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Thread: Mix ratio for YZ80

  1. 08-04-2003, 10:08 AM #1
    kpeterson
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    Mix ratio for YZ80

    I just got my hands on an old Yamaha YZ80. Not sure about the year, but its either an '81, '82, or '83. One thing I have no clue about is the mix ratio for the fuel. The manual is long gone. Anyone know?
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  2. 08-04-2003, 10:48 AM #2
    J.D.
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    Buy a good quality oil, IE: YamaLube, and mix it at 32:1. Also, buy a ratiorite cup so it's easy to mix with.
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    1973 Honda ATC70-orange!
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  3. 08-04-2003, 08:05 PM #3
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    NOS_350X
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    yamalube leaves a bunch of carbon build-up on your piston (dont use it)
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  4. 12-07-2003, 06:16 PM #4
    '86X
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    YZ 80 mix ratio

    Amsoil 100:1 and don't worry about it!!!!!!!!
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  5. 12-07-2003, 07:21 PM #5
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    twgranger
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    Re: YZ 80 mix ratio

    Quote Originally Posted by '86X
    Amsoil 100:1 and don't worry about it!!!!!!!!
    100:1 :shock: Thats cutting it a little close isn't it. :?
    1985 YAMAHA TRI-Z 250 sold

    2006 YFZ 450
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  6. 12-08-2003, 10:36 PM #6
    '86X
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    Re: YZ 80 mix ratio

    Quote Originally Posted by twgranger
    Quote Originally Posted by '86X
    Amsoil 100:1 and don't worry about it!!!!!!!!
    100:1 :shock: Thats cutting it a little close isn't it. :?
    I'd say no since it is intended to be mixed at 100:1!! It does say that "severe service" or racing it should be mixed at a ratio as rich as 50:1. I mix it at 85:1 for my Banshee and know of other people that do the same.
    '86 ATC 350 X FOR SALE-- GONE!
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    '95 Banshee--The most feared ATV ever built
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  7. 12-14-2003, 10:30 PM #7
    SoCalDesertRider
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    In my 87 YZ80, as well as my 85 250R, I use Honda HP synthetic oil mixed 32:1 with 110 octane race gas, used to use VP110, now Im using Sunoco108. So far that combination has worked well in both bikes.
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  8. 12-18-2003, 12:27 AM #8
    yamahablaster
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    32:1
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  9. 02-06-2004, 11:54 PM #9
    compaqkoci
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    lol just remember you can always add some more gas if its too rich
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  10. 02-07-2004, 08:24 PM #10
    dz
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    I had an 86-87 yz80 I did my oil mix at 20:1, it worked.
    If it aint old I dont want it!

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  11. 02-14-2004, 01:51 PM #11
    SychoCR
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    im almost done restoring a '78 YZ80, what mix should i use in it?
    JUST DUNE IT !!!!
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