do the gearing booste bottles do nothing dont waste ur money ther are for looks...14/40 is popular gearing i cant remember which makes u accel faster bigger front i think but dont hold me to tht
The stock 13/40 gearing is a compromise at best, if you put a 14 tooth front sprocket will make 6th gear totally USELESS!
Go for a 41 or 42 tooth rear sprocket, it will give you what you're looking for.
u also need to remember the front sprocket is cheaper and it does more work for you... on tooth size up front is the same a changing 3 teeth in the back. if you look a motosport catalog they have all the stock gearing and a nice little gear ratio chart to cut out and put in your tool box or trailer.I:I