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400ex problem...weird
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Posted by: spliffy

Hey all, my buddy bought a 400ex before winter & it didn't run for chit, but we didn't care, figured some rings & a piston it would be golden....to make a long story short we just tore it down & the rings are shot & we are trying to get the piston pin out & its to our best guess rusted in place, we got the clip out & it looks like its basically welded onto the rod, we tried lubricant & even a c clamp with a bolt & still unable to move the pin to get the piston off.... guessing this thing had some water in it & where the oil wasn't sitting, it rusted the heck out of it..... anybody with a idea on how to get this stubborn pin out? HELP!

Posted by: Barrymaxx

Does the pin move in the piston? in the rod? If its seized in the rod, your looking at a new rod, o just another used crank. If water sat in the motor, you have alot of other things to look into too.