Quickshifter failure svartpilen 401/2020

BlackFlag

BlackFlag

contributing rider
Joined
Mar 12, 2021
Messages
17
Location
Athens Greece
Hello everyone!

New here, im enjoying my 2020 401, bought 2 months ago. I have 2400 km so far. But.... 2 days ago i got a "quickshifter failure" followed by a "ECU failure" message.
I was riding on a straight, around 100km/h, on a steady throttle. It felt like the bike was trying to quickshift by itself, (like jerky fuelling...?) and then i got the message on the dash.
I stoped, switched off, turned on the bike again and it stalled a couple of times when i was about to release the clutch. I managed to get to the garage, my mechanic run the diagnostic tool but couldnt find anything wrong. The bike still gives me the "quickshifter failure" message. He sent the record to husqvarna and we re waiting for their reply.
Does anyone have something similar happened to him??
 
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Would guess its to prevent what BlackFlag is describing above.

I know that with my QS, if I turn it too sensitive a good gust of wind is enough; I am sure its no different on a 2020+ stock one.
 
I've been doing my own service, and so I skipped that. Does anyone have a manual that says how it is actually done? Maybe its all from the service computer?
 
You skipped it but didnt have any problems. ( and hopefully wont) So maybe its something else for me... I hope i find out tomorrow and i will ask my mechanic how you program the sensor too
 
Vintage Veloce said:
I've been doing my own service, and so I skipped that. Does anyone have a manual that says how it is actually done? Maybe its all from the service computer?
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Correct, repair manual says it's all done on the service computer.
FWIW I have also gotten one or two "quickshifter failures" both before and after the first service, without any other problems associated with it. It's disappeared after a reboot.
 
I still have the problem (quickshifter and ECU failure) even after the shift shaft sensor was reprogrammed .
The bike is running but it gives me this strange feeling like the quickshifter is engaging on its own. I left it at the shop and waiting for an answer.....
 
I've had the quickshift failture light come on 7~8 times when I've actually never even used the quickshifter. This started right out of the dealership with 6miles on the bike all the way up to my first 650mi service. I used the clutch everytime.

After my 650mi service at the dealer, I started using the quickshifter and the failure light never came back on since. I am now around 1800 miles.
 
Now I am no specialist, but having had the bike apart, I think there is normally some play from left to right on the shift shaft.

I wonder if there is any help of you reposition the shifter arm on on the left side to one end of the tolerance or the other (must have atleast 1 or 2 mm play once the screw is backed off a bit)

I know my after market sensor is super sensitive to adjustment, but once its dialed, its dialed.
 
BISavage said:
Now I am no specialist, but having had the bike apart, I think there is normally some play from left to right on the shift shaft.

I wonder if there is any help of you reposition the shifter arm on on the left side to one end of the tolerance or the other (must have atleast 1 or 2 mm play once the screw is backed off a bit)

I know my after market sensor is super sensitive to adjustment, but once its dialed, its dialed.
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This is a pretty old post and maybe this question has already been answered but, could you clarify where the play should be?
 
When you shift, the shift shaft rotates. If you push and pull it by hand, you may notice some slight play as the shaft slides in and out of the motor case.

When the shift arm is screwed on loose, it is able to slide on to the shift shaft more or less far from the engine case and then gets tightened on the spline.

Depending on where it is tightened, it will either be parallel to the foot lever linkage or not. When not, as you shift it will either pull or push the shaft as it rotates.

As the sensor for the quick shifter is sensitive to the shaft movement, any adjustments to the arm or linkage may make it necessary to recalibrate the sensor.
 
I had the dash tell me that the quickshifter has failed just yesterday. Mine is 2020. I shut the bike off, parked it for a day, and when I was heading home, it was all fine. I have no idea what the matter is. I looked at the linkage and it looks all good. I'll keep an eye on it.
 
J.B. said:
I had the dash tell me that the quickshifter has failed just yesterday. Mine is 2020. I shut the bike off, parked it for a day, and when I was heading home, it was all fine. I have no idea what the matter is. I looked at the linkage and it looks all good. I'll keep an eye on it.
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It has happened to me 2 times. Turning the bike off for a few minutes had fixed it every time.
 
Couple of thoughts:- Quickshifter is deactivated when clutch pulled, so if you keep throttle opening during a change the engine won't cut and ironically, you get a jerky upshift.
It may also be deactivated on closed throttle to ensure engine doesn't cut out on downshifts? Old school bikes like me have hard time breaking habit of shutting off when upshifting without clutch, his may reduce the rev-matching effect? Certainly on high throttle Quickshifter works smoothly, but flat-out I get the odd false neutral, although reduced this by ensuring lever adjusted to sit hard onto boot, so upshift is positive. Had 'Quickshifter Failure' and 'engine' sign a couple of times, dealer found no issue. Early on after collecting new bike had intermittent regular cut outs, on-off power at half second intervals,, recovered per the Husky Svartpilen Warranty. Dealer found nothing wrong, this occurred again after a few weeks but had traffic camera running and this recorded the event, so sent email to Husqvarna UK. Dealership (Appleyards Keighley) supposed to collect bike on instruction from HQ UK but didn't, so will push this at service due August, they were too busy to fit me in before that.
 
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