[400ex front sprocket] - ATV Riders Forums - Honda, Yamaha, Suzuki, Kawasaki, Polaris, CanAm, Arctic Cat, Kymco ATVs

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400ex front sprocket
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Posted by: dunes_rider

hey guys what's the 400ex front sprocket stock size and i want to go for better takeoff which size should i get ?

Posted by: Phantasm400ex

14 tooth front sprocket for better hole shot and torque. stock front sprocket is 15 tooth.

Posted by: key4202003

15 stock front, 38 stock rear

if you want more take off drop one in front.

if you REALLY want to top out FAAST. go 14/39!!
only draw back is 5th gear feels like it should be fourth, but well worth it!!!

Posted by: 400EXtreme

im pretty sure its 15 tooth. Id go with the 14 tooth so u keep some topspeed.

Posted by: Phantasm400ex

if you want top end run go up one tooth in the front to a 16 tooth, leave the rear stock. it all depends what you have on your bike as far as mods. if the bike has the power it's worth it to go up a tooth.

im currently running 76.5mph on GPS.
2004 400ex
white brothers rev box, 16/38 gearing, K&N filter & jet kit, duncan racing full exaust ( double barrel).

Posted by: stic

if you want the bottom end,does it matter if you go down one in the front or up one in the back? it accomplishes the same result,correct?

Posted by: Phantasm400ex

going up one tooth in the front is equal to about going down 3 teeth in the rear

Posted by: 2004exrider

lovin my 14/39 set up!

Jimmy

Posted by: dunes_rider

hey guys my quad has :curtis sparks x-6,dyna jet kit,k&n filter,cdi rev box,degree key

and 14 tooth front sprocket i think it's ok because i want for hill climb

so what do you think??

Posted by: jak1389

14t for sure

Posted by: quad2xtreme

quote:
Originally posted by stic
if you want the bottom end,does it matter if you go down one in the front or up one in the back? it accomplishes the same result,correct?

Going down 1 in the front is approx the same as going up 3 in the rear.

Posted by: smokinwrench

quote:
Originally posted by Phantasm400ex

im currently running 76.5mph on GPS.
2004 400ex
white brothers rev box, 16/38 gearing, K&N filter & jet kit, duncan racing full exaust ( double barrel).

I'm running 16/38 gearing also. Its great IMO. I have stage 2 hotcam,WB slipon, 10:1 wiseco piston, velocity intake.

Posted by: quad2xtreme

by the way, nobody can really tell you whether you should go down 1, stay the same, go up a tooth, or to start in 2nd instead of first. A solid launch has more than one factor and torque certainly isn't the only one. Having enough hp to keep the wheel spinning is key too. Nothing worse than bogging down and having your tires grab traction. You have to experiment. Your tire size (18", 20" 22"), type of tires, starting surface, your weight, rider positioning all play a critical role. At about $8 each, get a 14 and 16 tooth and experiment.

/Jon

Posted by: Wandell

It really depends on how you use your quad. If you want take off power and ride on tight trails or tracks, go to a smaller front sprocket.

Posted by: blakefoote

stick wi the stock sproket....i changed mine and I hated it...u will have to be hitting jumps in 5th atht youwould usually clear in 4th w/ half throttle.....i got a 14t

Posted by: Joe400ex

i have stock sprockets and chain. but if i werer to go with a 14 tooth up front can i leave my rear as is. Also if i go one smaller up front will my chain need to be adjusted thanks

Posted by: yamablaster24

i got a 16/39 with 18" tires and i have stock 400ex with stock gearing. They feel about the same except the 16/38 has a built motor. Of course the 16/38 bike is fast because of motor but the gearing is similar with the tire change.