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pjohn

bike stalls frequently

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pjohn
whats up everyone
 
ok so my bike stalls too often now since i installed my M4 slip on exhaust. usually happens in first gear when I'm at a stop and trying to get going. I know our bikes have this stalling issue and I've experienced it few times but now with the new exhaust its happening frequently. why is this happening? and will an ECU flash fix this problem?
 
thanks all,
 
pete

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avanti
It remains to be seen what is going on with your particular bike, but if your data-collection is accurate in that the problem is significantly more frequent with the new exhaust, then certainly, do an appropriate reflash for your system and see what happens. It's hard to imagine that it would hurt... it might help. However, don't be surprised if there proves to be more involved. As you note, others have had stalling problems and with stock bikes. All the best!
 
Let me add a personal addendum... when I got my 07 I experienced the "starting stall" a few times but I cannot recall the last time it happened.  What has changed... really?   The only thing I can identify is my facility in riding the bike, learning the specific throttle and clutch aspects of the bike.  (btw, my bike is entirely stock in terms of running gear, so I've not had to relearn... fortunately, hehehe)
 
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r1limited
Never experianced it.
 

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yamahazaki
Does it stall while you are sitting idle? Or does it stall while you are trying to go from a stop? Just wondering.

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Beemer
Mine has done it from the beginning and what I do is make sure I'm giving it plenty of steady (no blipping) throttle before I start to release the clutch. it never stalls when I do that. From my observations, if you're a little light on the throttle when releasing the clutch it will stall at times, not every time but sometimes you can tell it started to. With this bike it kinda feels like the clutch grabs a lot, quickly. An flash tune should help, as others have claimed it did for them.
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pjohn
Does it stall while you are sitting idle? Or does it stall while you are trying to go from a stop? Just wondering.
 
 
 
 
No it doesn't stall when in idle and yes it stalls when trying to go from a stop.

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pjohn
Mine has done it from the beginning and what I do is make sure I'm giving it plenty of steady (no blipping) throttle before I start to release the clutch. it never stalls when I do that. From my observations, if you're a little light on the throttle when releasing the clutch it will stall at times, not every time but sometimes you can tell it started to. With this bike it kinda feels like the clutch grabs a lot, quickly. An flash tune should help, as others have claimed it did for them.
 
 
Yea i do the same thing now but sometimes I forget and stall at the light lol embarrassing. I need to save money for that flash

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Beemer
Mine has done it from the beginning and what I do is make sure I'm giving it plenty of steady (no blipping) throttle before I start to release the clutch. it never stalls when I do that. From my observations, if you're a little light on the throttle when releasing the clutch it will stall at times, not every time but sometimes you can tell it started to. With this bike it kinda feels like the clutch grabs a lot, quickly. An flash tune should help, as others have claimed it did for them.
Yea i do the same thing now but sometimes I forget and stall at the light lol embarrassing. I need to save money for that flash
I hear ya, I've been wanting to get a flash tune for some time now but my wallet finger seems to be frozen. It will happen eventually. A flash tune does so much more for your bike it's hard to say no to one even without any big problems. God speed on that money for you. (Can I say god?)  ;) 

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yamahazaki
Oh damn, I should've read your post when I wasn't preoccupied. It already says when it stalled. My bad.
 
Hey, you ride a car with manual transmission by any chance? I kept stalling the FZ (in stock form) in the beginning because I was treating it like a car, trying to balance the clutch optimally to save the clutch from wearing out, but then people pointed out that the motorcycle transmission is more hardy and you can put on a lot of throttle before engaging the clutch. So after knowing that, I never stalled out afterwards.
 
But it turns out, it is just a modern Yamaha characteristic because my Kawasaki, I can literally balance the clutch like it was a car and it never stalls out.
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rick
Mine (completely stock) used to do this stalling thing. After sitting at a light, just touch the throttle to get the revs up and choke it would be dead. Happened 1 time this summer out of the blue and really caught me by surprise as it hasn't happened in quite some time.
 
I suspect it has a lot to do with the air-fuel mix at idle being stupid lean. Crack the throttle open just as the pistons are at the wrong orientation (that wonderful sound and torque from the 270 degree crank also creates a big chunk of dead, non-ignition space in the crank's rotation) and just a bit more air gets in before the computer/injetcors responds with more fuel and cough, it dies.
 
If that's the case and just adding a slip-on pipe seems to make it worse, then a proper reflash to add in a bit more fuel at idle should help.
 
If the bike is still pretty new, think I would live with it a bit as the stalling does seem to go away with some miles .
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ralph
Unplugging the O2 sensor helped on mine till I got the dealer to turn up the fuel mix a bit,
unplugging the o2 did not put a error light on on mine but I would not leave it like that for
to long as it can damage the o2 sensor, if it works get a o2 sensor eliminator like this,
 
http://www.ebay.co.uk/itm/Oxygen-lambda-o2-sensor-eliminator-Complete-kit-Yamaha-MT-07/261825655578
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guylee
I never even knew this was an issue. I think my bike's stalled twice and both times were user error. Maybe it's something they fixed with the '17's.

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rick
I never even knew this was an issue. I think my bike's stalled twice and both times were user error. Maybe it's something they fixed with the '17's.
Yep, a quiet fix would surprise no one. Problem, what problem? lol. 

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jbone
I have a 2016 and have never noticed any stalling issues like described above. Maybe climate condition related?

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ralph
Some bikes just don't seem to do it,
mine only did it when mad hot say after
a long run or if shut down and restarted
a few min later, it as never done it since
it was set a tuch richer and it gets better
as the bike runs in, it can also do it on down
changes as you lift the clutch to blip the throttol
it stalls so when you let the clutch out the rear
wheel near locks as it as to spin the engine back up
this could be whats happening when riders clame
the bike as to much engine braking, they only realy
took notice of mine when I claimed it was a safety issue.
 

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