I'm with Jason as well
Rebuild the front forks, New OEM seals and wipers, good fork oil, if the springs are sagging a bit some plastic spacers to take up some slack. I personally would replace rear axle, front wheel and swingarm bearings and seals with new. That way you absolutely know you are in good shape for years to come. Tank is cosmetic, It won't make it run better or last longer and can be replaced or fixed when you decide to spruce it up.
While you have it apart for bearings is a perfect time to inspect /replace / lube all the other wear spots the previous owners may have neglected, chains,sprockets,brake pads, caliper pins etc.etc.
You'll know the machine is capable and up to whatever you put it thru and not have to worry about that "one item" you didn't look at.
Enjoy the machine and the doghouse.
Ross..
My Rides
1985 250R original (Garage Queen)
-under restoration
1985 250R black and blue full rebuild ( Daily Rider)
-Paul Turner pipe
-+2" Westcoast
1985 Red and White Tecat-EH Sold
1985 Green Tecate Sold
My Wife's Ride
-2003 Suzuki LTZ 400 Showroom fresh and completely stock
My Kids Ride
-2004 Yamaha Blaster, Completely Stock
-2006 Yamaha Blaster, Completely Stock