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RyhnoBurger
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« on: October 14, 2010, 07,34:20 AM » |
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Hey guys, wondering what gearing i should run on my 05 250 exc as i have a top cruising speed of 70km, down low is like a bullit but befor i start spending money on pipes and stuff id like to know any proven ratios?
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Peter r
Full Member 2013/2014
Posts: 2482
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« Reply #1 on: October 14, 2010, 07,40:49 AM » |
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Tell us what gearing you have on it now ?? From Memory 13/50 or 13/52 sounds like the go. Check this out: http://www.ktm.com.au/bike.php?bike=221 Then click on Technical Data, then look at Final Drive.
Pete |
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« Last Edit: October 14, 2010, 07,46:10 AM by Peter r »
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Serge C
Full Member 2013/2014
Posts: 3011
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« Reply #2 on: October 14, 2010, 08,09:36 AM » |
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I run 13/52 on my WR 250.
Works well on the dirt, but I wouldn't want to ride to Sydney with it!
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"He may look like an idiot, he may sound like an idiot, but don't let that fool you...he really is an idiot!" - Groucho Marx.
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Wade E
Full Member 2013/2014
Posts: 350
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« Reply #3 on: October 14, 2010, 11,16:07 AM » |
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14 - 48 works for 250EXC
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Brad
Guest
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« Reply #4 on: October 14, 2010, 08,14:33 PM » |
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Same on my Wr250 13/52 does 80Km/h no issues
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« Last Edit: October 14, 2010, 08,16:32 PM by Brad »
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Willbar
Full Member 2013/2014
Posts: 2825
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« Reply #5 on: October 14, 2010, 08,44:25 PM » |
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If you are new to this pass time, stick with 13 on the front and anywhere from 49 to 52 on the rear if you are planning on doing the average AMTRA ride. For more open fast flowing riding you can drop down on the back.
1 tooth difference on the front sprocket is equivelent to two teeth on the rear. Will
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You don't stop laughing because you grow old, You grow old becuase you stop laughing.
Never take life seriously.... Nobody gets out alive anyway.
Current Rides
2010 KTM 690 Duke
2011 KTM 300 EXC
2000 KTM 125 SX
2001 KTM 300 EXC
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Milktoast
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« Reply #6 on: October 15, 2010, 09,05:23 AM » |
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Are you talking the two stroke? My 300 came with 13/50 gearing which was a bit "snappy" if I wasn't carefull with the throttle. Top speed wasn't very high either,about 80kph
(i wasn't game to wring its neck)
Gone to a 14 on the front mainly to smooth it out a touch,but also getting higher top speed by about 20kph.
Not to mention slightly more fuel range.
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Aaron
Full Member 2013/2014
Posts: 465
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« Reply #7 on: October 17, 2010, 11,52:58 AM » |
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If it's a 2 stroke the stock 13-50 gearing works well for most riders. With this gearing it will have a top speed of about 130km/h. I will also cruise on 100km/h without any problems(sometimes my pipe turns blue  ). Some riders run a 14 on the front, but I find this too tall as I am not a fast rider. And Will, do your maths. One tooth on the front is between 3 or 4 teeth on the back. Closer to 4 really. |
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Single track is living. Everything else is just waiting.
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Aaron
Full Member 2013/2014
Posts: 465
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« Reply #8 on: October 17, 2010, 11,56:15 AM » |
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Are you talking the two stroke? My 300 came with 13/50 gearing which was a bit "snappy" if I wasn't carefull with the throttle. Top speed wasn't very high either,about 80kph
(i wasn't game to wring its neck)
Gone to a 14 on the front mainly to smooth it out a touch,but also getting higher top speed by about 20kph.
Not to mention slightly more fuel range.
Come on Mr Toast That bike will break 100km/h in 4th gear. Give it the beans man.  And going from a 13 to a 14 tooth front should add 10.0769km/h to your top speed. Roughly! |
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« Last Edit: October 17, 2010, 11,59:25 AM by Aaron »
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Single track is living. Everything else is just waiting.
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RyhnoBurger
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« Reply #9 on: October 18, 2010, 10,20:06 AM » |
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wow what a reply, thanks guys. Im trying out a 14 50 to start with and will see how it goes this weekend at toolarook. Cheers fellas.
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