General topics » Gear Shift Assist Pro issue - cutting out

Hi all,

Having a bit of a weird issue with my RS. The bike is 5 weeks old and has done about 1200 miles, had its first service. Its a sport SE, so got GSAP etc.

So, here is the issue, changing up through the gears when accelerating hards using GSAP, the bike goes into the next gear and then momentarily cuts out, then it just carries on. It doesn't do it every time I change but if I ride around 60mph in 4th, accelerate hard and change to 5th around 75-80mph it will usually do it. It usually does it 4th to 5th but has done it in lower gears too.

So I took it in to the dealer, they had it a week, rode it and it did it once on them. I can "make it" do it (rather I couldn't) pretty much at will by doing the above. They reset the adaption, adjusted gear level (it was fine where it was) and gave me it back. 4 miles from dealer, did it again.

Now BMW have it back again and have leant me their demonstrator, identical to mine! I get a mile from dealer last night, give it some beans and change up to 3rd, bang! that one does it.

Questions:

Is anyone else experiencing this? I saw one thread mention it once.
Is it a stock fault?
Am I doing something wrong? My XR had a GSAP and worked flawlessly.
How could I be causing this if it is me? (I have ridden bikes for over 35 years, I am not an amateur (though may be rubbish at changing gear it seems

Really appreciate any pointers before I go back to BMW and tell them this bike does it as well (the common link being me, and that it is an RS).

Thanks in advance.

Carlos.

Not very helpful but it's not happening with mine (yet!)

So when you change up do you keep the gear lever in the upper position until the gear change is complete or are you just clicking it up and returning the gear lever to its central position immediately. I occasionally have experienced a slight, and it is only slight hesitation when changing up. The manual does say hold the gear lever in the upper ( or lower if changing down) position until gear change is complete, maybe you are being a bit quick releasing the gear lever on some changes, perhaps try deliberately keeping the lever in the upper position until acceleration is restored before letting the gear lever go.

I’m probably the one other thread you saw on this. For me it only happened 2nd-3rd and sometimes the motor would cut out and cut back in without shifting. I took it to the dealer and they replaced the shift assist under warrenty. I haven’t had an issue since.

I haven't experienced that issue with my April 2015-build RS. The GASP works well, except for shifting from first into second and into third, when it lurches. The rest of the up-shifts are much smoother and downshifts work perfectly, especially when shifting into first and second gears. I have never had any cutouts when shifting. Perhaps your GASP shifting technique is not making it happy? Being that it is designed by Germans, you do have to follow the rules of course.

Zitat von wessie im Beitrag #6

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I do not get the symptoms described on the original post on my 2015 RS but I can confirm that the GSAP on my 2016 S1000XR is a lot smoother - you can use it as soon as you set off from 1-2 upwards. It does not matter whether you short shift or wait for the shift LED to start flashing on upchanges.

The RS was my first bike with GSAP and shifts did improve after I became more accustomed to using the system so technique is important but it is a matter of experimentation to find the optimum revs for each shift.

Perhaps GSAP is better suited to higher revving bikes live the S1000 inline 4?

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If I understood well what is happening, I started witnessing this when I changed my boots. This new pair had me re-allocate my feet on the peg, so the lever movement was more "positive".

Carlos, i think you’re right, you’re just rubbish at changing gears, hope the next 35 years shows improvement !!

Thanks for the replies so far.

You know, I don’t know if I even think about it when changing up, think I just hit it and release, I’ll give it a go today and report back.

What is this word “manual” of which you speak? I am not familiar, do you read it? 😊

Thanks

Hi Carlos, manual in this context is the RS owners handbook.

No, not seen any issues, I am conscious not to rest/touch my foot on lever prior to and after changing gear. How aggressively are you riding before shifting up e.g. what revs? (and assuming you are in Dynamic mode?)