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Thread: 2005 CRF450X Street Sprockets?

  1. #1
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    Default 2005 CRF450X Street Sprockets?

    Hey guys, I recently purchased an 05 CRF450X and it came with a 14/48 setup, I find it pushes fairly hard keeping around 60mph. I want to be able to ride 60 without running it dead but I do not want to gear to tall were I wont be able to have my fun *wink* *wink* What sprocket sizing is fair all around, I am looking for a nice balanced powerband, not just top end. Some guy mentioned he was running a 13/37 any input?

  2. #2
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    I ran with 15/50 and the bike toped out at 90mph. The bigger sprockets the faster it goes, dont have the same acceleration thoug

  3. #3
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    My bike will be running 13/42 when my project is done. So I would keep the stock front sprocket on there, and just switch to a 42 in the rear. Try it out!
    2007 YZ250F (For sale)

  4. #4
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    Run a 15/44 on mine. Works great. Anything close to a 3:1 ratio should be fine. I've even jumped on I75 for a few mile stretch between exits.
    ______________________________________________
    2012 Triumph Tiger 800 ABS
    2008 CRF450X-SM

  5. #5
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    I'm runinng 15/40 on my 03 450r at the moment. Going to switch to 14/45.

    http://www.gearingcommander.com/
    Live free or die!

  6. #6
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    Sep 2008
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    I run 15/43, provides the speed and acceleration I desire.
    04CRF450R
    supermoto'd
    street legal

  7. #7
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    Apr 2010
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    Rapid City, SD
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    If your running 15/45, how many links are you running on your chain?

    Wondering if I need to buy a new chain after getting this sprocket setup.

  8. #8
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    Had 13/51 on mine stock and could barely keep up with 45mph traffic while over-revving. Switched to 14/42 and it will now run 65 to 70 steadily on the freeway without any issues and has been up to 95+ on highway twisties. Still wheelies pretty much at will up to 2nd gear and with some planning/momentum in 3rd. You will definitely need a new chain set-up, mine ended up being 110 links (including the masterlink). I wouldn't pre-cut the chain. Set it all up and run the chain loose over the sprockets. Measure TWICE (or even three times) how much length and where to cut it. Take my word, you DON'T want to cut it too short and have to buy another chain or press the links back on. Adjust chain, lubricate, ride your ass off while grinning insanely!
    Last edited by 450XSM; 08-02-2011 at 11:04 AM.
    05 CRF450XSM
    09 KTM 690SMC (Gone but not forgotten)

    I feel the need for liberation through acceleration.

  9. #9
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    Quote Originally Posted by joeojoeo View Post
    I ran with 15/50 and the bike toped out at 90mph. The bigger sprockets the faster it goes, dont have the same acceleration thoug
    Let's amend this statement a little to read:
    The bigger the countershaft sprocket the faster you go, and the smaller the rear sprocket the faster you go. Do both, like I did, a larger countershaft and a smaller rear and you'll be able to ge even faster.

    I lost some low-end grunt but not as much as I was expecting, it still wheelies in 1st-3rd pretty easily, and the extra top end I got was well worth the trade-off .
    Last edited by 450XSM; 08-02-2011 at 11:08 AM.
    05 CRF450XSM
    09 KTM 690SMC (Gone but not forgotten)

    I feel the need for liberation through acceleration.

  10. #10
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    Houston TX
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    Maybe you guys can help me out. I am not sure what gearing i need for my 06 crf450x.. I do not want to sacrifice low end torque..no more than 65-70 mph top speed. What gearing should i use?

  11. #11
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    Stock gearing on my 450X has a top speed around 75-80. but the RPM's are at like 8-10 grand.

    So stock should do ya fine.

  12. #12
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    Quote Originally Posted by BadApple View Post
    Maybe you guys can help me out. I am not sure what gearing i need for my 06 crf450x.. I do not want to sacrifice low end torque..no more than 65-70 mph top speed. What gearing should i use?
    See post #8
    Last edited by 450XSM; 08-08-2011 at 06:02 AM.
    05 CRF450XSM
    09 KTM 690SMC (Gone but not forgotten)

    I feel the need for liberation through acceleration.

  13. #13
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    Houston TX
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    Quote Originally Posted by 450XSM View Post
    See post #8
    Thanks...I think i am going to go with the 14/42 mentioned in your post. I can always switch latter if i don't like it. Have to start somewhere.
    Last edited by BadApple; 08-08-2011 at 08:56 AM.

  14. #14
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    So Cal
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    Right now i am running a 15/48 on my 06 450x and it cruises at 55 at like 5000-5500 with a bunch of pull off the bottom..not much clutch needed to get it going either. Its a pretty great all around setup for cruizin the streets as well as havin a little fun but im thinkin about goin to a 41 rear for a little bit "less stressful" high speed, long distance riding. Any one run this gearing or have any input? Good idea? Bad?

  15. #15
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    Someone ran a 13/44? Any experience with it?

  16. #16
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    May 2009
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    I just motarded mine and the sprocket on the rear is a 40 and I still have the stock 13 on the front.
    '08 CRF-450X

  17. #17
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    I now have 15/42 on my SM...it is a great street/highway gearing for anyone looking for an overall type of setup. I've heard of many people saying that you have to ride the clutch to get going with this size of a rear, but I really am not having much issue with it. It cruises really well at 55-60; its pretty damn good. If i couldve gotten a 43 rear i think it would have been the best personal combo for some one that will be cruisin for extended periods of time at 55+, but thats a pretty hard tooth size to find lol. Definately Happy with it tho!

  18. #18
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    I've got 14/45 on mine. It'll blast up into the 70's if I need to pass someone and it'll sit-down wheelie in 4th.

    It's not comfortable to maintain at interstate speeds, but it's not an interstate type of bike.
    2006 CRF450X - plated and 'tarded
    2009 CBR600rr

  19. #19
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    Mar 2011
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    Battlefield, Missouri, United States
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    16/49 right now.....wheelie machine! Super fast!
    09 SMR510
    04 CR250 Woods
    03 CRF450 Sumo

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