Duke starts to wobble / bounce at higher speed - Page 3 - KTM Duke 390 Forum
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post #21 of 41 Old 05-04-2016, 02:31 PM Thread Starter
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Just bought the Allballsracing upper and lower direction bearing kit from a french seller : 31,40 euro delivered ! Great ! Will be here end of this week .
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post #22 of 41 Old 05-04-2016, 03:21 PM
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If the label is in indecipherable Gaelic, it has to be mysteriously good! Wish I could taste it, Kinky!

Cheers, Will

"If you don't know where you're going, you might wind up somewhere else."
--Yogi Berra

2015 390 Duke
1980 Moto Guzzi V50 II cafe racer
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post #23 of 41 Old 05-04-2016, 03:23 PM
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Good news, Yves! Now you're all set to be the Guinea Pig...er, uumm, the pioneer, again!

Cheers, Will

"If you don't know where you're going, you might wind up somewhere else."
--Yogi Berra

2015 390 Duke
1980 Moto Guzzi V50 II cafe racer
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post #24 of 41 Old 05-04-2016, 04:41 PM
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Quote:
Originally Posted by Diploman View Post
Neither 390 variant uses bearings at the swingarm pivot. Instead, a set of inner and outer bushings is fitted at each side.
Ah, ok.

No surprise they went for a cheaper option than bearings.

Sounds like they went for an EVEN cheaper option than 'regular' bushes and saved a few more Rupees by not greasing them
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Less is more - You can only use 150hp .001% of the time, but you can use 150kg 100% of the time ...........


2015 390 Duke / 2001 KTM 640 Duke2 / 1994 DR350 (in bits)
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post #25 of 41 Old 05-04-2016, 08:31 PM
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https://www.ktmduke390forum.com/forum/ktm-duke-general-discussion/24618-duke-starts-wo

Quote:
Originally Posted by Diploman View Post
If the label is in indecipherable Gaelic, it has to be mysteriously good! Wish I could taste it, Kinky!
That could certainly be arranged- hope to have the Flying Nun on the road next week. Since my ancestors are Scots- perhaps Ya could tell me how to sneak a haggis past the TSA?
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post #26 of 41 Old 05-05-2016, 03:38 AM Thread Starter
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Good news, Yves! Now you're all set to be the Guinea Pig...er, uumm, the pioneer, again!
Well , it should not always be the same ones to function as guinea pigs .. er pioneers , no Will ? You have done your fair share .
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post #27 of 41 Old 05-05-2016, 05:42 AM
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a small rock and the wheel or tire could have permenately bad alignment.

Before checking the bearings, just take out the wheels and have them for aligment check. If the wheel and handlebar spins ok without funny noises, the bearings sould be ok.

duke 390 wheels are not the most indistructable wheels on the market....
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post #28 of 41 Old 05-05-2016, 02:31 PM
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Is it confirmed the headset bearings are the problem?

Sent from my MotoG3 using Tapatalk
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post #29 of 41 Old 05-09-2016, 09:24 AM
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I had a very similar experience and although the rear tyre looked fine tread-wise, it was a little squared off so I changed it and that seems to have worked. it was on the original Metzeler M5 and had done about 2800 (fast) miles. Worth a try...?
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post #30 of 41 Old 05-09-2016, 09:44 AM
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https://www.ktmduke390forum.com/forum/ktm-duke-general-discussion/24618-duke-starts-wo

Plant your bike on something sturdy, (so that both wheels are off the ground)- start the motor,put it in gear, and point a strobe light at the rear wheel- you will be amazed at what this shows you.
With the handlebars rigidly held, spin the front wheel as fast as you can, and strobe it also. (I read about this in one of the American bike rags, many years ago.)
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