Recently, I rode with a friend who was on an Aprilia Futura, which is the same as my other bike. I always knew the FJR was no match for the RST as a sporting bike, but riding along side the Futura put the comparison in stark contrast.
Sport-tourer vs sport-
tourer.
The longer wheel base of the FJR, the 150 pounds more weight, fewer gear choices, lack of cornering clearance, etc. are all reasons why there's little surprise the RST shows the FJR so painfully lacking in sporting duty.
Now, Motorcycle Daily describes another reason: "...the bike with the lighter reciprocating mass (crankshaft, etc.) will be as fast or faster around the racetrack, due to its ability to carry more corner speed." Not only is the mass of the FJR power train heavier, but more of it is farther from the center, thus multiplying the effect... in-line 4 vs v-2.
Click here ===>
https://www.motorcycledaily.com/23january07_800s.htm if you want to read the rest of the article.
None of this means the FJR isn't a great bike; it is one. It just means that you must be sure before choosing a bike what it is that you get vs what you give up... and more importantly: once choosing the FJR don't let your imagination about the FJR lull you into the notion that somehow Yamaha's engineers have rewritten the laws of physics. They have not. And if you do foget, those laws are there to swat you painfully back to your senses.
Climbing down from my soap box now.