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Thread: Rsv4 2014 stutter - misfire at low rpm

  1. #1
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    Rsv4 2014 stutter - misfire at low rpm

    Hi, I have a question if this is normal...When i'm riding at low rpm at constant throttle ( 2-gear, ''50kph-city road'' ) bike starts to stutter, backfires , sounds almost like it's misfiring...
    But when you give it throttle it goes normal and also idles normal (1500rpm) , starts normal...

    Does anybody have same problems or is this normal?

    Thanks

  2. #2
    apriliaforum expert comfysofa's Avatar
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    Check and clean primary injectors?

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  3. #3
    apriliaforum expert Proctologist's Avatar
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    The issue you described is not normal.. also, more details needed; miles, upgrades, service visit & etc.







    Today:
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  4. #4
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    O had a problem very similar to this when I got mine out of storage. Prior to storage the bike worked fine so I put it down to old fuel and maybe a gummed up injector. Put fresh fuel and injector cleaner in and the problem persisted.

    Mine used to be hard to starts but would idle and would stutter and sort of clear it’s throat and then go but backing off the throttle would backfire like crazy. I whipped my plugs out and checked they work in my dirt bike and checked the gap. Put them back in and the bike became hard to start and idle.

    So even though I had a spark I just bought new plugs and fitted them and then my bike was back to normal and acting as it should.

    Hope this helps.

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    That could be the case, bike was stored in garage for approx. 2 years, i changed the oil and put in new fuel ( tank was empty-light was on ) bike has ''14900km''...

    I acts like you described, it's clearing it's throat...starts normal, idles normal ( when you give it throttle when stationary its ok), but when you are driving and you let off the throttle it backfires (which sound great btw.. ), but when you get back on the throttle it develops sort of a stutter but then is back to normal, until you let off the throttle aggain.

    Could be the spark plugs but the feeling is different, will check them anyway, and probably change them....

    Thanks for reply

  6. #6
    apriliaforum expert plocky's Avatar
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    Quote Originally Posted by Kudry111 View Post
    That could be the case, bike was stored in garage for approx. 2 years, i changed the oil and put in new fuel ( tank was empty-light was on ) bike has ''14900km''...

    I acts like you described, it's clearing it's throat...starts normal, idles normal ( when you give it throttle when stationary its ok), but when you are driving and you let off the throttle it backfires (which sound great btw.. ), but when you get back on the throttle it develops sort of a stutter but then is back to normal, until you let off the throttle aggain.

    Could be the spark plugs but the feeling is different, will check them anyway, and probably change them....

    Thanks for reply
    yep do yourself a favour & change those spark plugs.
    I've chased many fueling issues only to find out it was the spark plugs. Some not so old plugs too.
    2015(16) RSV4 RR Ascari Black 201HP

  7. #7
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    Quote Originally Posted by plocky View Post
    yep do yourself a favour & change those spark plugs.
    I've chased many fueling issues only to find out it was the spark plugs. Some not so old plugs too.
    First i will change spark plug and then we will se...

    Thanks

  8. #8
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    Kudry I was really sceptical it was the plugs as I had a spark but it was the cheapest thing so I had nothing to lose. Couldn’t believe it when it fixed it so hopefully will be the same. I only got the normal plugs standard plugs 24. Had that no5 worked it was going into a shop...but thankfully she returned..
    Hope it works for you
    Last edited by marc.r1; 08-14-2019 at 04:38 AM. Reason: Autocorrect......

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    Quote Originally Posted by marc.r1 View Post
    Kudry I was really sceptical it was the plugs as I had a spark but it was the cheapest thing so I had nothing to lose. Couldn’t believe it when it fixed it so hopefully will be the same. I only got the normal plugs standard plugs 24. Had that no5 worked it was going into a shop...but thankfully she returned..
    Hope it works for you
    I'm getting NGK CR9EIX - iridium plugs, and hopefully it will be good.

  10. #10
    apriliaforum expert comfysofa's Avatar
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    Just put those in mine 2 weeks ago...

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    Quote Originally Posted by comfysofa View Post
    Just put those in mine 2 weeks ago...

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    Is everything ok, any problems? I'm thinking because the recomended plugs are CR9EKB

  12. #12
    apriliaforum expert comfysofa's Avatar
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    Nope... Running fine. All good.

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  13. #13
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    CR9EB is what I put in mine

  14. #14
    apriliaforum expert plocky's Avatar
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    NGK CR9EIX - iridium plug been in mine for 9000km. All good.
    2015(16) RSV4 RR Ascari Black 201HP

  15. #15
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    Crisis averted... One spark plug was bad.. Thanks all for help

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