Plug Champion L86C???

Discussion in '2-Stroke Engines' started by raimond, Jun 2, 2010.

  1. raimond

    raimond New Member


    I have bought the plag Champion L86C (the Champion L87Y is equivalent to the NGK BP6HS).Do someone knows it?? I feel that my motorbike runs a little bit slowlier...why?

    Before I had the original Z4C. Which model of plug is equivalent to the Z4C?


  2. Al.Fisherman

    Al.Fisherman Active Member

    Last edited: Jun 2, 2010
  3. HseLoMein

    HseLoMein Member

    If im not mistaken, those are mini plugs. If they are, you are losing power because they are smaller and sit higher up in the sparkplug hole, which lowers compression.
  4. Esteban

    Esteban Active Member

    Dig hole,,,, put Champion plug in hole,,,, fill with dirt. Go get NGK,, or any other brand.
  5. raimond

    raimond New Member

    Also when I go open throttle the engine doesnt work short times stop working....why???
  6. Al.Fisherman

    Al.Fisherman Active Member

    You haven't mentioned changing the plug as of yet. If you haven't you need to start there...can't help until you change the plug and a new good wire would be good.
  7. raimond

    raimond New Member

    I mean after I changed the plug.

    Before, with the Z4C it was working very good...until the plug died.

    Now,with the Champion L86C i feel less power and doesnt work good in open throttle

    Which is the NGK most similar to the originall Z4C??

    Thanks a lot for the help!!
  8. Al.Fisherman

    Al.Fisherman Active Member
    A Z4C plug is a 11mm...7/16" plug..Where did you come up with the L86C (L87YC) for a Z4C replacement? A L86C (L87YC) BP4HS/BP5HS/BP6HS/BP7HS is a 12.7mm...1/2"
    If your engine in fact used a Z4C plug which is 11mm in length and you installed a L86C plug which is 12.7mm in length, you might of closed the gap on the plug.....ya think? 1.7mm (12.7mm-11mm)= 0.0669". If you gaped the plug at .024", it might of closed to .017"
    11mm 7/16"
    H5 H7T Z4C Z8C M5 M7

    BOSCH....WS8E WS5E

    Nippon Denso (ND)...W14L-U W16L-U W20M-U W22M-U

    Champion...H10 H8 CJ11 CJ8 CJ6 CJ4

    NGK...B4L BP6L BM6A BM7A
    Last edited: Jun 4, 2010
  9. asfazrq

    asfazrq Member

    I put an NGK iridium spark plug model #: BPR6HIX. it fit on an 80cc engine and boy the motor just runs great. no bogging, increased torque (little bit). $10 well spent