Have a 05 kxf250, havt had any problems until now. I replaced the head gasket and still it runs coolant out with reving the bike. I can hold my finger over the over flow tube and it builds up pressure. Has anyone had new gaskets that were faulty? or cracked heads? This happens right after starting the bike, the coolant isnt even hot.. Just got done looking at the and I let it idel for a while and it did not leak. I cracked the thottle a few times and a little steam came out then coolant. I dnk much about the timing or cdi box. I used the second mark on the flywheel which the book called the top mark. Need some info fast.. Have a race to go to on sunday!