RG150 front sprocket

[archie-no2]

Can somebody please tell me what is the stock front sprocket is on an rg150? this one appears to have a 16, should i go with a 16, 15 or 14?

[oyster]

Std is 16 / 47 or 48

For racing often 17 on the front (South Island circuits and Minefeild if tail wind.