Warrioreater400ex
05-03-2006, 05:28 PM
Hello, me and my friend rebuilt our 2nd 400ex the other day, we followed the book and throught e did everything right, however when we try to start it, it sounds like it has no compression, the starter turns fast and it just doesnt sound like its hitting, we have spark and fuel. We have the timing on top dead center, the T on the flywheel with all the cam lobes straight down.
Im thinking it has to be in the head/valves. I wire brushed the valve faces to get the carbon off, but i didnt even touch the valve seats with the brush. Maybe the valves need to be adjusted? any i deas? it must be something big because we have NO compression. i can spin the flywheel with one hand pretty fast without feeling any compresson.
Im thinking it has to be in the head/valves. I wire brushed the valve faces to get the carbon off, but i didnt even touch the valve seats with the brush. Maybe the valves need to be adjusted? any i deas? it must be something big because we have NO compression. i can spin the flywheel with one hand pretty fast without feeling any compresson.