How do you install a new piston?

Discussion in 'Motorized Bicycle General Discussion' started by justthisguy1292, Dec 18, 2009.

  1. justthisguy1292

    justthisguy1292 New Member

    Joined:
    Jan 16, 2009
    Messages:
    39
    Likes Received:
    0
    I recently blew a piston ring and it destroyed my piston and jug. i have replacements but i don't know how to put the new piston in. can someone explain how or tell me where a thread is that can explain it? I'm sure this has been explained several times.
     
  2. Ghost0

    Ghost0 New Member

    Joined:
    Mar 7, 2008
    Messages:
    764
    Likes Received:
    0
    Pull the head and remove the jug. Remove the retaining clip from the upper rod pin in the piston. Remove the rod pin. Assemble in reverse order. OK I made that sound a littler easier than it is but that is pretty much it.
     
  3. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

    Joined:
    Jan 8, 2008
    Messages:
    11,529
    Likes Received:
    1
    Make sure you line up the anti rotation pin in the ring groove with the end gap of the ring.
    Use some motor oil on the ring/piston when you replace it into the cylinder.
    Use an extra set of hands to let the cylinder down onto the piston while you hold the ring in place unless you have a ring squeezer.
     
  4. NunyaBidness

    NunyaBidness Active Member

    Joined:
    Jun 29, 2008
    Messages:
    1,062
    Likes Received:
    1
  5. "the prussian" Shop Dogs

    Joined:
    Jul 15, 2009
    Messages:
    620
    Likes Received:
    0
    lots of hardware/small motor shops have ring compressor sleves, I work alone alot and there worth the 8-10 $ one costs in extra hands.good luck
     
  6. Venice Motor Bikes

    Venice Motor Bikes Custom Builder / Dealer/Los Angeles

    Joined:
    Mar 20, 2008
    Messages:
    6,168
    Likes Received:
    16
    You don't need a ring compresser for these.
    Also, make sure the piston is facing the right way! & take heed of what Joe said above about the little pins in the ring grooves!!!!! (you WILL break the rings if you don't!)
     
  7. justthisguy1292

    justthisguy1292 New Member

    Joined:
    Jan 16, 2009
    Messages:
    39
    Likes Received:
    0
    I have the rings on the new piston. I took out what i think is a retaining pin or clip of some kind from the old piston but the rod inside won't come out. it slides around but does not completely come out. should i force it?
     

Share This Page