How far can I tip a 79cc predator past 90 degrees before it becomes an issue?

Discussion in '4 Stroke Bicycle Engines & Kits' started by RocketJ, Dec 3, 2019.

  1. RocketJ

    RocketJ Member

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    I know you can make a predator engine sit upright if you add a bit more oil, but how far can I move it past that upright position before there's a performance or oiling problem?
     
  2. MotoMagz

    MotoMagz Well-Known Member

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    Check out this comparison. My buddy Racie35 turned a 212cc till the mounting plate was at about 105 degrees. I run mine cylinder straight up and down.
     

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  3. RocketJ

    RocketJ Member

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    Hey moto,thanks for the comparison. The set up I'm thinking about would require the engine to be at around 110-115 degrees. Do you think that would be dangerous or would that end up returning the oiling to a proper level at that point?
     
  4. Tony01

    Tony01 Well-Known Member

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    It runs fine. I put about 20000 miles on 212s this way.
     

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    #4 Tony01, Dec 3, 2019
    Last edited: Dec 3, 2019
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  5. MotoMagz

    MotoMagz Well-Known Member

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    As long as the dipper is in oil and slinging oil..you should be fine. I would get motor were it needs to be with side cover off and see what’s going on.
     
  6. RocketJ

    RocketJ Member

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    sounds good. I'll see what I can do.
     
  7. RocketJ

    RocketJ Member

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    Hey moto, what are the dimensions of your engine stripped down? I forgot to ask earlier.
     
  8. MotoMagz

    MotoMagz Well-Known Member

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    Mine is a 212 is that ok? Also I shaved tank mounts time Tony01 did but I also shaved head and a lot of the casting around flywheel area. It’s cold!!!! I will get you dimensions later today.
     
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  9. MotoMagz

    MotoMagz Well-Known Member

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    Pm’ed you
     
  10. waynesdata

    waynesdata Active Member

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    What kind of frame is that? Very nice fork.
     
  11. Tony01

    Tony01 Well-Known Member

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    It started life as a ‘69 Yamaha ct1. Fork is stock ct1; I shortened the legs by 3”. Made my own dropouts for 10mm axle and disc mounts as well, to slim it down for 100mm OLD from the 12x125mm stock spacing. I had a thread “212 build heavy duty” but had to delete the content. I’ll be bringing it back soon.
     

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