I'm not criticizing anyone but I've never understood people's desires to buy a vehicle, then make it faster. I see this characteristic in Harley riders all the time. They buy a seriously underpowered, relatively poor handling machine, and spend endless hours and money to make it somewhat faster or louder. Why not just buy something faster or louder to start with?
My own experience with my '05 FJR is that it is an incredibly well engineered sport touring motorcycle. It has gobs of torque. It accelerates up a mountain with 2 riders and luggage. For the type of bike it is, it handles beautifully. And it is what it is. If I want more power in a sport touring motorcycle, I'll buy a Concours 14.
I did want more power in a personal (non-touring) motorcycle so I bought the most powerful sportbike I could buy, a Suzuki GSX-R1000. It's not a sport touring bike. Neither is the FJR a sportbike. Comparing them is like comparing oranges to apples. Yeah, they're both fruit.
I'm satisfied with both bikes. Other than some small cosmetic changes, I wouldn't change anything of any consequence. Without spending some serious money, I'm sure I can't improve the performance or handling of either motorcycle. And, I don't want to. The people that designed them did excellent work.
By contrast, my son bought himself a GSX-R1000 and he's spent a fortune on it to make it faster. Stock, at sea level, it would do a sub-10 second quarter mile. Is a another 1/2 second off that time really worth several thousand dollars and hundreds of hours of trial and error tinkering? Why not buy a sportbike from a speedshop where professionals have already made the mods? He could have been out riding rather than cursing in his garage over all the time and money he's spent.
And one other thing. Both of my bikes are not temperamental. My son can't say that about his juiced up wonder bike.
Anyway, my 2 cents.
IRBR