what gearing w/ 18s

[Jessem24]

what do you motocross guys run with your 18s? i was thinking 15, 38, or 14, 37?

[slightlybent47]

14 - 36 is what I run on wide open tracks.
14 - 37 on tight tracks.

[honda400ex2003]

i would be running a 15-38 setup with 18s on a track and see how it does. the stuff i ride on that is track type stuff would be good with that. steve

[Johnny Minehan]

Jesse i ran 14 37 on the yellow machine and that seemed like the perfect formula.

[Jessem24]

i wonder what it would be like if i kept it the way i have it now lol

its 13/39 right now with the 20s for XC racing

[KISSmyACE]

Originally posted by Jessem24
i wonder what it would be like if i kept it the way i have it now lol

its 13/39 right now with the 20s for XC racing

you'll hate life. we put 18s on my quad and kept my gearing the same, and I got to 5th gear before I knew what to do with myself and couldn't keep up.

[KISSmyACE]

but now that i think about it, the gearing between the 04 and older, and the 05 and newer is different... so that should change things.

[slightlybent47]

Originally posted by Johnny Minehan
Jesse i ran 14 37 on the yellow machine and that seemed like the perfect formula.

Yeah but theres no top end with the 14-37. That works good on a tight track buy if it has long straits then I go to the 14-36 for a little more top end.

[slightlybent47]

http://home.earthlink.net/~gellett/400ex.htm

Here is a speed calculator that may help.

[honda400ex2003]

ah beat me to it slightly, i was just going to post that. steve

[Jessem24]

now when i get a chain, how many links do i need? links to a recomended chain is appreciated too. thanks

[honda400ex2003]

94 is stock so if you go with a 37 and a 14 i would go with a 92. you would not have much adjustment if any at all with a stock length chain. once the stock one starts to stretch it is hard to get enough out of it with a 14 tooth. you may even be able to go down to a 90 if you can find one. just my .02 though. steve

[Jessem24]

now help me out here man , were in the hell do i find a 92 link or 90 link chain? lol all i can find is 100+

[slightlybent47]

Just tell them it’s for an ex and it will come with a few extra links. You will probably need to cut a few links out when you install it. For mx I use a non o-ring chain, it takes less power to turn the chain. But if I was doing a lot of mud ridding I’d go with an o-ring chain. Get a few master links when you order your parts. Those little E- clips have a tendency to pop off when you put them on, never to be seen again.

[Jessem24]

well, i was gonna go with an DID ATV Z ring chain. i just didnt know about how many links. ill go with 100 and cut some out i guess

[slightlybent47]

Yep!!!!

[honda400ex2003]

Originally posted by Jessem24
now help me out here man , were in the hell do i find a 92 link or 90 link chain? lol all i can find is 100+

i bought mine right at 94 links from dennis kirk i believe. steve

[honda400ex2003]

lets see they have 82 to 104 in even numbers so you should be good to with either a 90 or 92.

http://www.denniskirk.com/jsp/product_catalog/Product.jsp?skuId=119340104&store=Main&catId=&productId=p11934082&leafCatId=&mmyId=
you have to let it load for a while dennis kirk must have something wrong with their site it will come up though.
steve

[Jessem24]

thanks man! that helped me out alot

[Jessem24]

although it says max engine size of 400cc? is it strong enough

[honda400ex2003]

it should last you a long time, it is a great chain. the x ring is the only chain i will run from now on. i have one on my cbr and my 400 and have had zero problems with them in about 3 years of hard riding in mud, water, sand, anything imaginable. steve

[trailrider894]

what is maintenance like on an x-ring vs. o-ring?

[honda400ex2003]

wow almost a year. imo the same. oil it every now and again and you will be good to go. steve