It looks like a realy big capacitor. One way to find out is to disconnect it and see what stops working. I would be real careful if it is a capacitor. It will probably have enough juice to straightenl your short hairs.

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2007 Suzuki Vinson 500 4X4
2007 Toro 6.5hp
2006 BMW X5 4.4 ltr (his)
2001 BMW X5 4.4 ltr (hers)
1994 Honda XR650L
1984 Honda XR80

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