We'll, I gave up on the CR250 and bought on to a new '99 YZ400F recently. When I first started the bike, I thought how nice it was to have a bike that will sit and idle on it's own. After a few practice starts and a few sessions of idling, it started to lose radiator fluid(boiling over)through the overflow (about 85 Degrees outside). My question is, is this normal, does this thing need alot of airflow through the rad's to keep cool? Or am I seeing a future problem coming to light. I take it out Saturday for my first real ride and would hate to have cooling problems. I'm bringing a quart of coolant to be safe. The bike is brand new, 1999. Caught a great deal here in Japan. 390,000 Yen, or $3900.00. I had to jump on it.