Gearing. Ktm 450 Exc

Discussion in 'Thumpers' started by shark93, Dec 1, 2012.

  1. shark93

    shark93 Adventurer

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    Hey guys, Need some experience here. I have an 2006 Ktm 450 exc, very happy with it Ive just got a question about the gearing.

    I had a 14/52 setup on there, was changed to 14/49. Feels a bit different to ride and it hates going on the back wheel now. What do you guys suggest running, I do mostly fire-trails and single track in pretty hilly country.
    I looked up ratios
    14/52 is 3.71
    14/49 is 3.50

    So Im guessing the bigger on the back means it slows you down but increases snappyness? I don't really do much road work so having a lower top speed wont worry me one bit, even 120 will be fine. At the minute 140 isnt a problem to get to but i dont really need that excessive speed, rather use the power elsewhere

    Thanks
    Tom
    #1
  2. dhally

    dhally Hammerhead

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    Yes that is my experience too. For tight trails I like to gear them down so I can walk alongside the bike without slipping the clutch. As long as top gear still works OK. Although sometimes that makes 2nd gear too low for normal slow trails, but 3rd gear too high. Depends on the gear spacing and how fast you ride.
    #2
  3. Off the grid

    Off the grid Unsmooth Operator

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    I ran 13/50 and was very happy. 1st gear was slower than walking speed up to triple digits in 6th gear.
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  4. shark93

    shark93 Adventurer

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    13/50 would be close to 14/52 yeah?

    So Would it be worth going upto 53? At the minute on a nice long fast hill climb, 3rd gear does really well, but once i click into 4th she just cant hold the revs and I'm back into 3rd again, Changing back should help this right?

    I had the top end rebuild, so I haven't ridden it on 14/52 with the new power.
    Cheers
    #4
  5. Off the grid

    Off the grid Unsmooth Operator

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    I wouldn't be afraid to hit the rev limiter in 3rd. Fuck, I don't think I ever have on mine.....scary proposition. :huh
    #5
  6. shark93

    shark93 Adventurer

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    haha slighty confused by what you mean there?
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  7. Off the grid

    Off the grid Unsmooth Operator

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    Meaning I haven't met a hill in existence that an RFS bike would not wheelie up in 3rd gear. Don't be afraid to get those revs up.
    #7
  8. kateean2

    kateean2 Adventurer

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    Great thread,Thank you to all those who posted...., keep them coming : )
    [​IMG]
    [​IMG]
    #8
  9. shark93

    shark93 Adventurer

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    haha im going to blame to gearing it hates going on the back wheel now. maybe in 3rd if I really give it heaps.
    maybe I should goto 13/50. instead of 14/52
    excuse my lack of knowledge, but having an RFS bike is a good thing?

    13/50 =3.846
    14/52 =3.710

    So 13/50 is goign to be very nice, you would recommend it ?
    #9
  10. Moto Vaquero

    Moto Vaquero Trail less traveled

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    A 13t front will wear your chain slider out much more rapidly than the 14. The 14-52 is a good all around combo for the 450. 14-50 for the 525.
    #10
  11. Steveman

    Steveman Been here awhile

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    14/52 will work perfect :1drink
    #11
  12. 2Stamp

    2Stamp Been here awhile

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    This thread is timely! I am picking up a '06 450 exc tomorrow. It will be interesting to see what sprockets it has right now.
    #12
  13. shark93

    shark93 Adventurer

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    Hey, Cheers Guys ill take that into consideration. Im going to buy a few cheap sprockets and give them a go till i find whats nice, Would I be silly going say 14/53 or so, Really after the down low grunt,

    2Stamp, What did the Bike come with ? How do you Find it?

    Cheers
    #13
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  14. 2Stamp

    2Stamp Been here awhile

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    It has a 14/50 setup. the numbers will be scribed somewhere on the sprocket. You might need to clean the grime off them to read.
    #14
  15. fridayflash

    fridayflash Adventurer

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    bit of a thread dredge here, but....im just considering the same questions. my 450 exc in offroad trim is running 14/50 and thats fine..it hangs on in the tight steep climbs but i feel the 13/50 set up will tighten her up a bit and let it plonk along a little slower in 1st where needed. conversely, im looking to fit my road kit and go for a bit of DS riding...ive ordered a 45T rear, and ill try that with the 14T currently on the front and see how that is at open road speed, if its a bit low ill fit a 15T. the 45T at rear could also be pushed into dirt riding too..if a throw a 12T up front to bring the gearing own:D
    #15
  16. snare

    snare sittin and breathin

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    I've got the 14/50 stock combo on my 400, been thinking of getting and carrying a 13 tooth cs sprocket to swap in for the long (often multi day) off road trips.
    #16
  17. Navin

    Navin Long timer

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    Id swap my gearing from 14/50 to 13/50 depending on the riding. Open scrambles or MX the 14t. Tight stuff the 13, and that was on a 610cc 530.

    Get a 13/14 set for up front and a 50 or 51 out back. The cheap are like $14.
    #17
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  18. RideFreak

    RideFreak Torque Junkie

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    There's really no benefit to going with a 12 on these bikes, it will wear out your chain sliders and the chain pretty quick. Like Navin said, get a 13 and 14 and figure out which rear works for the entire range of riding you do. Most guys are fine with the 13/50 for tight stuff and 14/50 when they have to hit the road. For a long pavement ride I might consider a 15 front although I try to avoid those situations.
    #18
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  19. nick2ny

    nick2ny Been here awhile

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    Just bought a 2006 KTM EXC with supermoto wheels and enduro wheels. What's a good start for gearing? I am about to take a ten day trip all off-road in tunisia... And when I get back want to ride mostly in-city commuting, then some supermoto, some mx...

    Thanks-
    #19
  20. 75' Forty

    75' Forty Adventurer

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    Google online gearing calculator. You can play with sprockets and get top speed to help decide on what you want.

    If you can't find one, look up the ratios in the trans and the primary reduction and I can email you over a copy of one I built when I was building our race car.
    #20