Tire size and sproket size

[fastkid400]

Im planning on gettin 18s and i have the stock tires on my 250x, i think they are 21s er 22s. neways wood you go to a 14 tooth sproket? since the stock is 13. and how bout the rear?

[400rednEX]

front sprockets are cheap try a 14 and a 15

[fastkid400]

Wher can i find a 15 tooth, wood i have to take of the case saver?

[400rednEX]

chapparal has 11-16 listed or c&d probably has them too. you will probably have to grind or get a new case saver for it. you could get the 14 first and see how much room you have left.