Is This Normal Looking?

Discussion in 'Motorized Bicycle General Discussion' started by MrLarkins, Jun 23, 2008.

  1. MrLarkins

    MrLarkins HS Math Teacher

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    Is This Normal Looking?
    All I did was pull it off and snap the picture. This is exactly how it was on the inside
    [​IMG]

    and this one too, is it suppose to be this oily ring around the center?
    [​IMG]
     
    #1 MrLarkins, Jun 23, 2008
    Last edited: Jun 23, 2008
  2. jasonh

    jasonh New Member

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    Looks to me like you might be running a tad rich. Then again, I know motors, but 2 strokes are like Greek to me :)
     
  3. Norman

    Norman LORD VADER Moderator
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    looks a little extra oily and has a strange looking marks on the piston the two brown spots.
    your head almost looks like its been taped by the piston (right side of the head) at the top of the stroke but hard to really tell as I don't see a corresponding marks on the piston at least I can't tell for sure looks strange on the lower right side of the piston at the 3:00 to 5:00 spot or it could be the top ring I'm seeing.
    Why do you ask?
     
  4. MrLarkins

    MrLarkins HS Math Teacher

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    could a wrong spark plug cause this? I got the NGK B7HS
     
  5. Norman

    Norman LORD VADER Moderator
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    4 strokes will go to **** as well as 2 strokes and 4 strokes have more parts to get it there. but I like both types.
     
  6. MrLarkins

    MrLarkins HS Math Teacher

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    lol i know... lots of crap
     
  7. Pablo

    Pablo Master Bike Builder & Forum Sponsor

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    Are you reusing gaskets?

    In the piston picture - which side is your intake port?

    That much crap in that short of miles - what kind of fuel and oil are you using?
     
  8. MrLarkins

    MrLarkins HS Math Teacher

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    not reusing gaskets...they are all new

    intake is left, exhaust is right, top and bottom lead to some kinda vents in cylinder

    fuel: 87 octane/1 gallon + 4 oz of Briggs 2 cycle
     
  9. Egor

    Egor New Member

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    Looks OK for the break in period, should be rich. Those spots on the piston are where the Scavenging ports are in line with, and as the blast of mixture comes out it washes the piston off. That should be a good spark plug NGK, and I like that heat range. Have fun, Dave
     
  10. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

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    Is your float too high or sticking? At 32:1 mixture you shouldn't have much carbon a low miles. Also, is this the engine that is shaking badly?

    How was the carbon removed from the top of the piston?
     
  11. MrLarkins

    MrLarkins HS Math Teacher

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    yes, this is the one and only beastly engine that shakes real bad
     
  12. Jemma Hawtrey

    Jemma Hawtrey New Member

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    Not being picky or anything, but if those two brown bits are the port locations and those are the important things that make the motor go - why are they such different sizes? or am I missing something obvious?

    It does look a little damp in there - mine when I shine a torch down it is pretty much dry as a bone inside - which is probably a little to do with the 50:1..

    Jemma xx
     
  13. Egor

    Egor New Member

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    Jemma - I am using 50 also and it is dry. I notice the engine is a little noisier also, the parts are not as covered with oil. You are correct in your noticing that the wash spots are not the same, just a Chinese engine with a little man making up the sand molds, doing the best he can. No worry these engines are so crude there is nothing that matches. Just a little note. I am a member of the Ford model T club. We had a member that discovered that the original engines had no indexing of any parts, (IE) some pistons were up higher than others and the cam, well we need not talk about that. He fixed it and do you know what he got? A model T that sounded like a modern car, that was no fun. I think it gives these things a little character, besides one of my ears is a little lower. Have fun, Dave
     
  14. MrLarkins

    MrLarkins HS Math Teacher

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    MINE TOO! and darn it is my sunglasses don't sit crooked!rotfl
     

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