[Water Warrior 2]

Hi RedLine. Welcome to the forum. ebay is a good source but also check out the section here for parts for sale. A stock exhaust is best in my opinion. A side cover can be painted if need be.
In the mean time go over the bike for loose fasteners and whatnot. Lube anything that moves and use contact cleaner on all the switch gear. Don't forget the sidestand switch which lives in a dirty world. Get at it from the righthand side with the stand down.
Check the air filter and a good idea is installing an inline gas filter between the fuel valve and carb.