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Old 12-03-2012, 01:00 PM   #3
tntmo
Gnarly Adventurer
 
Joined: Jan 2012
Location: San Diego, CA
Oddometer: 431
Seems more likely that dirt or something else got into the cylinder and caused those marks. The YZF has a nikasil cylinder, not much can be done for damge done to it except for replating the cylinder or getting a new one if the damage is beyond limits.

A timing chain will not cause that damage. If your timing change was loose enough to cause damage, it would have skipped time and you would have bent valves.
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