Lots of Sprocket Questions! HELP!

[1996svt2.3]

Hey guys i need some help understanding sprocket mods so i can decide what i wanna do to my 400. I know the stock front sprocket is a 15 tooth and if i change it to a 14 tooth i will get better acceleration but i will lose some top speed. However what i dont understand is what all changing the rear sprocket will do. What is the tooth count stock on a 400ex? What will upping the tooth count or lowering the tooth count on the rear do? What will it do in combination with changing the front sprocket to a 14 tooth?

Sorry so many questions i just am trying to understand it all. Im new to these forums and in my search for info on the 400 im glad i found this website cuz it sounds like u guys know alot about our fourwheelers.

Thanks yall :D

[Chanman420q]

the rear is the opposite the front, the smaller the rear the more top end, the bigger the rear the better low end

stock rear sprocket on a 400ex is 38....droping it to a 37 or 36 will ad more top end...adding teeth like a 39 or 40 will give you more bottom

[1996svt2.3]

so if you put a smaller front sprocket on and a smaller rear sprocket on you would just be defeating the purpose cuz they would cancel out RIGHT? not that im gonna do that i just wanna make sure i understand it.

So if i wanted alot of low end torque and acceleration i would want to put a smaller front sprocket and larger rear is that right? How much is too much? just wanting to get some of yalls opinions.

Thanks for the help on this :D

[JD400exrider]

Firt off Welcome 1996svt :D I am sure you will find this site informative. Beware though it is addicting. :eek:

It all kind of trial and error with gearing. Depends on the type of riding you do. If your looking for more low end / acceleration try a 14 tooth. I felt i lost to much top end with a 14. I was looking for sixth gear. I changed back to a 15 tooth and went up one on the rear (ie 39 tooth) It is a good in between. I just got my bike built with a 416 and cam and i am going to look at going back to stock or even a 37 or 36 tooth in the rear. If you do allot of trails and woods riding I think you might like a 15 39 combo. Still gives a good punch off the line but you don't loose as much top end as a 14 / 38 combo.

I hope this helps.

[1996svt2.3]

Thanks for the help yall :D I think i understand now and i have a few things to think about to decide what i wanna do.

I do alot of trial riding and out in fields but i also race on closed courses. I am looking for more take off and acceleration out of the turns BUT LOL even with the stock 15 tooth front sprocket I am already looking for 6th gear JD400exrider. But thanks for all the info it has been helpful.

Later yall :macho

[excess]

any brand names you guys recommend for the front?

[bmw500hp]

the 14 tooth is probly the easiest and fastest way to see a difference in your ex...don't overquestion this mod...try it!

[OCCRA288]

Sunstar. bottom line. I've seen guys thrash sidewinder sprockets that cost twice as much. These guys can also barely get a sunstar to shuck a tooth. I'm gonna use a renthat steel front sprocket and see how it holds up though.

[Dirt]

I'm sure Honda put alittle thought into what sprocket belongs on the quad. I feel that the stock is good for a fairly stock motor and average weight rider. But if you want a little more top end try a 36 tooth rear. Its not as high as as a 14 front...

[excess]

I just ordered the sunstar front sprocket for my 400 with the 14 teeth.