yz 400 gearing 52 tooth rear sprocket

7 replies to this topic
  • elm327

Posted September 26, 2006 - 07:27 PM


my 06 wr 450 got stolen so i picked up a clean 99 yz 400 , man different bike for sure, i am really starting to like ole blue but it is geared way to high for woods riding, would a 52 rear sprocket help??? it has 14 front and 50 rear now, would i tell a difference with this set up?? thanks for any info.

  • SRT426

Posted September 26, 2006 - 10:07 PM


Try going to a 13 tooth on the front, thats like adding 3 to the rear. See if you like that and then maybe add or delete a tooth from the rear to fine tune it. It's also to cheaper to experiment with front sprockets than rear :thumbsup:

  • 2tall2tall

Posted September 27, 2006 - 07:45 PM


I have a 54T Krause/Sidewinder rear sprocket that is almost new for $20 that will bolt right on. PM me if interested.

  • xnofriendsx

Posted September 28, 2006 - 09:34 AM


I have a 2002 YZ426 and have 14/50 gearing, same as yours.
Stock is 14/49 i am pretty sure.
Going to a 52 would be a pretty big change. It is always fun to experiment though. Just be sure to take into consideration the new chain length with any sprocket change. 2 teeth in the rear is 4 links less, right?
Like the previous guy wrote, adding a 13 in front is what a lot of woods/trails riders do.

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  • YZ426F Rider

Posted September 28, 2006 - 10:00 AM


I run 13/50 for the tight single track and it works out pretty good.

  • onecolumbyte

Posted September 28, 2006 - 03:52 PM


Do you have to shorten the chain when losing teeth on the front sproket too. Seems like it wouldn't make nearly as much of a diameter/ circumference difference since the sproket is so much smaller than in the back...

  • xnofriendsx

Posted September 29, 2006 - 07:38 AM


Adding 1 tooth or two teeth to the front or rear sprocket
Add 2 links to the stock chain length

Subtracting 1 tooth from the front or rear sprocket
Use the stock chain length

Adding 2 or more teeth to the front or rear sprocket
Add 2 links for every two teeth added

Subtracting 2 or more teeth from the front or rear sprocket
Subtract 2 links from every two teeth subtraced

This is according to the Rocky Mountain catalog.

  • CRF150Joe

Posted February 23, 2007 - 11:21 AM


I have I think 14/49 on mine I havent ridden it yet but I rode a CRF450 with stock gearing and it was amazing. And crazy fast in the trails. I think the stock gearing for the 400 would work good because remeber these bikes have alot of power and can spin those sprockets. If you go too high in the rear sprocket like teeth wise that thing is going to be wheeling like a lil bitch and that will get annoying haha

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