bryan1984
03-04-2012, 10:18 PM
This is not off of a 400ex but I thought it was interesting. Working on this quad for a buddy and this is pics of the flywheel hub and crankshaft. The motor had a bad solid sounding nock to it and was getting metal in the oil. Small particals. Low houred 07 350 yamaha. The key way wasn't sliped and the hub was on the tight not loose. I know this ain't the yamaha forum but thought you all might find this interesting. Have yet to know what caused it.
Pic of the crank is not to good, it looks worse than the hub does tho.
<a href="http://s1209.photobucket.com/albums/cc393/bgb1984/?action=view&current=350r1.jpg" target="_blank"><img src="http://i1209.photobucket.com/albums/cc393/bgb1984/350r1.jpg" border="0" alt="Photobucket"></a>
<a href="http://s1209.photobucket.com/albums/cc393/bgb1984/?action=view&current=350r.jpg" target="_blank"><img src="http://i1209.photobucket.com/albums/cc393/bgb1984/350r.jpg" border="0" alt="Photobucket"></a>
<a href="http://s1209.photobucket.com/albums/cc393/bgb1984/?action=view&current=350r2.jpg" target="_blank"><img src="http://i1209.photobucket.com/albums/cc393/bgb1984/350r2.jpg" border="0" alt="Photobucket"></a>
Pic of the crank is not to good, it looks worse than the hub does tho.
<a href="http://s1209.photobucket.com/albums/cc393/bgb1984/?action=view&current=350r1.jpg" target="_blank"><img src="http://i1209.photobucket.com/albums/cc393/bgb1984/350r1.jpg" border="0" alt="Photobucket"></a>
<a href="http://s1209.photobucket.com/albums/cc393/bgb1984/?action=view&current=350r.jpg" target="_blank"><img src="http://i1209.photobucket.com/albums/cc393/bgb1984/350r.jpg" border="0" alt="Photobucket"></a>
<a href="http://s1209.photobucket.com/albums/cc393/bgb1984/?action=view&current=350r2.jpg" target="_blank"><img src="http://i1209.photobucket.com/albums/cc393/bgb1984/350r2.jpg" border="0" alt="Photobucket"></a>