asking this question everyone will say NO... they are a waiste of money... but from my experience i had a polini one and it did make a difference...but my carb was set up shit when i had it on... so i think it worked better because my bike was very rich....but u have to get in the right position to work good... well you did with mine
ohh and how they work... when u let of the revs... petrol is stored in the boost bottle.... so when u throttle again petrol is already there.... and is quicker throttle responce.... and in theroy sure its mena save u abit of petrol as well instead of it being waisted
