Gas/Oil Mix Ratio for 70cc 2-Stroke?

Discussion in '2-Stroke Engines' started by HeavyMetal84, Jul 13, 2008.

  1. HeavyMetal84

    HeavyMetal84 New Member

    I ordered a 70cc motor kit from Ebay seller boygofast. The user manual only gives the gas/oil mix ratio for his 48cc and 80cc motors, I had to email him to get the 70cc gas/oil mix ratio. I know it's his motor and all and I probably shouldn't be questioning his directions but the ratio doesn't sound right to me. In his user manual it says to use 25:1 for the break-in period and 30-35:1 after the break-in period for the 48cc motor, and 20:1 for the break-in period and 30-35:1 after the break in period for the 80cc motor, but for the 70cc he says to use 16:1 for the break-in period and 20-25:1 after the break-in period. Does this sound right to you guys? It seems odd to me that it's 25:1 for 48cc, 16:1 for 70cc, and 20:1 for 80cc, why's the 70cc gas/oil mix ratio lower than the 48cc AND 80cc? I don't know much about this kinda stuff and I just want to make sure I put the right mix in my bike so I don't screw it up.

    Last edited by a moderator: Jul 15, 2008

  2. Skyliner70cc

    Skyliner70cc Active Member

    go with 32:1 for any ball bearing 2 stroke and you'll have plenty of reserve oil not to worry about engine life.

    I personally run 40:1 but I'm using magic oil that comes from a special bean that cannot be imported legally into the USA because the bean contains a deadly poison that can be used as a weapon of mass destruction.
    lucianomi likes this.
  3. BSA

    BSA Guest

    He means castor oil.

  4. Skyliner70cc

    Skyliner70cc Active Member

    Darnit BSA, you stole my thunder!
  5. iron_monkey

    iron_monkey Guest

    Can we use castor oil from a supermarket and pharmacy? Or is special purpose engine castor oil needed?
  6. Skyliner70cc

    Skyliner70cc Active Member

    NO NO NO. You need AA first press degummed castor. Castor from a pharmacy or supermarket often has sugar in it, isn't degummed, isn't first press from the castor bean, and doesn't have additives needed to stabilize it and prevent oxidation.

    Castor Sources:
    Motorbike shops often carry maxima 927 or Klotz supertechniplate

  7. Fabian

    Fabian Well-Known Member


    Skyliner70cc has WMD's in his fuel tank.
    No wonder everone is terrified to pass him on the road.
    The government is probably working on an export strategy to send Skyliner70cc and his WMD's back to their place or origin.

  8. hellbilly

    hellbilly Guest

    WMD's from a bean? What are you guy's smokin?
  9. Skyliner70cc

    Skyliner70cc Active Member

    an amount equivalent to a half a grain of sand (500 micrograms) of ricin is a lethal dose in humans if exposure is from injection or inhalation