largest front sprocket that will fir 2001 fazer 600

[jackinacabin]

The title says it ... I want to put the  maximum I can to make this very rapid bike a bit less of a screamer and less gear changing , I have a Kliktronic gear shifter as I am disabled  but even so minimising changes is good ...  I have a 17 waiting ti be fitted here but wonder if i can go higher without getting a longer chaib ... cheers  folks