I've done some searching on the net, Its either 13 pounds or 16 pounds. Beats me on which it is. You're just gonna have to do some looking on your own. Good luck and post it when you find the real number.
13lbs seems light, I just took mine out the other day and it seemed heavier then that. Checked the TRD site and it said their Lightened Flywheel which is 4.4kg is 27% lighter, so I guess 13lbs is right.
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