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Was wondering if anyone knows the best solution to this problem. I just got a brand new 2020 821 Stealth and its stalling out when down shifting from 2nd to 1st with the clutch in. As soon as I pull in the clutch it dies on me. Obviously, not too thrilled to have a brand new bike for a week and have it stall out 3 days out of the 6 Ive ridden it.
 
In my case, it did it a few times specially in when hot and hot outside .... this bikes comes with a very lean mix of fuel justto comply with emissions. So I installed a Power Commander V And with one of the maps that they have problem solver so far. I got the 1200 but I think the problem is the same ..... the dealer may be able to enrich you fuel a little on the low RPM so it doesnt happens
cheers
 
As far as I can tell it is not just a lean mixture thing - it used happen on my KTM 990s and they are very thirsty (but fun)
I think it is down to the light flywheel and big cylinder with high compression if you get the throttle setting slightly wrong it tried to fire too far before tdc and that stops the piston dead. It happened in my first month on my Monster 1200 too and on each bike it stopped happening after a few months... so it must be something that i started to do differently.

It seems to happen more when the road conditions were complex so
My guess is that probably, on a new bike, i was a bit hesitant and kept the throttle just off the stop in case i needed to open up again. SO I think that the throttle needs to be either totally closed or open on deceleration - not slightly cracked open like you would on some two strokes.

Either way after a month it stopped and hasn't happened again in the last 12,000 miles
 
Throckmorton .. You need to read the "Ducati taking my 2014 Monster 1200s back" thread. Believe me, you are not alone with this problem.

Still waiting to hear from anyone with a 2015 bike who has this problem. Really want to know if it is a 2014 model year problem that got fixed.
I have a 2015 model, problem of stalling on down shift until second service, not been a problem since , until today! Just service at 10 k , belt service, problems back, bike is completely stock hyperstrada 821. Think I’m taking it back to Moto Rapido to be checked
 
I have a 2015 model, problem of stalling on down shift until second service, not been a problem since , until today! Just service at 10 k , belt service, problems back, bike is completely stock hyperstrada 821. Think I’m taking it back to Moto Rapido to be checked
My guess is they advanced/retarded the timing to fix it originally...belt service brought it back to stock or missed it again...either way it needs to be corrected...easy enough to check...if it lines up...I suspect you shims are out of adjustment...they essentially have the same effect if they're out of spec
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