i was looking on pm tuning and saw boost bttles that screw into the carb are they worth putting on or dont the make a diffrence.
Might aswell burn a £20 note to be honest. They're pointless on Low Cc bikes. At most all they do is throttle responce.
Not worth the time or money, by you asking if there easy to fit as you have no instructions im guessing you have got one, If you go on google image's and type in 'Boost bottle' There is an image that's from PmTuning that should tell you all you need to know.