Yamaha - Water Pump Repair Kit - 6E0-W0078-A5-00Yamaha Water Pump Repair Kit Cooling System 6E0 W0078 A5 00 Overview When it comes to keeping a Yamaha running cool, I always tell people not to cut corners on the water pump. By the time youre opening it up, it usually makes sense to replace everything instead of guessing which part might fail next. Ive seen guys swap just an impeller and end up right back in the shop a few trips later. A full repair kit like this gets the job done right the first