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KTM 525 Crankshaft

mattyg587

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Joined
Nov 21, 2002
Messages
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Age
50
Website
www.MFG-Racing.com
#1
Eric:

This is the strangest thing I've seen. The bike (2004 KTM 525 SMR with less than 500 miles) started making a strange 'tick tick" from then engine cases. A quick trip to the dealer showed silver flakes in the oil and when torn down it appears that the inner race of the crankshaft bearing has started to pit. What's unusual is that only 1/2 the inner bearing race has suffered this fate, the other half looks perfect. Recognizing that the bearing race is spinning at the speed of the crankshaft (up to 10,500 RPMS) why would it effect only the top half of the race and not the entire circumference?

see picture at: http://www.visordown.com/forums/attachment.php?attachmentid=46301

MattyG #94 Expert LRRS/CCS
 

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