changed tire size - what about sprocket?

[josh400EX05]

Alright guys I changed my tires down to 18" in the rear and 20" in the front (stock is 20" rear - 22" front)

Do I need to drop my sprocket down 1 tooth? On the holeshot people are always in front of me and I asked the other guys at the track and they said I should drop my front down 1 tooth.

I plan on getting the sparks timing key this week, airfilter soon, and exhaust around next year

[exrider49]

i have stock gearing with 18" tires and i get off the line b4 450's sumtimes..if u drop a tooth u will have too low of a gearing

[400exfan19]

for the track dropin a tooth is a good idea

[milburn]

going to 18,s is just a subsitute for going to lower gears

[milburn]

go up a tooth

[oldskoolex400]

i wouldnt go down anymore the 05's come with 14t front on my 400 i run 15 t front with 20 in rears but i change sprockets and tires out alot when i ran 14t and 18 inch rears i had alllot of torque sounds to me like you need to put a pipe filter and rejet it to get more acceleration

[oldskoolex400]

it also sounds like you need to practice taking off

[Kaleigh]

14 is the best way to go if you dont have many mods on the 400ex.. if you;re riding alot of track.. go 14... your accel will be noticable.. and its cheap..

[josh400EX05]

Alright, thanks for the help guys, I will work on my starts!! I want to get a pipe/filter/jet but a full system is a tad expensive and I want to do all 3 at the same time

[400exfan19]

ya thats the 3 engine things ive done 2 mine, ive noticed a huge difference. the full system does help quite a bit, but a slip on it good 2