Mate, I presume you mean the bolt heads are rounded and the threads are ok, the front bumbers are worth nothing, get the angle grinder out cut the bolt heads off, then get some vice grips and get the threaded end out. I suppose you could stuff around with easy outs but just hack the bar up and throw it away.
Man sorry if this sounds over the top but the bars are worthless. I dont mean to be a smart arse but make sure your undoing them the right way. Mine came straight out. Sounds like Honda might have put some lock tight on em.
HMF Bill Ballance full system with HMF controller, Pro design Filter and billet adaptor,
Fox Evolve Gen 2 with Houser +.75 arms,
Fox Podiums with Shock Pro skull covers,
OMF re-enforced front and rear with Kenda XCF up front and of course Kenda Kutter's on the rear,
Trail Tec bars, clamps and dash.
Braided lines and billet clamps,
Moto Active nerfs and Bumper,
OZlink gets his Kutters from me