i picked up a 400 ex from a friend of a friend that didnt run. he said he was riding it and then i cut off and would never start back up. Threw a battery in it and when i hit the starter there is no compression in the motor. doesnt really sound like it is even pushing the piston..
So i started with the tear down tonight and made it to getting the valve cover off. First thing im going to check is timing. Just looking at the cam everything looked good but i notice the decompression mechanism is sloppy and loose. The spring and plunger look okay but i can wiggle the whole mechanism and spin it around the cam. Is this normal??
also, anything that i should be looking for right of the bat? im planning on checking timing first just to make sure its in speck and then im going to pull the head off and see if i can see anything else. If nothing then ill pull the jug off and hopefully that will tell all.. Im really hoping i find the problem sooner than that but i have a bad feeling im not going to.:aargh:
