Hi, I bought a 1996 scrambler 400 4x4 for, well a steal, only thing i had to do was clean the carb. Well, I ended up starting it and finding out it needed a head gasket. So I replaced that and rode it the whole next day. No leaks, ran perfect, like it should, well sort of like it should (i got beat by a piped 300ex). The next night me and another guy were taking turns doing wheelies on it in a field. When he came back it had a bit of antifreeze on the right side exhaust cover, right about where your knees would hit the tank. PLus I could hear a little hissing noise i thought and i noticed some antifreeze on the left side frame and plastics and around the overflow. I took the plastics off tonight, retorqued the head bolts and checked everything that I could to find a leak and couldnt find anything. Do you guys have any suggestions? I am beginning to think that since we were doing wheelies, the antifreeze came straight fromt eh overflow and hit the underside of the gas tank and went everywhere. It was dark so I couldnt realy tell. And now that its dried up I cant find anything. What do you all think.

 

i think you should've been able to beat the 300ex.
keep an eye on the coolant,check radiator cap.

 

if it was over filled it might have expanded enough to com out the tank. make sure it isn't past the cold line in the tank much when it is cold so it has room to expand. then if it's comng out it is overheating. just a thought.

 

Just answered another post along the same line as yours about was the 10 mm bleed screw opened at the top of the head and purged of air and a steady stream of coolant after the head gasket was replaced? If not, can cause head gaskets to blow along with over heating damage. OPT