I have been doing some research on replacing my front sprocket. I know most of you guys either go to 12,14or15. I do mostly street riding and so I would like more top end, I was considering a 15t, I know that each tooth is 5 mph but which do you guys think would work best for me a 14t or a 15t? My mods are white brothers MX4 exhaust and Pro design intake and K&N with a re-jetd carb. Thanks!