I did the same thing as the guy way below to mount to my freespirit. Just tech-screwed dat boi in.
The only thing to consider is that for a freespirit, you essentially only have 1 mounting position since the seat pan's length is pretty much the space between the mounting points of the stock freespirit frame.
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i cant even, just ugh!!
August 18, 2014
taco eater :
john burnette from Lafayette, GA United States
i used two short pieces of galvanized bracket strap to mount right on the rack. it sits low and back over the shocks and feels great with some mid rise bars.
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09 st compatibility
March 23, 2014
taco eater :
slow n disorderly from prescott, AZ United States
cut off the posts,drill and tap some m5 holes,cut the oil storage box a inch about around the back and drill a 5th hole for the seat lever post nut bracket thing.get rid of that stock st seat.
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great seat
October 6, 2013
taco eater :
gOOSE from THAT PLACE
Bought this one for the material. very comfy, but ve prepared to make a seat bracket. I welded a big piece of plate to a piece of handle bar and bolted it to the seat, GOOD TO GO!
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Finally
November 29, 2012
taco eater :
Nick Tresaloni from Kingston, NY United States
I was finally able to get my hands on one of these and mount it on my free spirit. Obviously wasn't a direct bolt up cause of the Free Spirit's dumb frame/seat brackets. But no worries! The seat pan is steel dude! Nothing a few tech screws couldn't take care of and voila, a nice place to plant my boney ass and tool around town. It's super comfy too. Wins all around
Freespirit shenanigans 
i cant even, just ugh!!