Hi All,


I am thinking about Re-Gearing my '04 Z400.

See Sig for my Specs.


At first I did not want to re-gear because I didn't want to loose any top speed. But the more I ride, the more i relyize that Top speed rearly comes into play, Torque comes into play much more often...

Every track, every riding park I've been to, I've never used Top Speed..


Anyway, I'd like to gain a little more torque. I've read that a 13 tooth Front Sprocket is good... I assume the stock is a 14 tooth?

Is there a difference if I Change the front sprocket, or the rear sprocket? Is one better to change than the other?

What is the size of the stock rear sprocket?


If i Change either or both sprockets will I need to replace the chain?


Thanks for the help,

-ThaChad

 

hey, changing one tooth on the front sprocket is like changing three on the back one. You will need to get a bigger back sprocket for the back if you want more acceleration. The back sprocket is used for fine tuning. I had a larger front sprocket on my Z and never had to do any work with the chain however the guard for the front sprocket doesn't fit anymore.

 

Yes I would change the front because if you start going bigger in the rear it starts rubbing and they get too big. I would for sure go down one maybe 2 in the front. They are so cheap at www.rockymountainatvmc.com that if you get both 12 and 13 you should be fine. They are only like 7 bucks a piece. I went with a 12 on the front and holy cow talk about tourqe!! I love it

 

I have a KFX 400 (same as Suzuki LTZ 400) and I am in the process of putting a 12 tooth on the front and a 44 on the rear (stock is 14 on the front and 40 on the rear). I do a lot of rough trail riding and want to gear down for both going up and down steep narrow trails. I also do Sand dune riding. In both of these 5th gear is never used so cutting my top end down is not a problem.

I probably will have to put a new longer chain on. I have the 44 tooth sprocket and am waiting for the 12 tooth to be delievered. Oh, I think I will have to space my guard down 1/4" or so to clear the 44 tooth.

 

I don't know if it is necessary to go down that much really. I also ride the dunes and a lot of trails out here in the desert. I think with the 12 in the front I gained A LOT of bottom end.

 

Hey Guys,

Thanks for the input! It sounds like the best thing for me to do is go down 1-2 in the front.... I think I will try a 13 tooth first, to see what kind of difference that makes...

Does changing the front or back make the extra power at different times? In other words, if i change the front sprocket only, will i notice the extra torque in a different throttle range than if i were to change the rear sprocket only?


I know there are handfulls of different sprocket manufacturers, is there one that is better than another? Lighter, stronger, etc?


How hard is the front sprocket to change? (Seams like it wouldn't be too much trouble?)

Thanks again for the help,

-ThaChad

 

It is really easy there are about 4 little bolts you have to remove then you have to adjust with the 4 bolts that are on the swingarm. I got mine from www.rockymountainatvmc.com like I get all my parts!!! I just got the cheap one. It was like 13 bux shipped. It will give you more power throughout all of your gears. More low end power that is.

 

I was looking at rockymountainatv for those front sprockets 12 & 13 tooth, but I could only find 13, 14, 15.

.. Atleast that's all it showed me after entering my model & year into the parts finder.


-ThaChad

 

just go with the 13, i did it on mine and it really brougt it to life, even in 5th gear it had alot of pull
i just put a 12 on my drz dirt bike but like you i could only find a 13 for the atv, no need for another chain
just tighten it the proper amount, not to tight, i think you will be happy with it, the best 7$ you will spend on your Z

 

Your can order a 12 tooth from Sidewindersprockets.com for the 400. They are custom made out of titanium and are $60 for the 12 tooth