i've had a 73 Z-90 for about 18 yrs. i was at a party and was asked to go get a bottle of Grenadine. when i got back, my buddy said he would either give me the money for the stuff or that harley in the corner. sight unseen i chose the Harley. later i realized it was a z-90. once i brought it home (in pieces) i realized it was missing the carb and a lens. well it sat in the garage under a tarp sice then. well, yesterday i took it out and gave it a once over. i need a top end gasket kit and a carb. plus the tank is rusty inside. question 1: is it worth having the tank cleaned or replacing it? the paint is pretty good for the year. question 2: are the carb epensive? the rest of the bike is pretty good and complete. about a year after i got it, someone offered me $400 for it. with the engine out of it. but i figured if i could get 4 bills for it in that condition, it must be worth more running. hmmmm..... any opinions?