Sprockets for 400ex

[Depalma]

Thanks for the info on the chain, I ordered a did x ring atv chain, I also ordered Renthal front and rear sprockets . I ordered the 15 and 38 just like stock. my qoestion is if you go down in the front to a 14 I will have more bottem but I will lose my top end? Or in the rear if I go up to a 39 rear what will happen and is there really a big difference?

2002 400 ex
e-seiries
ac nerfs and bumper
K&N jet kit

[cals400ex]

a 14 will provide more bottom end power for sure. yes, you will loose a decent amount of top speed too. a 39 rear will provide a bit more bottom end than stock but not as much as the 14 front. however, wtih the 39 you won't loose as much top speed. 1 tooth change in the front equals 2.5 in the rear.

[TRXRacer1]

With the list of mods you show you'd be better of with a 14t front sprocket. You may loose the ability to run higher speeds but the time it takes you to get there isn't worth it. Drop a tooth in the front you won't regret it.