sr 125 backfire missfire ignition

Discussion in 'The Workshop' started by mattDNA, Feb 20, 2011.

  1. mattDNA

    mattDNA Member

    Messages:
    40
    Rides:
    aprillia sr 125
    my sr has been playing up for a while and ive finally had enough


    recently it started to bog, then my airfilter fell off while riding (was REALLY bad) then i put a malossi filter on it and was a bit better but still bogging.

    when i bought the bike it had a k n filter and everything standard but dont know if it had been upjetted so took out the 82 jet and put a 95 in (also has a pm59) and hasnt changed

    now the bikes gone bonkers when i start it up, it drives fine for bout 5 mins then it doesnt rev properly and splutters and backfires sounds disgusting and tops out around 25-30mph when i have the throttle pinned back, then when it wants to it will just shoot off fine, ill let go of the throttle and splutters and backfires, the next set off lights ill stop and the same thing will happen sometimes it wont move atall and make that brrrr sound of wen its bogging then it will react soon after :blink:

    i have no clue and would really like some help so i know what to spend my money on
    it occured to me it might be something within the ignition system? the bore? or something else please help if this has happened to someone before :beg:
     
  2. mattDNA

    mattDNA Member

    Messages:
    40
    Rides:
    aprillia sr 125
    anyone? would appriciate a reply soon as im sorting it out tomorow hopefully

    cheers :good:
     
  3. mattDNA

    mattDNA Member

    Messages:
    40
    Rides:
    aprillia sr 125
    :( :( :( any body?
     
  4. tErr0

    tErr0 Administrator Staff Member

    Messages:
    5,816
    Put an air box on it. Read all the guides about how to setup your carb. Put a new plug in it.
     
  5. grantmc3

    grantmc3 Member

    Messages:
    409
    Rides:
    piaggio nrg mc3
    make sure your auto choke is connected properly
     

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