How to Make a Really Cool Gas Powered Motor Bike

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Introduction: How to Make a Really Cool Gas Powered Motor Bike

make a cool bike that make a great speed of 20 to 30 mph ( depends on CC of
engine too )

Materials:

fishing line
a box of straws
a small box
a Bike with hand brakes
a bike rack that connects to the seat   
a couple different sized chains
and a 49cc to 100cc engine

tips:
if you get a chain saw engine it will have lots more torque and power,
if the engine has a clutch it works better   

Step 1: The Engine

I mount the engine ( green ) on the rack of the bike
with the gas ( red ) tank strapped on to the box ( yellow ) strapped to the rack ( orange )

Step 2: The Throttle

The throttle on the engine should be near the carburetor and it's a little lever that I tie fishing line to

I tape straws ( blue ) on the side of the bike running fishing line through them,
the hand brake for the front tire disconnect it from the brake the tie the remaining end of fishing line to the brake handle



Step 3: The Chains

Take a couple chains until you find one that fits tightly and snugly 


In the picture it is running from the engine to the back gear 

Step 4: Starting Up

Pull the handle with the cable to start the engine then test your throttle by puling on it like a brake

then test ride

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    28 Comments

    0
    StressedC
    StressedC

    Tip 2 years ago on Step 2

    Why fishing line? just take brake cables off nother old bike..and pull it threw and then run it threw the straws.if that make's sense.. Purity cool thow

    0
    Wolf321
    Wolf321

    5 years ago

    It would be very helpful if you could add pictures or videos of your build so that we can see how yours turned out and build ours to match that.

    0
    DOMIN8ER
    DOMIN8ER

    8 years ago on Introduction

    hi i bought a 66cc engine from dragonbikes its an australian company the engine looks sweet runns ok when it starts ive replaced the plug the filters but or some odd reason i ride about 5ks then bang it bogges out n dies then wont restart (been late for work many times)i dont push it hard followed the manufactures suggestions n still wont run correctly and for long any help plzzzzzzzz thanks n my fuel mix is 40:1

    0
    Wolf321
    Wolf321

    Reply 5 years ago

    Unless you have a transmission, it sounds like you could have a bad gear ratio. I recommend trying to add a clutch and shift lever, but that might be hard...

    0
    Kcip
    Kcip

    Reply 8 years ago on Introduction

    Domin8er, you are likely pulling vac in the fuel tank. Next time it bogs on you, quickly unscrew the fuel cap and it should start running again. If this is the problem, drill a very small hole through the center of the cap to let air in while you are riding.
    Hope this helps.
    Mark

    0
    bmueller3
    bmueller3

    Reply 8 years ago on Introduction

    You may have to steep of a gear ratio or the motor is blown. Take the spark plug out and put your thumb on the hole and pull the cord a few times. If you feel no pressure then you need a new motor.

    0
    philupk
    philupk

    6 years ago on Introduction

    also, where do i get a chain sprocket that fit my chain and engine?

    0
    philupk
    philupk

    6 years ago on Introduction

    how do i attach the motor to the bike rack? i have a chainsaw powerhead.

    0
    LiquidLightning
    LiquidLightning

    9 years ago on Step 2

    I think you may be better off using actual bowden cables and connecting to an unused brake lever.

    I do believe he meant that it would be too powerful, and not a space consideration. You can mount a pretty large engine to the back of a bike, much larger than an inframe.

    0
    Koolaide58
    Koolaide58

    9 years ago on Step 4

    you will need at least 20 to 1 ratio better 27 or 28 to 1 or the clutch will burn out .
    I have buils one so it took several trys to get it right .but it will take off with my 230 lb but on it and not have to peddal at all and run 25 mph easy if you want to go that fast ?

    0
    abell18
    abell18

    Reply 9 years ago on Step 4

    what kind of ratio are you talking here?

    0
    LiquidLightning
    LiquidLightning

    Reply 9 years ago on Introduction

    Gear ratio, a 27 to 1 ratio means that to turn the wheel 1 time, the motors crank has to spin 27 times.

    1
    heathbar64
    heathbar64

    9 years ago on Introduction

    this seems a bit crude, but I like that you actually built this up yourself rather than just buy and install a bike motor kit like the other ibles.

    1
    rimar2000
    rimar2000

    10 years ago on Introduction

    Congratulations, this is a nice work! But I think a 100 cc engine would be too much for a bicycle, a little dangerous.

    0
    TSC
    TSC

    Reply 9 years ago on Introduction

    Were does it say a 100cc?

    0
    rimar2000
    rimar2000

    Reply 9 years ago on Introduction

    TSC, It say 100cc in Introduction:

    Materials:

    fishing line
    a box of straws
    a small box
    a Bike with hand brakes
    a bike rack that connects to the seat
    a couple different sized chains
    and a 49cc to 100cc engine