Is my motor bored or not?



I just bought an 01 blaster and when i went to rebuild the top end i dicovered that it had a hot rods rod and after market pistonI:I Buti dont know if it is bored out or not this is one of the numbers on top off the piston: 84780.
I went to the Wiseco site and there are no pistons with that #. The only real way to tell is to go to a shop and have them mic the cylinder. I would be willing to bet that is is bored since it has an after market rod.
ya that is what i was thinking and for the carb what number should be on the fuel jet if it is stock?