Absolutely zero scientific data that nitrogen does anything for a streetbike other than transfer money from your pocket to someone else's pocket. There are many previous threads on this subject, none of which contain anything that supports with facts the use of nitrogen in motorcycle tires.
You want to use nitrogen, go for it. Just as some folks just can't resist those Nigerian scams and keep losing money to them, some folks just seem to want to hand their money to the snakeoil salemen that have always surrounded the auto (and motorcycle) business. At least the nitrogen won't cause any harm, other than helping to empty your wallet. If you want longer tire life and cooler running tires, try checking and adjusting your air pressure to the manufacturer's specs on a regular basis. I'll stick with the 78% nitrogen mixture I get for free, thank you very much.
Jerry