One of the best pieces of advice I got from my friend Bill Boyce, factory Yamaha mechanic of ~30+ years (he works at Riva Yamaha in Pompano Beach, FL, and has worked on plenty of hot-rodded VMaxes since they were initially released), was to replace my 20-year-old gas tank w/a new one when I was resurrecting my bike after an extended period of non-use. He said that for the cost of a new tank, it will save you more than it costs in frustration and labor for dealing w/the flaking tank innards, clogging your carbs, having to remove & clean them, maybe being stranded on the road, etc. It sounded like good advice, I took it and bought a new tank from ronayresmotorsports. It cost me <$200 about a year ago, and I haven't had to deal w/the time, frustration, and man-hours involved in trying to keep a rusty, deteriorated tank in-service. They are more $ now, but I haven't had to clean my carbs except when I was having them gone-thru to be able to return the bike to the road. I cut the neck off my old tank and am planning to use a gas-rated rubber hose to retain my stock locking gas cap on-top of the rubber extension from my stock filler neck w/my Corbin seat.
POR-15 is good stuff, Eastwood has good products, not cheap, but worth the $ invested for the results.
That does make since, just got off the phone with the local dealer $316 same as bike bandit and still available