Progressive Fork Springs and 10w fork oil it's good for a nice 400 mile ride. And at 51 miles per gallon it doesn't use much petrol and uses no oil. I use RevTech 25w60 oil and K&N filters. I just installed Hawk Brake Pads, they are totally silent and smooth.
I am getting a broken Saito 1.00 in a couple of days, I'll share the experience here as I fix it. There is no such thing as a hopeless engine.