Engine Smoke

Discussion in '2-Stroke Engines' started by StoreKeeper, Aug 20, 2010.

  1. StoreKeeper

    StoreKeeper Member

    I bought a bike with the 66c engine ( new) and used 4 OZ per 1/2 gal for 2 tanks and then went to 3 OZ after that.

    I have about 5-7 hours.

    It seems to still smoke alot

    The spark plug is a Great Master 4118c .

    What would you recommend

    New plug? (Which one/Where to get it/ Gap.

    Carb adjustment/

    Less oil in fuel mix?

    Tanks in advance

    Last edited: Aug 20, 2010

  2. GearNut

    GearNut Active Member

    go to 4oz per 1 gallon. 32:1 ratio.
    Spark plug NGK B6HS or BP6HS.
    The "P" one has projected electrodes that will stick further into the combustion chamber. It will not fit on some engines. It does fit mine though.
    Also, I run Maxima Super M, a "smokeless" oil.

    I highly recommend using a quality pre-mix oil made for motorcycles, regardless of manufacturer. Do not use weedwacker oil. Your MB engine has a tougher life than a weedwacker.
  3. StoreKeeper

    StoreKeeper Member

    Thanks for the update!

    Any place in San Diego,Ca where i can get these things?

    Rx Bruce
  4. GearNut

    GearNut Active Member

    Any good motorcycle store, other than a Harley dealership.
    Try to support the small shops if you can.
    I got mine at Full Throttle Powersports in Santee.
  5. StoreKeeper

    StoreKeeper Member

    What can I ge there?

    I will go there

    Rx Bruce
  6. GearNut

    GearNut Active Member

    He sells Maxima oils, NGK spark plugs, fuel filters, and every kind of motorcycle accessory you would typically find at a shop. He does not stock a ton of parts, but can order them and have them in a couple of days.
  7. RdKryton

    RdKryton Active Member

    GearNut is correct.
    I just double checked the math and 4oz per half gallon is 16 to 1. That is why you still have smoke. It's way too rich with oil. 3oz to a half gallon is still only 21 to 1.

    Last edited: Aug 24, 2010
  8. StoreKeeper

    StoreKeeper Member

    Well currently what in the tank that smokes alot is 6 OZ per gallon.

    Gallion is 128 OZ divided by 6 =21.33 to 1 ratio.

    5 OZ to a gallion is 25.60 to 1

    4 OZ to a gallion is 32 to 1

    Is my math right?

    What should I go with?

    Thanks in advance

    Rx Bruce
    Last edited: Aug 24, 2010
  9. GearNut

    GearNut Active Member

    4oz per gallon, 32:1 ratio is what I run, has never failed me, and is what I recommend for high quality motorcycle pre-mix.
  10. StoreKeeper

    StoreKeeper Member

    I'm going to the shop tomorow morning in Santee and get the oil and spark plug NGK B6HS. that you recommended

    What gap on the new spark plug?

    Rx Bruce
  11. GearNut

    GearNut Active Member

    .025 to .030" works well for me.
  12. tacoshell4

    tacoshell4 Member

    gearnut, glad to see another super m user!!!!
  13. StoreKeeper

    StoreKeeper Member

    Went to Full Throttle Powersport in Santee and got the Oil and ordered the NGK B6HS.

    I'm going to go with .027 gap for the plug?

    They will have it there by Friday.

    Great shop thanks for the recommendation.

    Rx Bruce
  14. GearNut

    GearNut Active Member

    You are welcome! A .027" gap will work fine.
  15. GearNut

    GearNut Active Member

    It is good stuff! I still have a little of the castor fortified blend left that I am burning right now. One of the benefits of cleaning out a corner of the garage!
    I love the smell of castor. I wonder why Maxima discontinued it.
    Oh well, maby I'll add a little 927 to the next bottle?
  16. tacoshell4

    tacoshell4 Member

    dude so funny i just scored a half gal from like the 90's lol castor fortified listen you can buy the injector oil castor fortified and mix it 50 50 with the new super m the injector oil is the same as the original blend but they use a thiner base oil thats it! you dont even have to mix the 2 you can premix it too
    Last edited: Aug 25, 2010
  17. Uncle mike

    Uncle mike New Member

    New here

    Hi ppl, I recently acquired a 66 cc motorized bike and I love it. but it seems a bit sluggish at top end. I run premium fuel 90 octane or better with a good premix oil and I am wondering what I'm doing wrong. It has original plug in it and I'm just trying to figure it out. Any help at all would be super beneficial. thanks in advance
  18. Uncle mike

    Uncle mike New Member

    One more thing

    I am also mixing 50:1 as it says on the decal on the motor
  19. butre

    butre Well-Known Member

    Any stock 66cc will stop accelerating at around 30 mph. The only way to go faster is to spend money.

    I can easily hit 40 MPH on flat ground with my mods, but I spent a lot more time and money on my bike than anyone using a stock engine. The cheapest way to go very fast is a shift kit, there are people who have spent less than me on their bikes and go faster because they went with a shift kit instead of going single speed like I did Keep in mind those extra bearings and chains will suck horsepower, the gain is thanks to you being able to keep it in the rev range.

    I've found that tucking in tight and wearing more form-fitting clothes helps the aerodynamics situation enough to gain some extra speed as well.
    Last edited: Apr 26, 2014
  20. Uncle mike

    Uncle mike New Member

    Thanks a lot. Butre