Depends on what type riding you're planning on doing. If you are flat tracking or dragracing, then flipping them would be ok, if planning on trail riding, I wouldn't recommend it. I had that setup, and trail riding got rough when in the tehcnical stuff, down hill turns in dips, ect. It can yank the bars right out of your grips if not ready for it, and sometimes if you are. Save and get yourself a set of arms, I got a set of wicked arms off ebay for $375 a while back, I think their going for about 450-475 now. You can always find a good deal, especially now days. +2 up1
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