A MUST READ. Great INFO on Two STROKE OILS and PREMIXES!

Discussion in '2 Stroke Bicycle Engines & Kits' started by MotorBicycleRacing, Feb 24, 2017.

  1. MotorBicycleRacing

    MotorBicycleRacing Active Member

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    About Two Stroke Oils and Premixes:

    Read and take notes!

    http://www.klemmvintage.com/oils.htm?hc_location=ufi

    Oil Premix ratios are a subject that some folks tend to get
    emotional about . and like oil brand choice, our choices
    are about science and results.

    One of the best "general" information articles about current
    two stroke oils is at the link below.

    it is "highly recommended reading" for any vintage two-stroke
    or China girl owner.

    http://www.klemmvintage.com/oils.htm?hc_location=ufi
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  2. MotorBicycleRacing

    MotorBicycleRacing Active Member

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    Another good article on oil.

    http://ffv8.com/2-stroke-oils.html

    Break in Oils

    Some people claim that you can't break in an engine with synthetic oil,or castor oil.

    You can seat the rings on a KT100 running synthetic Amsoil Saber at 16:1 in a couple of laps.

    Run what ever oil brand & ratio you plan to use in an engine from the very first start.

    Fuel mixture is much more important. Run a little rich at first. Re-jet, use partial choke - whatever it takes to avoid running too lean on a fresh engine.

    This will reduce cylinder temperatures while helping to wash away the metal particles produced by ring seating.

    There is a popular 2 stroke import engine out there with all sorts of break in recommendations. Extra oil, etc.

    The factory oil advise about 16:1 initially is ok, as long as you add fuel too.

    That engine is a low quality, inexpensive unit.
    I have measured cylinders at .005 or more out of round.
    Piston rings that only make contact at a few spots initially. No wonder they tell you 16:1 - the extra oil helps seal the rings!

    Running this engine at WOT with enough oil & fuel is the best way to seat the rings - and it will still take awhile..
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  3. MotorBicycleRacing

    MotorBicycleRacing Active Member

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  4. Kartooo

    Kartooo Member

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    appreciate it, some eye opening info and a good read.
    film strength,radioactive to measure lube, seadoo no oil at idle, 100-1 theory.
    i was given some 100-1, i just could not bring myself to use it, i'm old school.
    brought up on 1qt of 30wt per 5 gal gas can.
    took a bit to accept it but i now use synthetic blend at 32-1...
     
  5. Tyler6357

    Tyler6357 Member

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    I'm using the OPTI2 at 100x1, I've been using it for the life of the motor and I'm kinda afraid to switch after 1600 miles
     
  6. MotorBicycleRacing

    MotorBicycleRacing Active Member

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    Do you race with that 100 to 1 mix at the Socal races?
    Baird used to but got sick of destroying motors at the track.

    100 to 1 will work just fine for putting around town.

    Also at 1600 miles have you refreshed the top end?
     
  7. Tyler6357

    Tyler6357 Member

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    I have been using the OPTI2 at the race but I mixed it a little bit richer than 100x1. Also, I put a Fred head on to help with cooling. The only thing I have changed on the top end was the head and head gasket. I was thinking of replacing the needle baring and getting new rings.
     

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