Gecko/Rocky-
Thanks for the input. Sorry for not responding sooner, but stopped checking this thread regularly because it was getting little response. You both bring up great points, and because I am getting something done soon, I'm glad I checked this again. I have an FXR3: '99 evo, therefore, should not have a problem with a reasonable bore (3 5/8"). Just thinking of the saying, "there is no replacement for increased displacement" and figured if I'm going to bore it, I may as well stroke it too to 4 5/8" and go with a 96" big bore/stroker build, and do everything else that goes with it, i.e., splitting the cases, new cylinders, pistons, and everything comparable that goes with the 80" hop up. Ofcourse, with the chance of the evo bore issue arising, the extra strain on the valvetrain, and increased cylinder and piston wear (decreased durability and longevity), is 100+hp and 105+tq really necessary anyway? For me,probably not as most of my riding is done between 2,500 and 4,500 rpm, with an extremely rare redlining at 5,200.
So, maybe the safest way to go is with an 80" hop up... Ported heads and manifold for better flow, re-jetted CV carb, with K&N air cleaner, Supertrapp 2 into 1 exhaust, inc. comp ratio to 10:1, Axtel domed pistons, Dyna 2001/ Crane Hi 4 igniton module, V-thunder 3010 or 3020 cam, adjustable pushrods, stiffer valve springs, and add a TP oil pump and compression release valve for safe measure. Been told that similar builds have yielded @80+hp and @ 90tq with no compromised engine longevity, durability, reliablity or tractability. Also, the integrity of the FXR3 and the evolution engine would not be compromised.
Maybe further down the road I would go big via the third option, e.g., Ultima 107 or 113.