I'm double-posting here and PlanetKLX so you guys who monitor both please forgive me. What do you guys use to flush your cooling system? Again, the previous owner, not Brandon but the guy who bought the bike from Brandon and sold it to me, wasn't up to par on his maintenance and there's a bit of oxidation I need to get rid of. I'd heard to use vinegar but would rather hear it from you all. Thanks! Karl G.