Solution for stubborn gearboxes - Ducati Supersport 939 Forum
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post #1 of 16 (permalink) Old 10-02-2019, 11:21 AM Thread Starter
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Lightbulb Solution for stubborn gearboxes

I had the following problems with my gearbox:
- The neutral gear was very hard to hit. In 90% of the cases I couldn't get the neutral gear in.
- When a gear was engaged, the machine was difficult to move with the clutch pulled.
- The Quickshifter was choppy and sometimes I didn't hit the gear. The downshift was sometimes very rough with the quickshifter
- When the first gear was in and I started the machine, I felt a certain force that wanted to move the machine forward.

Today I had the machine at the annual service and reported these problems to my dealer. My dealer then readjusted the oil pressure in the gearbox. According to their statement it was wrong before. Please don't ask me for technical details, but my problems with the gearbox were gone. For the first time my Supersport shifts perfectly and the Quickshifter feels precise.

With this entry I want to help people who might have similar problems with their gearbox. Talk to your dealer about any incorrect oil pressure in the gearbox. Apparently you can adjust it.
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post #2 of 16 (permalink) Old 10-02-2019, 02:48 PM
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Strange description by them. Too much oil in sump or clutch needed adjusting, is what comes to my mind. Is there even an adjustment for gearbox oil pressure?

Mike

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post #3 of 16 (permalink) Old 10-02-2019, 03:01 PM
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post #4 of 16 (permalink) Old 10-02-2019, 04:51 PM Thread Starter
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Thank you for your input!

Regarding the linked thread: The problem is a lot more than just shifting to neutral. The gearbox feels like a completely new gearbox with the adjustments. Even if someone has no problems shifting to neutral, but has problems with a rough quickshifter e.g., it could be the solution. Therefore I had listed all the problems I noticed with the gearbox at the beginning.
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post #5 of 16 (permalink) Old 10-02-2019, 07:42 PM
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Quote:
Originally Posted by DucColin View Post
I had no idea. Thanks for posting.

Mike

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post #6 of 16 (permalink) Old 10-04-2019, 12:42 AM
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Thank you!!
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post #7 of 16 (permalink) Old 10-06-2019, 04:53 PM
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Good find DucColin ������
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post #8 of 16 (permalink) Old 12-12-2019, 03:03 PM
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After adjusting my clutch cable, its still seems a little more difficult than normal going into first. And neutral has become more difficult, whereas before, I seemed to not have any trouble.

Anyone else had the adjustment described on this thread done?

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2015 Ducati Scrambler
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post #9 of 16 (permalink) Old 12-12-2019, 03:17 PM
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Slightly too little free play in the cable could leave the plates dragging a bit, couldn't it? I think that would cause that kind of symptom.

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post #10 of 16 (permalink) Old 12-12-2019, 08:27 PM
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Quote:
Originally Posted by Jippo View Post
Slightly too little free play in the cable could leave the plates dragging a bit, couldn't it? I think that would cause that kind of symptom.
If the cable is too tight it should shift easy, if anything I would think. Maybe slip the clutch, but shift easy. If the cable is too loose, then the clutch wouldn’t fully disengage, making it harder to shift.

In any event, the slack in the cable is correct now after adjustment, but I still have the characteristics that were described earlier in this thread, as examples:
1) bike is hard to push when in gear with clutch depressed...usually is very easy. (But it is also a lot colder now.)
2) difficulties finding neutral, whereas before I had no problem
3) difficulties shifting into first, sometimes...although it is better since I reduced the clutch cable free play

@ChuXseN Where is your shop located, and were they aware of the bulletin, or did you need to bring it to their attention?
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