you asking this means you dont understand race gas. race gas goes in race engines/high compression stuff. street gas goes in street engines. race gas gives a different burn, burn temps, ignition, combustion speed, cylinder temps etc.
87 pump has less additives in it hence it burns better. dont waste your time on race gas, you don't need it, you have a stock motor, its a waste of your money to do so.
just make sure the tuner gives ya a nice flat 13.4:1ish air fuel ratio across the whole board, the hp and tq numbers dont matter as long as the air fuel is good, your bike is happy and running efficiently