another 125r question
 

I've been told many things about the 14t sprocket mod however there must be something I'm missing on my 08 125r i max out at 110 in 4th or 5th gear and beyond that i cant get it any higher, i here of other riders heavier and taller then me reaching 125 or 130 or higher. now i've bene told the 14t sprocket helps with acceleration but robs from your top speed, my bike is currently completely stock. so I'm wondering what would happen if i swapped the sprocket, put a k&n filter, and put a performance spark plug in it would do for the acceleration and the top speed. i'm not interested in an exhaust even though i now thats whats limiting the bike i just don't want to spend to much money on the 125 cause i'll probably be upgrading anyways in about a half year anyways. so any help, ideas, or opinions would be great.