Similar question, but mine isn't rust, it's this white scale. I think it's from bad gas sitting in there for long periods of time from previous owners, but it doesn't wipe off and I have a hard time getting a chisel in there. It is flakey enough that I have to change out fuel filters every couple weeks.
Ex-500.com - The home of the Kawasaki EX500 / Ninja 500R
A forum community dedicated to Kawasaki Ninja EX 500 sportbike owners and enthusiasts. Come join the discussion about modifications, cafe racers, racing, classifieds, troubleshooting, accessories, maintenance, and more!