Yesterday I rode a creek bed for 6 miles. It took 6 hours. First gear only stuff. I had the following problem that maybe someone can help me with. A week ago I rode another technical area and found myself stalling it alot(more than normal). It was very hard to start, which is unusual for this bike (1-2 kicks normally). So I changed the plug and cleaned the air filter hoping that would fix it. Cold the bike starts first kick everytime. Assuming I fixed it I started up this creek bed yesterday morning. I found the bike stalling alot again and extremely hard to start. I tried flushing it, hot start out, hot start in. The only thing consistent was letting it cool down. Then 1st kick it would start. At one point the bike actually spewed steam underneath the engine, filled the reservior with coolant, then after 5 minutes sucked the coolant back in the radiator or block. Some have told me the WR426 wasn't meant for a lot of 1st technical stuff. It needs airflow. I can't believe that, or should I? I'm thinking water pump or radiator cap spring. What do you think? Thanks for your help. Jeff PS I'm covered in poison oak to boot. But it was still fun!