2010 YZ450 Gearing

19 replies to this topic
  • skullcandy

Posted June 20, 2010 - 10:07 AM


Whats the best combo for gearing, racing MX, etc.

What are you boys running, and whats it ride like?

Stock 13/48 seems tall

  • delmas

Posted June 20, 2010 - 02:03 PM


whats the best combo for gearing, racing mx, etc.

What are you boys running, and whats it ride like?

Stock 13/48 seems tall

13 50

  • Jeepentj

Posted June 20, 2010 - 02:41 PM


I'm running 14/51.

  • racerxx276

Posted June 20, 2010 - 03:07 PM


12/48 this keeps it in 3rd most of the most track corners

  • grayracer513

Posted June 20, 2010 - 05:33 PM


I'm running 14/51.

On a 2010?

  • colinf713

Posted June 20, 2010 - 06:57 PM


jeepentj how is the 14/51

  • grayracer513

Posted June 20, 2010 - 07:27 PM


Before you get too excited, you should understand that 14/51 and 13/48 are effectively identical (3.64 vs. 3.69)

  • colinf713

Posted June 21, 2010 - 10:03 AM


Would the 14/51 still make the gears any higher since your adding to it?

  • colinf713

Posted June 21, 2010 - 10:04 AM


Or i shouldnt say higher, they would have the same gearing ratio but just longer right?

  • grayracer513

Posted June 21, 2010 - 11:52 AM


In theory, a 14/51 will wear longer because it has more teeth bearing the same load, and produce less losses to friction and reduced chain wear because the chain rollers don't pivot as far in rolling around the larger sprockets, particularly the front. In practice, there's not a very significant difference in anything other than the front sprockets. A 14 will wear noticeably less than a 13 over the life of the chain set, but will still need to be replaced by the time a really good chain is worn enough to warrant replacement.

The friction reduction is probably unmeasurable. There's only a two degree difference in the link angle of pivot at the front.

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • BBrown626

Posted June 21, 2010 - 03:43 PM


I added a tooth to the back. It made a little difference. The best combo depends on the track. I found this one works pretty well for me. Individual preference is important.

  • colinf713

Posted June 22, 2010 - 07:06 AM


Is anyone running a 14/52?

  • grayracer513

Posted June 22, 2010 - 07:36 AM


Lots of guys running 13/49, which is the same thing as 14/52, really.

One thing you start to run into with rear sprockets that large is an excessive amount of drag on the trailing edge of the lower chain guide under decel loads.

  • 95s10nj

Posted October 26, 2010 - 05:28 AM


Im debating on whether to pick up a 49 or 50 rear sprocket. The bike is currently stock and i would like to use 3rd gear more so i was thinking of trying the 50 but will this be too much with an aftermarket exhaust like a yosh?

  • Chazmagnum

Posted October 26, 2010 - 08:01 AM


13/50 W/ drd exaust and jay marmot map puts you in third gear for most corners. makes 3rd gear in the meat of the power for 50' to 65' jumps, where stock 13/48 you would be lugging it or over jumping.

  • brentn

Posted October 26, 2010 - 10:44 AM


I too am running 13/50 with the jay marmot map and it made a huge difference.

I ride trails and it made lifting the front up much easier in 1st, 2nd and 3rd for logs and puddles etc.

  • tech24

Posted October 27, 2010 - 06:55 AM


I run 13/49 and it seems fair for all conditions track or trail. I've been thinking of going to 50 but haven't really seen a need to. I always buy $20 primary drive sprokets and experiment since they are so cheap and if you don't like it your only out 20 bucks.

  • Beatcoaster

Posted October 27, 2010 - 02:26 PM


I'm running a 13/51 on the tight trails around here and it made a huge difference over the stock 13/48. Only downside is you want a 6th gear on many occasion on fire roads or otherwise...of course I did with a 13/48 as well, but not as much.

  • brentn

Posted October 27, 2010 - 02:29 PM


Yes I agree, when it comes to a logging/fire road 5th tops out quite quickly with 13/50. Engine is screaming and starts to get really hot :excuseme:

  • 95s10nj

Posted October 28, 2010 - 05:43 AM


I think i'll just go ahead and get the 50. thanks!!

Related Content


Yamaha YZ450F 2017 by Chris.GVS

Yamaha YZ450F 2017
  • * * * * *
  • 1 review
  • Last review by Tommyk_55
  • On January 15, 2017

The "going back to the other darkside" adventure... by Monk

Dirt Bike   Make / Model Specific   KTM   250/350/450/505 SX-F & XC-F (4-Strokes)
  • Hot  113 replies

Should I buy this bike? help....... by Numsa Hul

Dirt Bike   General Dirt Bike Forums   What bike should I buy?
  • * * * * *
  • 10 replies

2016 YZ450 by CaptainKnobby

Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 replies

James Stewart back on a YZ450F by YamaLink

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  47 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.