I dont see what a boost bottle does i have had one on my bike before and it did f*ck all..... Waste of money...
Takes unwanted fuel out of the carb and then puts it back in later or something. I also heard it helps for acceleration but thats a pile of shit they just look nice
That's why Yamaha, Honda used them on there bikes. Basically shall we say, it's a crutch for a badly set up carb, it will mask problems. They do work but only for a split second when you crack the throttle open. Size and pipe length need to be right.