quick piston question

Discussion in 'The Workshop' started by charliemcmurray5, Jul 5, 2013.

  1. charliemcmurray5

    charliemcmurray5 Member

    Messages:
    48
    i changed my piston and barrel about 2 month ago and it was running cr@p until about a then all of a sudden it wouldnt start so ive taken the barrel and piston off yesterday and noticed the top of the piston was covered in carbon really bad. could this be the reason why it doesnt run and what can cause this many thanks guys


    ps feel lost not been on the road
     
    charliemcmurray5, Jul 5, 2013
    #1
  2. Stevep

    Stevep Well-Known Member

    Messages:
    5,895
    what bike? 2 or 4 stroke?
     
    Stevep, Jul 5, 2013
    #2
  3. charliemcmurray5

    charliemcmurray5 Member

    Messages:
    48
    ohh sorry mate and its a 50 cc yamaha jog rr 2 stroke
     
    charliemcmurray5, Jul 5, 2013
    #3
  4. Stevep

    Stevep Well-Known Member

    Messages:
    5,895
    running too rich sounds like. Was the plug very blackened as well? Filthy and oily?
     
    Stevep, Jul 5, 2013
    #4
  5. charliemcmurray5

    charliemcmurray5 Member

    Messages:
    48
    yeah it was mate
     
    charliemcmurray5, Jul 5, 2013
    #5
  6. Jonnymarrw00t

    Jonnymarrw00t Moderator Staff Member

    Messages:
    3,243
    Rides:
    Piaggio Zip 05 plate
    a two stroke will always have a build up of carbon it's why they're filthy.... What is your setup and jet size ?
     
    Jonnymarrw00t, Jul 6, 2013
    #6
  7. charliemcmurray5

    charliemcmurray5 Member

    Messages:
    48
    think its just a standard set up mate dont really go near the carb as it would most likely end in tears
     
    charliemcmurray5, Jul 6, 2013
    #7
  8. Jonnymarrw00t

    Jonnymarrw00t Moderator Staff Member

    Messages:
    3,243
    Rides:
    Piaggio Zip 05 plate
    Have you changed the exhaust ? Is it de-restricted ?
     
    Jonnymarrw00t, Jul 6, 2013
    #8

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