1 million plus views, for a video, where the engine didn't start, and, no Weed Wacker demonstration. Well done.

i was just going to tell you i truly thank you that is the best video i have seen u really explain stuff and i should know i have been looking on the internet for like 5 days now so thank you

thanks im workin on a weedeater bike with a craftsman engine this is a great idea great help

Thanks. Interesting. Honest and very clever.

Mate. thats a seriously great project! the best way ive seen put together. I was kinda planning on building mine too and i wanted a 6/7 speed gear changer on it if they all fit. that vodeo is 10/10 nicely done.:)

Good information about weed wacker. Motors for bikes

this is the simplist most genuis thing i would have never thought of

An easy way to find ratio is to put the valve stem at the top and mark the clotch drum with tape.Then turn drum and count how many turns it takes to bring the valve stem back to the top. THIS IS A REAL-WORLD WAY TO CORRECT FOR THE FACT THAT THE TIRE HAS A MUCH 'LENGTHIER'CIRCUMFRENCE THAN THE CIRC.OF THEREAR SPROCKET. 10 to 1 is Ideal.

thanks youve given me ideas for the one that i'm building

wow mate well done your inginuity is amazing...

Damn good thinking guy.

Nice build...higher primary ratio will get the engine into its power range sooner. you'll lose speed but more drivable...you have some good ideas. I think I'll use a few on my next build.

awesome vid im planning on making a chain bike but with a sprocket on the left side of the rim and attatch it like the happy time (rubber or something) so this video with help me out alot :D gwd luck building the chopper, look foward to seeing it.

Very well documented and the project shows ingenuity! Much better setup than the old "drive shaft rubbing on wheel" drive systems. I notice you have other bike projects you have posted as well. As a small engine fan (my self included) I thought I'd share a really good resource with you and other viewers. tncscooters is the best com site I have ever found for parts. All $ are US$. Carbs $15, manual disk brakes $7, rotors $9, etc, etc. Carbs seem to B 1st thing that goes bad on small engines!

Cool dude ; ) mine has 12' wheels 23cc stihl I removed the clutch springs onto anglegrinder gearbox =3.1/1 then 8tooth to 36 tooth sprocket bmx chain, does 46kmh running on premium+moth flakes :D

You are the best 😀😃😃😀 good luck

you could setup a multi sprocket system for shifting to get moving faster at slow speeds and shift up as you move along.

i made a 21 speed mountainbike like this,minimotor engine,2 fast to stop.nice work.

@brn2plyhcky7 thanks mate, well i have to take it to a workshop.. they dont come pre machined

well done mate can't wait to see your chopper machine i have made a mini bike with a new chinese 16 hp motor on it 5 8 0 cc it does around 50 mph plus i have another one which is a v twin vanguard briggs and stratton 6 2 7 cc 22 hp but governed not sure what speed it does yet the motors on a hinge pivot which tightens a belt and away you go its only one gear .jacksharft system as you have.

That's the point. We (I, anyway) don't do this because we have to, we do it because we want to. We like it. I'm not shooting you down on this, but I couldn't help it.

You should have used #25 chain on the First part of the jackshaft. You would have been able to put an even smaller sprocket on the motor therefore it could have revved out higher and given you more torque. I like your design though I think I might make one like this.

(11/30) x (11/72) = 17.85+ :1 If you know how tall the tire is, you can now figure out how fast you're going (in mph) for any given engine speed. So if your rear tire is, say, 3.25-16, you can calculate tire height (will need aspect ratio to do calculation, or just take a tape measure and measure it), then run the formula: engine speed (rpm) x tire height (inches) / 336 (constant) / overall gear ratio (in this case 17.85:1). The answer you get is in MPH. I ran it and just used 100% for the aspect ratio. I found at that engine speed it should be going a little over 22mph.Not bad!

Nice video. I would suggest a larger Centrifugal clutch, if it can fit between the bracketry. Too much load for that one. Nice bike and Cheers!

great idea

Hey Mate, great vid. i'm working on something like this at the moment. , quick question: can i have the gear on the engine larger than the gear on the back wheel and it work? i'm using a 50cc Steele chainsaw eingine. Tah

For the gear ratio you find out the gear ratio for each part and then ADD them together not multiply. Just thought i would clear that up. Also yes if u go to my channel and type "how to mount a sprocket" or along those lines you will find a video on how to mount one.

imma subscribe to you because you seem like your a cool dude that knows what hes doing!!!!! :)

There is a third way for the final drive, a belt drive. i did it without a clutch first with a underpowerd suffolk lawnmower engine. Later on i used the engine of my old pocketbike that one had a clutch but i still used the belt drive cause it was on There anyway so why not. Now im going back to the old way without clutch. But a belt drive is easy to take off, easy for riding without the engine or if the Police shows up :)

spanish euro mid and amarican, are the sizes. you can also get an amarican to mid conversion kit through haro and it can have 22 20 or 19mm driveshaft going through

holly sh... turn the engine on dude !

@HUNTINTHEWORLD1 i drilled the inside of the sprocket out to fit the clutch shaft

@shinyfuzzy thanks you, very correct indeed

I like it cool stuff

haha, your voice is TOTALLY changed! good looking out on that ;)

as you would say AWSOME!

nice work :)

nice bike!!

good video, good idea, would think going to so much effort an air filter on the carb wouldn't go astray

What went wrong with the bike? There's a very good video from davidsfarm with a similar setup. So with the slippy clutch isn't it better to scoot it up to 20kph with your feet if possible then use the engine?

You should have kept some kind of pedals on it. Where do you put your feet while your riding?

Please come back and make it start!

if we put one more carban fibre frame on body it wil look futuristic.

@brendonv101 no sorry your wrong you have to times them by each other. im not going to go into detail about it i will have to do that on another video. lets not get into an agument

@cjennings141 I think it would go backwards on his set up. It depends what way the engine turns.

We need to see this work.

I cant wait to see more on your motorized chopper bike iv always wanted to do that but i sadly had to sell both my schwinn chopper bikes... Im currently working a really cool motorized cruiser bicycle this will be my second motorized bike i have built. you should stop by my channel some time and check out some of my new projects

Can you just go straight from the end of the weed wacker to the back sprocket will it work without the clutch

Remove the bearing cups from the bottom bracket and you can easily put other bearings in.

Take a shot every time he says umm

DodGEEY! Lol. Hope u don't lose ya leg when the chain snaps. Lol

Bravo

cool Loctite everything.

If I use a 2 HP 4 stroke engine on a bike like this, do you think I would still need such a low gear ratio? or would you say the engine and clutch are capable of a 9 to 1 ratio? Thanks!

@Icecube5285 couldnt you technically have the engine on the otherside so there isnt a need for the secondary chain?

Cchang4us where did u get the clutch because it is very hard to find a clutch that will fit a weed wacker

You ported the heads...That's funny.

I would think a mountain bike platform would work best, that way u can use the gears

I got a good friction drive weedeater bike video if you guys are curious about an easier method

@Icecube5285 i thought all of it up, its not hard just some thinking time cheers, bliar

A little dangerous, but a good demonstration of mechanical ability. Hopefully any other projects you have done have turned out good.

@brendonv101 a 3:1 ratio to 4:1 ratio does not mean a 7:1 ratio, it means a 12:1 ratio.

I made a 29cc Friction Drive on my old BMX. It pulls me up to 40 km/h and I'm 57 kilos.

The 66cc 80 cc motor china kit is the best

did you use a grass cutter machine?

good good

i will also make the same

Bro, you sound aussie, why are you calling it a weed whacker.

Nice. I need a hobby and I figured this sort of stuff may just be me.

@angrygunsmith yeh my second,

my friend and i are working on a very similar design, what is the cost of the bearing holder and shaft?

@loweylegend once i changed the carby, it was a different linkage

Nice build but needs a bigger tank

Where did the rear sprocket come from?

@bazengao small 2 stroke engines are pretty economical

Nice vid mate ;) Your voice broke! Hahaha

if there was a bike to cut weeds from your yard or fence by just riding your bike, that would be kind of nice, except for the fact if it's on the grass, i don't like riding my bike on the grass lol

@HOWEEELONG He is from australia... + there is something called fast forward..

the bearing for that bottom bracket is called an american bottom bracket bearing. American is the size of it theres also spanish and european

Put a butterfly carburetor and huge tuned exhaust pipe and that thing will rip

Cool peace

@pgfracing about 20km

Do you need a tag to ride that on the streets?

better watch those ankles

if u still had this you could found a victa which are everywhere in australia put a new carby on it and a clutch, mount the motor with maybe those same mounts and you'll SHIT LOADS OF POWER!! mad vid anyways

How does this thing do when going up hill

Kewl...

can you make a tutorial in response to my comment Because im french .. I m not worried net ocuppe of the written translation;) you used an engine which machine? Thank you in advance :) I adore this project, c j is why I want to achieve it thanks to you.

howd u get a sprocket onto the clutch

can u do a cold start on it?

how far could you go on a tank of gas?

nicr

@ArrowOfFortune yes, that's a bit too much for a bike

@TheKeithProject nope

how fast does it go

i think he uses the foot pegs on the back tire

oh look youtube! this video is featured so lets put an ad on it!. then when its not lets just take it off

I will take it

4 ppl wanted to hear what it sounded like

now i know how to spell umm hahaha