07 YZ450F Gearing options, 47 or 48 tooth?

5 replies to this topic
  • Racinkc1

Posted December 16, 2015 - 02:08 PM


So this bike comes with a 49 tooth rear sprocket... Wanting longer gears. Should I drop 1 or 2 teeth? I know honda's come with 51 tooth rears and you usually drop 2 teeth to a 49 tooth to notice a difference... Would you try the 48 tooth first? Probably not?

  • stevethe

Posted December 17, 2015 - 09:11 AM


One tooth doesn't make a big difference.

  • cpetz24

Posted December 17, 2015 - 11:43 AM


Is this for moto or something else?  If you want to be able to feel a noticeable difference you're going to need to go at least 2-3 to tell significantly.  1 tooth is only a 2.1% change so it's going to be hard to notice.  If you go 3 now you're up to a 6.2% difference which you will feel.    Gear ratios are just math.  

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • Wiz636

Posted December 18, 2015 - 08:07 PM


Whenever I want to gear up for some more open and fast riding I leave the rear sprocket alone and throw on a 14t front sprocket. Lot's easier and cheaper.  That's roughly equivalent to dropping 4 teeth off the rear sprocket.

  • Racinkc1

Posted December 19, 2015 - 12:33 PM


good to know guys. 4 teeth is a little much, but its cool to know that ratio. I figured 1 tooth wouldnt be noticable.....

  • grayracer513

Posted December 20, 2015 - 08:36 AM


More like 3 teeth, actually.  


49/13= 3.77:1


46/13= 3.53:1    


49/14= 3.50:1


I used to switch between a 14 and 15 front on my '03 all the time. 

Related Content


Help with 2000 yz426 by weekend woods racer

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • Hot  36 replies

YZ450F 03 Sparks driving me crazy by SirAttard

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 5 replies
WR Camshaft Swap Info - last post by jamesm113

WR Camshaft Swap Info

  • 0 replies

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

Dirt Bike   Make / Model Specific   Yamaha   Yamaha 2-Stroke
  • 9 replies

Chubby dad, looking at bikes , First trip to the orange/black forum ! by Slow_ride

Dirt Bike   Make / Model Specific   KTM   250-530 EXC/MXC/SXC/XC-W/XCR-W (4-Strokes)
  • Hot  28 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.