A little bit of both. It shouldn't leak but it wont hurt if it does, BUT if you don't let the coolant get to low, it will blow the engine.
And for the dealer that said $250 to look at the valves they are retarded
Yamaha YFZ 450- Blingstar Front Bumper, Duncan Fat Boy 4, Kenda Klaw MXF, Kenda Klaw MXR tires, AC Racing Nerfs, AC Racing Grab Bar, Cam Mod, Uni Air Filter, PRM Skid Plate, Magic Racing E-Z pull Clutch Arm, Pro Design Case Saver.
Yamaha YZ250F-coming soon!