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Thread: 49cc air cooled mods

  1. #1
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    3rd June 2008 - 11:58
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    49cc air cooled mods

    hey i just installed these mods on my aircooled mini moto

    high compression big bore kit
    -bored barrel
    -alloy head and studs
    -piston
    -conn rods
    -crank
    performance plug
    19mm carb upgrade and pod filter
    racing exhuast
    racing clutch
    running 106 leaded racegas 1 to 55 on castroll tts

    goes good....

    just wondering can this still suit any race class?

    thanks


  2. #2
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    15th June 2008 - 18:13
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    shite isn't that a bit lean? I used to run my modded b1 rep at 25:1.. saved having blown top ends...

  3. #3
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    11th July 2008 - 21:37
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    Quote Originally Posted by Rodney007 View Post
    hey i just installed these mods on my aircooled mini moto

    high compression big bore kit
    -bored barrel
    -alloy head and studs
    -piston
    -conn rods
    -crank
    performance plug
    19mm carb upgrade and pod filter
    racing exhuast
    racing clutch
    running 106 leaded racegas 1 to 55 on castroll tts

    goes good....

    just wondering can this still suit any race class?

    thanks

    the nationals club you'd be in proody mod.....
    chuck norris's calender goes from march 31st to april 2nd

    No one fools chuck norris.......

  4. #4
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    5th February 2008 - 13:07
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    Quote Originally Posted by trademe900 View Post
    shite isn't that a bit lean? I used to run my modded b1 rep at 25:1.. saved having blown top ends...
    naw we're running our b1's at 100:1

    Thats Amsoil 100:1 premix oil though - the top of the market. We'll let KB know when we blow our first engine, but I doubt we will.

    Steve
    "I am a licenced motorcycle instructor, I agree with dangerousbastard, no point in repeating what he said."
    "read what Steve says. He's right."
    "What Steve said pretty much summed it up."
    "I did axactly as you said and it worked...!!"
    "Wow, Great advise there DB."
    WTB: Hyosung bikes or going or not.

  5. #5
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    Quote Originally Posted by DangerousBastard View Post
    naw we're running our b1's at 100:1

    Thats Amsoil 100:1 premix oil though - the top of the market. We'll let KB know when we blow our first engine, but I doubt we will.

    Steve
    I don't understand why some folk do this. I mean sure it's amsoil... but 100 to 1 is rediculous for these tiny motors... You will not gain power from running it at that mixture... I'm just curious... why the hell not run at least 50:1 mixture? It's not going to do ANY harm!

  6. #6
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    Quote Originally Posted by trademe900 View Post
    I don't understand why some folk do this. I mean sure it's amsoil... but 100 to 1 is rediculous for these tiny motors... You will not gain power from running it at that mixture... I'm just curious... why the hell not run at least 50:1 mixture? It's not going to do ANY harm!
    Mostly we do it to alarm hell outa everyone - always a horrified look!

    Seriously though, the main reason is they start real real easy. First pull prime, second pull start, perfect idle every time, no stalling. We see people pulling the bloody starter cords off their bikes in frustration trying to start the bitch, while we sit there idling waiting for them. It just makes my life easy, and anything that does that gets to stay.

    Anyways, one drip of oil more or less, and we have 50:1 anyways, and we make sure we don't over-ratio, so its more likely to be in the 60-80:1 ratio.

    Steve
    "I am a licenced motorcycle instructor, I agree with dangerousbastard, no point in repeating what he said."
    "read what Steve says. He's right."
    "What Steve said pretty much summed it up."
    "I did axactly as you said and it worked...!!"
    "Wow, Great advise there DB."
    WTB: Hyosung bikes or going or not.

  7. #7
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    15th June 2008 - 18:13
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    Ah ok I see.

  8. #8
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    3rd June 2008 - 11:58
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    55:1 mix i get startup after first prime with a light spray of engine start


    also race gas has lead.... lead is a form of lubrication ,, hence running it leaner than normal

    100:1 is crazy

    fixed idle problems by putting spacer on idle screw to preload the spring more and hold it in place rather than vibrate loose

    and if it has good compression it should start fine at 25:1


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