09 crf 450 gearing ?

stock is 13 / 48 at.2708. smooth & electric , 14/52 at .2692 more torque but more shifting , i need between that ? is it possible to find the difference!

We run 13 50 on our 06 250 and it great out of

The corners yet still plenty of top end!

the reason honda geared the bike up in 04 from 13-49 to 13-48 was to try to calm down the power delivery when they also lightened the flywheel and bumped the compression ratio. For me, when I bumped the compression ratio, it took me a while to learn to be easier off the corner to not light the rear tire up.

when i bought the bike it had 14/52 it was great on a tight track. but on a larger mx track it used a lot of shifting. i tried 13/48 stock it was so silky smooth it would not tire me out plus felt i could feel longer powerband & less shifting. how is it with 13/49 . do you feel more shifting is needed ? 13/48-.2708  , 14/52-.2692 , 13/49-2653 . if the math is right 13 /49 will have even more torque. this is on a 09 fuel injection model , they dont have the long top end over rev like my 06 & 04 did! i,m trying to elongate the power band & gain more power in the same time!

What is stock on 09 450? our 11 250 stock is 13 49my son prefers this , we tried 13 50 on the 11 but he did say he had to shift a little sooner but it pulled out the corner leading to jump better , the 06 is 13 51 and we put the 50 on there and he could run it out further , we ride outdoor mx so it's a pretty good compromise I think!

stock is 13 / 48 at.2708. smooth & electric , 14/52 at .2692 more torque but more shifting , i need between that ? is it possible to find the difference!

 

13/48 = 3.692 (Stock ratio)

 

13/49 = 3.769

 

14/52 = 3.714

 

I've ran all 3 set-up's on my 09 and I like them all. None are really bad, depending on your specific riding style on/off the track. I personally prefer the 14/52 ratio for mx, it splits the difference between the stock and 13/49 gearing. Pulls like a freight train, and more speed than you could possibly want unless you're Ryan Villopoto. 

 

Hope this helps.

Yea man thanx , going one up front is like adding three to the rear right ,just seems like a drastic change instead of small incriments , we have one guy that races with us that runs a 14 up front I just have never tied it

just finished put on 14/52  i,ll try it out . it's easier to change latter by leaving the longer chain on this set up. if i fell it is to busy , or it tires me out ,i can always cut a link 

& use 13/48. thanks all.

Report back , cool!

Yea man thanx , going one up front is like adding three to the rear right ,just seems like a drastic change instead of small incriments , we have one guy that races with us that runs a 14 up front I just have never tied it

 

It's really not that much of a change at all with the 14/52 setup due to the bigger "52" on the rear.. the ratio is actually between the stock 13/48 and 13/49. It provides a little bit more pull without losing the speed you get with the stock 13/48.

14/51 is the ticket!

Hmmm , always looking for that edge!

14/51 is .2741 smoother than stock! it does like falcon 1 stated it really depends on rider , style & conditions. im in nj ,. i like sandy loam . great traction ,but it can steal power. hard to believe but true. 13/48 is great but i like to short shift to save valves & saves my strength. but some times i dont get the lift i need to clear some triple jumps . it can hurt when your 52. 14/52 is like a half a tooth step in gearing.maby i'm getting lazy cause stock was actually a pleasure to use! i'll find out this weekend weather permitting  .

you can hear the slight bog with 13/48.

Edited by 48 on 06 crf450

With my 08, after the 13.5:1 jewelry piston I went with 14/49. It pulls really hard but can make it for a 3 hour hare scramble. The goal wasn't more power but to actually pull 2nd a bit longer before getting to third as well as make 1st even remotely useful. 1st on stock gearing is good for riding from the pits to the line, way to much torque for virtually anything. If I were racing mx, I would say I would still stick with 14/49 on my hometrack, start in second get to third and leave it alone. The transmission may be different on yours but on mine 2nd and third are awful close with larger gaps going to fourth and fifth.

I've used 13/49 on (4) CRF450's with stock motors & seems like a happy medium for me.

well i tried 14/52 today. it pulls ,great, i did feel more shifting . also being the first day on this gearing , it's something i'll need to get use too! it does put the engine in the meat of the power band instantly , but brings shifts on quicker. only lap times will tell which is truly faster! also with bigger sprocket the location of the rear wheel was about 3/8 inch shorter in wheelbase. which intern changes the balance & sag settings. the gearing  ratio is only 1/2 tooth but the chain length must be 5 links longer to keep sag the same. now i see why the teams are always testing. 

great little chart thanks!

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