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These are main bearings. They show damage from transmission-metal. The metal is mixed with and flowing in the oil. On this Wing, it is caused from a wearing transmission. For a couple of years, this customer continued riding after he first noticed that his Wing was ghost shifting. Like many riders, he thought his transmission issue was caused from his "miss-shifting."
 

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These are main bearings. They show damage from transmission-metal. The metal is mixed with and flowing in the oil. On this Wing, it is caused from a wearing transmission. For a couple of years, this customer continued riding after he first noticed that his Wing was ghost shifting. Like many riders, he thought his transmission issue was caused from his "miss-shifting."
How many miles on those bearings?
 

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looks like the bearings did their job.:smile2:

Yes ... bearings in a 5th gen are designed to capture metal instead of allowing the metal to continue flowing through the engine causing further damage. The down side to that type of design is that the captured metal scratches and wear on the crank shaft. But our crank are extremely hard. They cannot be ground down and 10 over bearings added like a small block Chev, but they can be polished. Thus far, I've had many polished, and have not had to replace any crankshaft.
 
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