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Author Topic: "Pop" on rev'ing  (Read 887 times)

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Offline bonne

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"Pop" on rev'ing
« on: March 13, 2022, 05:27:11 »
I have noticed a few occasions where my 21.000 KM 1050 "pop"s (sound) when opening the throttle after idleing. Well... actually maybe you wouldn't call it idleing, but if I pull the clutch without engaging it immediately right after, I often flip the throttle, so maybe this happens before actually reaching idle RPMs.

I recall my 650 from 2017 did the same only this would stall immediately after.

I don't think it is backfire... I guess it is more like coming from exhaust...?
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Offline The Doctor 46

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Re: "Pop" on rev'ing
« Reply #1 on: March 13, 2022, 11:10:42 »
Hi Bonne. I'm no mechanic but it sounds like one of three things. Air getting in to your exhaust, faulty injector or and I think most likely, start your bike then put your helmet on, zip up your jacket and put your gloves on. Then you will have noticed the REV's drop. I think that extra time to warm the engine or at least wait for the choke to close.You know this anyway don't you.  :)
Good luck with it  :thumb:
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Offline bonne

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Re: "Pop" on rev'ing
« Reply #2 on: March 14, 2022, 19:31:12 »
Not sure I understand what you mean?
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Offline The Doctor 46

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Re: "Pop" on rev'ing
« Reply #3 on: March 14, 2022, 20:38:00 »
Sorry. To put it simply, are you sure you're not pulling away before the engine is warmed up enough to deactivate the choke? Having said that, I don't think that is your problem because today I started my bike and rode off straight away and it run sweet. Someone more clever than me may be able to help more. Sorry for the confusion.  :thumb:
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Online Gert

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Re: "Pop" on rev'ing
« Reply #4 on: March 16, 2022, 06:10:53 »
Any chance that this could be due to unburnt fuel in the exhaust. Rich mixture + flip the throttle?
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Offline Rixington43

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Re: "Pop" on rev'ing
« Reply #5 on: March 16, 2022, 09:21:53 »
Very occasionally my vee coughs through the airbox if I try to blip on downshift having allowed the revs to drop really low in the previous gear. I think possibly going from what I assume is zero fuelling when engine braking to suddenly asking for revs from very low rpm leads to a momentary stall. It always picks straight back up again so I've not worried about it.
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Offline bonne

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Re: "Pop" on rev'ing
« Reply #6 on: March 20, 2022, 20:29:24 »
That sounds like my issue, Rix.
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