motorize a bike

step by step instructions on how to motorize a regular old bike into a great awesome motorbike the bike gets 150+ miles to the gallon

Step 1 Get you hands on a bike and motor

Things you need
-Bike
-screwdriver
-zip ties 2
-66 cc motor from Grubee Inc.
-warm place to work
-gas (1 to 20) parts oil
-hammer
-gas tank
-throttle
-kill switch
-muffler
-sprocket
-318 chain
-chain breaker
-fuel line
-grease

Comments

[somebody12345]

how much does this cost?

[lemonie]

Can you show a picture with driving chain in place? (2-stroke mix is 20 gas to 1 oil) L

[shveet]

last i check it was 50ml oil to 1L gas.

[Erwin Troncoso]

50 ml oil + 1 L gas =20 parts gas + 1 part oil (20:1 ratio)

[LiquidLightning]

Lol.

[pyrotech25]

why dont you use a weed wacker engine?

they have throtel and kill switch all ready.

[Jacob Veta]

Thats only like 22cc.

[LiquidLightning]

I've seen 48cc weed whackers. And pyro, how are you going to use said throttle on a bike?

[UKtheBUNNY]

Because you can have a 66cc engine and go about 40Mph

[LiquidLightning]

30mph with the stock sprocket. 40mph with an aftermarket 36t.

[goud553]

I have just built mine not even started yet and I can't ride it as a regular bike it's really stiff and hard to move and the chain has slack please help

[LiquidLightning]

It sounds like you need to adjust your clutch. Remove the cover on the right side of the engine. Inside, there should be a large and a small gear. Inside the large gear there is a nut, and a small screw that holds it in place. Remove the screw, and loosen the nut one notch. Replace the screw and test the rolling resistance, if it is still s\difficult to move the bike, loosen it some more. Close it up and your done.

[mohnish]

im surely gonna motorize my bike,its cheaper than buying a motor cycle

[M4industries]

Electric is cleaner, but costs more than a motorcycle on craigslist for a good setup. Im going with an 80cc gas for my bike.

[Jacob Veta]

The problem is electric is slower.

[LiquidLightning]

Electric isn't slower. That is only if you compare a 300 watt motor to a 1+ kw gas motor. For the same power motors though, electric will be smaller, more efficient, and will produce far higher torque and torque from a standstill. With gearing electric can be much faster and stronger.

[Jacob Veta]

Power to weight, gas is faster hands down. And with the mileage you get, its gonna cost about the same in electricity.

[LiquidLightning]

Its still going to be cheaper per mile to use electric. gas has 36.6kwh per gallon of energy, but ice engines are very inefficient. Assuming a price of 0.12 cents US per kwh, that equals 4.3 dollars for an equvalent amount of energy as is in a gallon of gas. While a bit more pricey than gas, electric is over 4 times as efficient as the most efficient gasoline engines. Which these chinagirls are not. Therefore making electric cheaper to operate. And with electric, using lithium batteries can get you a very similar range figure, for roughly the same weight.

[the tech head]

but you have to buy all the batteries andcharge it when you run out with gas you can fill it back up and get on your way. also if you had all the batteries to keep up with a gas engine on a bike say a commom 5hp briggs and straton you would need a very large motor and some really high grade batteries that would most likley need to be lithium or li-po which are dangerous

[LiquidLightning]

"A common 5hp briggs and straton" would tear apart a bicycle frame. Doesn't really apply here.

[the tech head]

http://www.youtube.com/watch?v=dXereH8R30E

[Jacob Veta]

It would not tear it apart mine is 6.5 hp. I never have to recharge it, and the energy that it would take to make the lithium batteries would be worse thangasoline, esp. With 150 mpg fuel efficiency that I get on mine because its so light. Electric motors are expensive, fragile, not waterproof, and in this day and age just not as powerful as gasoline for the weight. I can put my engine through quite alot and I do. Believe me if I sprayed down an electric bike with a hose after a mountain ride it would not run again. It is also considerably safer because I can be heard.

[LiquidLightning]

Yes, it would. Using standard bicycle parts with a 6.5 hp engine is just a recipe for disaster. Even if it doesn't fail immediately, it will soon. And electric motors are very durable indeed. Many are waterproof. To waterproof the bike would be easy, just shrinkwrap all of the connections. Also, electric motors don't really increase in size or weight that much as you increase the power. A 7kw motor (9.3 HP), would easily fit inside of a bike without trouble, you could actually miunt it as a hub motor. They have a MUCH higher power to weight than gasoline engines. Do some research.

[bobby sissom]

this is only a store bought kit i think the author copied word for word from the instruction manual

[LiquidLightning]

You are half correct, most of the ible is copied, but not all.

[lahaina2wins]

there is no instruction manual... i built one of these as well. i wish i would have taken pictures along the way. but did not. if you can tune the carb up correctly, it will scream along at 26-30 miles an hour with the 44 tooth sprocket. faster with a smaller one, i would guess.

[LiquidLightning]

Yeahp, assuming a max RPM of 7200, these motors get just about 30mph. At a 6000 RPM cruise, you will get 26mph. with a 36t sprocket, that jumps to a high of 39 mph, and a cruise of 30.

[LiquidLightning]

http://www.biketomopedkit.com/documents/33.html

[Spud18]

Typically with a chinese 2-stroke engine, such as a pocketbike engine, it is usually recommended to be premixed at 25:1.Does the trick for me everytime, but if you use crap oil, you get what you pay for, right? I would probably personally recommend Shell 2-stroke oil or if you have brand name snowmobile oil, that works great too.

[Jacob Veta]

I have one of these, same kit and everything. You need to use 40:1 for the first gallon to properly break it in. Then after that use 16:1. Also, the oil doesn't really matter. When it comes to two strokes, all oil is basically the same, as long as it is synthetic.

[LiquidLightning]

All oil is not the same. Synthetics come with a large variety of different additives, and oil weights/densities. Oil A mixed at 20:1 could equal oil B mixed at 40:1, or vice versa. If you don't know what ratio manufacturer recommends, always go with 20:1. And BTW, don't use 16:1 in these for break in. The instructions say this due to the availability of mostly bad quality in China, here we usually, not always though, use better oils.

[2 stroke]

whatt 16 to 1 first for break in then 32 to 1. 40 to 1 is to little oil in the gas you will score your piston and cylinder walls

[Jacob Veta]

My manual says 40:1. I have that exact same engine.

[2 stroke]

really so they are not all the same ( even though they look the same ) mine is coming in the mail and their website says 16 to 1 for break in and 32 to 1 after break in

[Jacob Veta]

Ya. The manual i printed says 40, but the manual that came with it says 25. Both the same serial number. Oh nad i made a typo 16 first then 40. But now i use 32 as well.

[LiquidLightning]

Please don't plagiarise.
http://www.biketomopedkit.com/documents/33.html
If you are going to copy off of someone else's work, at least give them credit.

[pfred2]

This setup is illegal in many jurisdictions. 50cc is a common legal limit for motorized bicycle displacement in my experience. Plus the whole point of bicycling is pedaling. Also I enjoy the quiet of a good bicycle too.

[LiquidLightning]

Yes, but the 50cc and 66cc engines have the exact same dimensions. And no identifying stickers...well not on mine anymore atleast.

[Jacob Veta]

If you start it with the choke closed, and when it is started open it, it tends to run more smoothly and start faster.

[Spud18]

Also, forgot to mention, you can find these kits at http://www.zoombicycles.com/ and my neighbor has this on an old norco bicycle. he has the 80cc kit and it goes about 50km/hr. These kits ship to Canada, but unsure about U.S.