what spark will do

Discussion in 'Electrical' started by wan37, Jan 28, 2012.

  1. wan37

    wan37 Member

    I'm trying to adjust cns carb and I put a new plug in and it is hitting the piston,real weird same plug number b6hs ngk I have been running since last may why hitting now.I'm asking which other plugs will work and not hit?
     

  2. motorpsycho

    motorpsycho Active Member

    does the plug have a new sealing washer on the threads?
    did you compair the thread reach (or length) on the new plug with the old plug?
    Sometimes, things get labeled wrong or put into the wrong box. Maybe you got a longer plug that was supposed to be a b6hs?
     
  3. wan37

    wan37 Member

    I bought three of them out of the same eight pak.As of right now I added washer from the old plug to the other new plug I don't know if thats okay it seems to be?
     
  4. motorpsycho

    motorpsycho Active Member

    so you have 2 washers on it? It will be ok.
    but that's weird because if you had a b6hs in it, and you replaced it with a b6hs, the new one shouldn't hit the piston.
    Unless you have a bunch of carbon built up on top of the piston and the old plug's tang was burned enough to clear it.
     
  5. wan37

    wan37 Member

    I don't know if the new one would hit it I just didn't want to chance it so I added the washer for safety,I feel better now after you say 2 washer were ok .Thanks motor
     
    Last edited: Jan 28, 2012
  6. dennis

    dennis New Member

    if you are loking for hoter plug keep what you have just put gap at 20 thnth/ie/.20 on normal spark gap give good hot spark I am a newbie but have benn running theses things for three years nowbuilt mine from scratch dont EVER get a bike built foer you buil;d one from scracth will help you in long run on keeping it running. your first isnt going to be PRETTY. like having your first car. its a learning process.
    :idea:
     
  7. dennis

    dennis New Member

    you bought a set of plugs for a 8 cly motor you have a 2 stroke no wounder.
    :whistling:
     
  8. dennis

    dennis New Member

    for a single cyl motor you need a plug that is desinged for it.
     
  9. motorpsycho

    motorpsycho Active Member

    let me just say that you are 100% incorrect on that.
    there is no such thing as a 2 stroke spark plug and a 4 stroke spark plug.
    NGK plugs are used in everything from lawn mowers, to cars, to dirt bikes, to boats, to motorized bike engines...all of which either have 2 stroke or 4 stroke engines.
    what makes you think that there are spark plugs designed for a single cylinder 2 stroke engine?
    the spark plug doesn't know what engine it's in, or how many cylinders the engine has.
    :dunce:
     
  10. motorpsycho

    motorpsycho Active Member

    wait what?
    what does an 8 cylinder engine have to do with anything here?
    a spark plug is a spark plug, doesn't matter that they came in a pack of 8.
    you know, spark plugs are a single peice, not 8 together as one.
    :dunce:
     
  11. motorpsycho

    motorpsycho Active Member

    how do you know that someones first build isn't going to be pretty?
    My first build sure is if i say so my self! I have seen a ton of others first builds that are pretty as well.
    The first build may be ugly for someone who is not mechanically inclined, has no idea how an engine works, or has no eye for detail...But, not all first builds are ugly.

    Oh he isn't looking for a hotter plug, he was just replacing the existing plug with a new one.
    besides that, a hotter plug doesn't mean that it will create a hotter spark, to make the engine run better.
    The difference between a hot plug and a cold plug is the heat range in which the plug will operate.
     
  12. wan37

    wan37 Member

    Thanks motor for clearing things up here! I just wanted to know a different plug to use or if I added a washer would be OK were in wouldn't harm engine.
     
    Last edited: Jan 29, 2012
  13. Al.Fisherman

    Al.Fisherman Active Member

    Last edited: Jan 29, 2012
  14. dennis

    dennis New Member

    you got wrong Idea or I did

    what I was tring to say or thought I was trying to say is that you cant use a spark plug desinged for 455 olds v-8 and turn around and put it into his bike what got me was the# 8 thought wrongly that he bought a set of plugs for a car and the fact that the piston was hitting it says it wasnt the right plug for the application. ive never had that problem so thought he had gotten the wrong plugs as I havent seen a set of 8 for our little motors atleast here in montana we buy them as a single plug since you can use only one at a time.:poop:
     
  15. motorpsycho

    motorpsycho Active Member

    well, to be honest it doesn't matter if the spark plug is for a 455 olds, a lawnmower or a small block chevy.
    as long as the plugs reach is the same as what fits in the bike engine, it'll work.
    see, he had an ngk b6hs plug in the bike engine, and that's the most reccomended plug for these things.
    He bought some new ngk b6hs plugs that came in an 8 pack (they are packaged individually but in a box of 8).
    so wheather he bought 3 plugs out of a package of 8 or if he bought all 8 of those plugs...they are all the same.
    the fact that the plugs are in an 8 pack doesn't matter.
    Just like you can go and buy a set of spark plug wires for a 350 chevy, and put them on a 350 pontiac....it doesn't matter because they are the same.
     
    Last edited: Jan 31, 2012
  16. wan37

    wan37 Member

    Thanks again motor....cleaning things up! Well I think it ran good yesterday we had a nice day in the mid 50 and today more riding time it's going to be in mid 60.I think maybe when I put the rope in the spark plug to tighten the cen clutch.I might cleared some carbon thats why it hit.Motor you need to try a cen clutch there awesome.Motorpsycho have you had a cns carb?I think I read a older post that you were going to get one.Well If you haven't don't,but mines just ok I really think I'm going back to a nt....
     
    Last edited: Jan 31, 2012
  17. motorpsycho

    motorpsycho Active Member

    yes i did have a cns at one time.
    I put it on, it worked great for about 20 minutes, and then fell off the intake tube.
    It would not stay clamped tight to the intake tube and it kept working it;s way off.
    so, I made a new plastic collar to go inside the carb to make it clamp tighter around the intake tube.
    again, it ran good but it seemed to run better with my old nt. so i put the nt back on and sold the cns for the same amount that I paid for it.
     
  18. HeadSmess

    HeadSmess Well-Known Member

    im agreeing with the dislodgment of carbon from the piston...


    i run bp6hs, which is at least 5mm longer than the b6hs. (or did until the boot started arcing out on the frame requiring a major change to a champion :eek: cj6, being a short and stumpy kind of plug that was handy)

    it "hit the piston" once... just enough to make it die halfway to work :rolleyes7:

    if a b6hs is hitting and closing the gap...pull ya head off and scrape something! washers are...dodgy and amateur :snobby:
     
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