Hey Art, can't you just wind up your idle screw when it's cold? The rattle is probably your cam chain and your clutch, synch your carbs and that will (almost) go away.
Well I'm particularly pissed today, I took my (beautiful) Yoshimura Suzuki GS1000 for a ride, and as the fuel gauge doesn't work (and there's no reserve position on the petcock) I swung by the gas station to fill up.
It only took a gallon of gas so that was good, until I noticed a "bulge" in the nice new two pack paint, about the size of a quarter? Fcuk!
The weird thing is, the "bulge" is actually on top of the tank, not down the bottom where you'd assume a hole could form and allow gas to weep into the paint?
Oh well, I'll try to (carefully) clean it out and seal the tank with some POR 15, I've drained all the gas out and with the warmer weather, I'm hoping the residual gas in the tank (and in the bulge) will dry out and I won't do any more damage while I'm trying to fix it.
Oh, and apart from that, it's going great, 140+ MPH with more on tap, woohoo! Cheers, Terry.