Radiator over-flowing?

[black450r]

I just got back from my race and realized that i had no coolant left. Before i raced i checked it and it was between the lower and high level mark. i dont see any leaks anywheres. i am pretty sure it is coming out of the overflow line. If u have any suggetestions on what could be that promblem please let me know thanks.

[450Racer]

the same thing happened to me at practice. i was practicing my holeshots. i was revving it out through all the gears, it was about 90 degrees out and i just let it sit, getting no air flow when i got back and did it again. mine was pouring anti-freeze all out my overflow house on my skidplate. i'm suprised you lost that much fluid, it shouldnt' have done that unless it was REALLY hot. mine just did a little and i had to fill it about 1/4 back up.