Chunk of aluminum in oil

[roundhouse]

I changed my oil this morning and found this chunk and a couple flakes of aluminum. This is the 4 or 5th oil change and I found a couple little flakes in the first change and did not worry about it. This chunk is fairly significant.

Bike starts and runs the same. I did install an oil cooler on my last change 3 months ago or so. Could it be from that? Or should I even worry about it?

Here is a pic. The dirt on my glove is from picking up my oil pan the oil only had 200-250 miles on it I estimate and looked pretty good. (My speedo stopped working so I guess mileage)