Hiya,

The 14 tooth sprocket is one of the most common upgrades you will find, it makes a noticable difference to your throttle response and helps punch you along ....

As for other mods, the list is endless ... lightened flywheels, larger airtubes, Ohlins rear shocks ....

The other very common and noticable upgrade is to fit a 180 section rear tyre in lace of the 190, it will help it turn in quicker .....

With the sprocket you may need to shorten the chain slightly but someone with more know - how than me will be along soon to advise you on that ....