Gas Oil Ratio

Discussion in 'Motorized Bicycle General Discussion' started by Beetle Juice, Jun 12, 2009.

  1. Beetle Juice

    Beetle Juice New Member

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    Can anyone tell me a good breakin gas to oil ratio for a 66cc engine Thanks Beetle Juiceusflg
     
  2. Venice Motor Bikes

    Venice Motor Bikes Custom Builder / Dealer/Los Angeles

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    20:1... (it works for me!)
     
  3. ebmvegan

    ebmvegan New Member

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    20:1 and even as rich as 16:1 is ok. But do it for 2 gas tanks. Your bike will be a little sluggish, but it will make your engine run beter in the long run.
     
  4. Beetle Juice

    Beetle Juice New Member

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    Thanks for the quick reply
     
  5. Norco John

    Norco John New Member

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    I'm running 16:1 right now, "Universal 2-Stroke Oil" from Wally-World. I've got to dump the tank today because I mixed outboard motor oil for this can, THEN read the thread on why that was Not A Good Thing.
    Performance is not anything to cheese about, but it *IS* improving as the engine parts get to know each other. Next tank will be less oil.
     
  6. Pablo

    Pablo Master Bike Builder & Forum Sponsor

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    Depends on the oil. I sound like a broken record!!

    24:1 is plenty oil rich with some oils, WAY too much oil with Saber.
     
  7. Ulysys

    Ulysys New Member

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    I've been running 16:1 with my break in. I'm using Lucas semi-synthetic "smokeless" oil, and it ain't smokeless at 16:1 :). Smokes quite a bit actually. But I'll be through my first gallon soon, then I'll see how it does at 20:1.

    But yea, 16:1 seems like the norm for engine break in.
     
  8. city of angels

    city of angels New Member

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    alot of this shops will tell you not to run 16:1 because it will ruin the life of yur engine when you are breaking your engine your are supose go with 20:1 for the first two gallons and then go with 32:1 if you go to usabikemotors. they have a chart of how much oil to use i get my oil from the hame depot is call ryobi its really good oil well good luck raul
     
  9. Beetle Juice

    Beetle Juice New Member

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    Raul I had a friend in az his name was raul we called him puck any relations
     
  10. Junster

    Junster New Member

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    This is just what I used, it worked for me my motor runs great I have over 700 miles in 4 months. I started with regular not synthetic oil for air cooled motors. 8oz/gal (16:1) first gallon, then second gallon I went to 7oz, third 6oz. Then I switched to synthetic oil, 5oz in my 4th gallon, 4oz (32:1) ever since. I still have a little oil residue in my exhaust so I think it's lubing well. It runs strong and fast.
     
  11. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

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    I start off at 24:1 and go to 24:1 later.
     
  12. AndyT

    AndyT New Member

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    That's not much of a change, now is it? ;)
     
  13. Cabinfever1977

    Cabinfever1977 New Member

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    well i started off at 16:1 and im using 20:1 now and will use 24:1 later.
    and i never had no smoke coming out of my muffler.
    but at 16:1 i had a drop of oil drop out of muffler after turning engine off.
    at 20:1 no oil comes out of muffler after turning off,only while running - atleast it keeps my chains and under frame oiled up nicely.
     
  14. unior

    unior New Member

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    Ok something I don't understand. Why can I run a chainsaw or weedwacker all day long wide open at 50:1 yet this engine requires insane amounts of oil? Can't I mix the gas leaner and adjust the carb richer?
     
  15. Retmachinist

    Retmachinist New Member

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    I would imagine your chain saw, or for that matter almost any small 2 stroke engine was built to a little higher specs. than these Chinese Bike Motors. There is NO quality control.
    Although I am going to go to 50:1 with Amsoil Saber oil and see what happens. Worst case, buy a new disposable motor.

    John
     
  16. unior

    unior New Member

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    Well I plan to run 30:1 wal mart oil or whatever I can get my hands on. I am driving this chinese junk to work 4 miles one way every day to save loot. I think we should report back to this thread with longer term results. BTW 32:1 wal mart oil = no smoke.
     
  17. Forbisher

    Forbisher New Member

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    4 oz of oil to a gallon is what I recommend once they are broken in

    32 to 1 is just fine

    Don't pay too mucg attention to a lot of stuff you read here :D
     
  18. Pablo

    Pablo Master Bike Builder & Forum Sponsor

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    The thing to pay attention to (and most people don't) is what the oil manufacturer recommends when it comes to 2 stroke oil. In simple terms, some oils are more concentrated than others.
     
  19. misteright1_99

    misteright1_99 New Member

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    This is soooo true. My kit instructions said to run 16:1 for breakin, and talking to others and reading posts,.wee..wee. this is because the oil they use in China is 30wt motor oil which is much thicker than modern 2 stroke oils. I did my breakin at 16:1 then shortly afterwards went to 32:1 using a quality oil (AMS Saber) and have well over 1000 miles on my engine with no problems and runs VERY good...........
     
  20. xlite

    xlite New Member

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    I started with 50:1 many years ago because I had more than one engine and wanted to see. After a few thousand miles with no problem I decided to do it with all of mine. Now 6+ years later that engine has 14k on it and just starting to lose compression. Many bikes put together for myself and others since then also 50:1 and not one seized or bad bearing yet. Maybe just lucky. Or maybe that 20:1 stuff is because they use motor oil in china. And half of it drained from a car. I have watched them do it!

    One thing is for sure. Both bike and Rotax aircraft engines run hotter with more oil in the mix as measured using IR thermometer. Many do not understand that more oil makes for a leaner, not richer, gas ratio.

    I also think you can't always believe what you read on the internet (NET stands for Not Eveything's True) so everyone must decide for themselves what mix to use.
     

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