i wanna improve my top speed on my 400ex.... 15 teeth is the stock size for the front (engine) sprocket i got a 16 teeth size sprocket but im wondering if its gonna be as good as im expecting..... will i be able to pull this gearing throughout the entire powerband im leaving the back sprocket stock i got stock tires.... my mods are full system pro meg pipe, modded abox lid, k&N filter, jet kit any info will be appreciated

 

You will notice a big increase in top speed. Unfortantly you do not have enough mods to pull hard off the line. If you do most of your riding at very high speeds this would be a great addition to your quad. But if you ever decide to race threw tight woods you will think you where riding a Yamaha Warrior.