05 yz 450 woods gearing (sprocket) recommendation

4 replies to this topic
  • crmaverick

Posted September 20, 2010 - 03:39 PM


Im looking to gear down my 05 yz 450 for the woods to help compensate for only having a 4 speed. would going down a tooth in the front do the job, or should I go up a tooth in the rear sprocket in addition to this?


  • grayracer513

Posted September 20, 2010 - 04:44 PM


Gearing down won't compensate for a 4 speed, exactly. The low gears of the 4 and 5 speed YZ450 transmissions are the same. 4th gear is in between where 4th and 5th in a 5 speed would be, so the 4 speed lacks a little top speed on the 5, but that's it.

But you may want to drop down a bit because of the rather tall, MX first gear, as some do. In that case, either approach is OK, although using a smaller front is more likely top allow you to change gearing without changing the chain length, and the '05 had a fairly large rear cog already.

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • crmaverick

Posted September 22, 2010 - 11:41 AM


so would going down to a 13t in the front make a noticeable difference, and is the stock front sprocket a 14t on an 05?


  • tech24

Posted September 22, 2010 - 12:34 PM


Yes, give it a try plus its cheaper than a larger rear and like gray said chain will fit you'll just loose a little adjustment range.

  • grayracer513

Posted September 22, 2010 - 12:57 PM


so would going down to a 13t in the front make a noticeable difference, and is the stock front sprocket a 14t on an 05?


Yes to both. Since the chain ratio is 3-something to one, one tooth at the front is like three at the rear.

Related Content


YZ450F 03 Sparks driving me crazy by SirAttard

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 5 replies

Thinking about Yamaha 250... by Arctic Pride

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  491 replies

yz250x vs 450 4t comparisons (preferably desert riding) needed by JakeNorthrupYZ450F

Dirt Bike   Make / Model Specific   Yamaha   Yamaha 2-Stroke
  • 9 replies
WR Camshaft Swap Info - last post by jamesm113

WR Camshaft Swap Info

  • 0 replies

2016 YZ450 by CaptainKnobby

Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 replies

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.