Ordered a +2 rear (47T) sprocket and new chain. - KTM Duke 390 Forum
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post #1 of 107 Old 12-25-2013, 05:15 AM Thread Starter
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Ordered a +2 rear (47T) sprocket and new chain.

Will be replacing my rear sprocket with a 47T, up +2 from the stock 45T as this will give me more torque and more pulling power in 6th gear.

Noticed that 6th gear is geared too tall more like an overdrive gear. Going 2 up in the rear will give my 6th a bit more pulling power....

Didn't want to go -1 on the front sprocket, as that will be equivalent to a +3 at the rear, which may be too much for a 390 single...though more expensive than just replacing the front sprocket, by doing this mod....replacing the rear to a nice looking aluminum sprocket and a gold chain will give my 390 more performance with "bling" factor.

Keep you guys posted when its done.
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post #2 of 107 Old 12-26-2013, 07:47 AM
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Interested on this, will be good to know how much it changes the rev range.
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post #3 of 107 Old 12-27-2013, 09:55 AM
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I like the high 6th gear.... and 1st is low enough. No plan to change gearing (and I often do so this is a 1st).
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post #4 of 107 Old 12-27-2013, 01:10 PM
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keep us updated with a review!
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post #5 of 107 Old 12-28-2013, 02:42 AM Thread Starter
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keep us updated with a review!
Will do....waiting for the rear sprocket to come in...
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post #6 of 107 Old 12-31-2013, 01:31 PM
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Originally Posted by mig390 View Post
Will be replacing my rear sprocket with a 47T, up +2 from the stock 45T as this will give me more torque and more pulling power in 6th gear.

Noticed that 6th gear is geared too tall more like an overdrive gear. Going 2 up in the rear will give my 6th a bit more pulling power....

Didn't want to go -1 on the front sprocket, as that will be equivalent to a +3 at the rear, which may be too much for a 390 single...though more expensive than just replacing the front sprocket, by doing this mod....replacing the rear to a nice looking aluminum sprocket and a gold chain will give my 390 more performance with "bling" factor.

Keep you guys posted when its done.
good call on just changing the rear sprocket. However in the future I can see some guys just going with the minus 1 up front to get a bit more pep from the get go.

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post #7 of 107 Old 01-02-2014, 03:43 PM
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did you end up receiving the rear sprocket?
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post #8 of 107 Old 01-02-2014, 04:47 PM
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How much longer till it's all done?
Would like to hear your mini review of the new sprocket
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post #9 of 107 Old 01-02-2014, 05:41 PM
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I like the high 6th gear.... and 1st is low enough. No plan to change gearing (and I often do so this is a 1st).
low enough that you can take off in second?

@mig390 keep us posted, take some pics of install if you can
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post #10 of 107 Old 01-02-2014, 06:21 PM
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You can take off in 2nd although it doesnt really like you for it.
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