Piece of metal inside coolant jacket! (picture inside) 09 yzf450f

While inspecting the cylinder of my 09 yz450f, I turned it over upside down and a small piece of metal fell out of one of the coolant jackets. I have never heard of this before and I honestly cant think of what could come apart that would have a piece shaped like this. 

 

I just got the bike and found that it had a leaking head gasket, I can tell the cylinder bolts have been out before. 

 

Any help would be greatly appreciated!

 

 

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It kinda looks like a dowel pin for the engine side covers or maybe water pump cover? or something in that nature. Are all of the dowel pins installed where they should be ?

It kinda looks like a dowel pin for the engine side covers or maybe water pump cover? or something in that nature. Are all of the dowel pins installed where they should be ?

I have no clue, got this bike Saturday, PO claimed that they had never done anything to the engine while they owned it, and that the valves had been checked just prior to them receiving it. 

 

I will check into the dowel pin

Edited by fouledout443

its defiantly not the engine side cover pins cause those are a hollow/ bigger pin. but it could be the water pump cover pin.

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its defiantly not the engine side cover pins cause those are a hollow/ bigger pin. but it could be the water pump cover pin.

 

Thanks for the quick reply, I pulled the water pump cover off last night and sure enough, only one dowel pin was in the case. 

 

I appreciate the help! 

Maybe it is a piece from a needle bearing. Have you taken the whole motor apart?

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