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View Full Version : I thought you guys would appreciate this DIY moped


midnightrider384
2008-11-26, 02:18
http://www.youtube.com/watch?v=FRza2xX13m4

Enjoy. I made this over the weekend.

Numberjumbo
2008-11-26, 03:08
Very nice.

I keep getting nightrider and midnightrider384 mixed up lulz.

ArgonPlasma2000
2008-11-26, 04:56
http://www.youtube.com/watch?v=FRza2xX13m4

Enjoy. I made this over the weekend.

Neat concept, and a neat way to chop off your foot. :D

I would think it would be a better idea to use a multi-speed pedal cassette and attach the chain correctly to it instead of using those ghetto ass screws. For my mountain bike, I don't even use the high speed gear and I ride it to school with traffic. (The speed limit is only 20 on campus, and I can get about 15 going up one of the gentle long slopes back to my apartment)

Besides, are those screws self-tapping drywall screws? At least get some real ones you can put some nuts on the back end. :p

Neat concept, like I said, and I especially like the part where you don't need to weld anything. What are those angle pieces you used to mount the engine to the frame?

midnightrider384
2008-11-26, 05:14
I did originally try to mount it to the third gear, but that didn't work to well. I still haven't finished screwing things in yet, I'm currently looking for another way to do it.

I have a gear cog (14 teeth I think?) that I'm trying to find a way to mount it to the side of the gears so that I don't have to screw a bunch of shit in, and it'd slip less that way. The cog came from a dirt bike gearbox, so it's about the same thickness as the clutch on the chainsaw.

As for the angle pieces, I don't know what they are called, I bought them at Lowes for my house, and I had a couple left over. They're near the lumber, and they're about 2.50 a pop, so they aren't expensive at all.

intravenous
2008-11-26, 06:23
This is needlessly dangerous man. You come off that motherfucker and you run a pretty good chance of doing some serious damage to yourself. At the very least least put a cover over the chain for fucks sake.

ArgonPlasma2000
2008-11-26, 06:29
Now that I think of it, isn't this a REALLY bad idea to get a higher speed than you can pedal since it's driving the pedals instead of the wheels?

I think I would go with attaching the chain to the drive cassette and not even use the pedals, having the engine on a rack behind the seat. That way, it's a legit "motorcycle" and you don't have to worry about driving it faster than your feet can pedal. I'd also rig up something so I could keep the gear selector working like it should.

Mantikore
2008-11-26, 14:07
wouldnt the fumes blow into your face while youre riding?

HaircutShoes
2008-11-27, 06:12
www.motoredbikes.com .. anyone looking to do this the safe way order a kit from here. They are cheap chinese motors but if you mount them correctly they work pretty well.

Running that bike with a chainsaw blade for a drive chain? This belongs in bad ideas.

jonogt
2008-11-27, 06:23
wait so do you have the actual chainsaw chain (with the teeth) going to those screws in your front gearset, or did you change it out for a bike chain? I'm assuming its still the chainsaw chain.

So, for the sake of discussion, you got the chainsaw mounted with the output drive aligned with the gears of the bike... then you stuck some SCREWS through your front gears, and looped the chain around it. Try doing just a little modification of the chainsaw by replacing the sprocket with one for a bike chain, and having it deliver power to the large front gear (like you said didn't work well... probably because bike gears don't get along well with chainsaw chain) or better yet, if it had enough power, running to the large back gear (then you could coast without a bunch of metal works clanking along creating drag).

There's ingenuity and creating something with limited availability of parts and tools, and then there's just asking for trouble. This thing is just asking for trouble. Find yourself some lower-body plate armor from the middle ages if your gonna put yourself on that thing lol.

btw, kinda makes sense why the video just talks about how he built it. He coulda spent another half hour putting in the rest of the screws and tightening up the chain (which in the video is all he said is needed for it to be ready to run) and added an action clip of riding it, but personally I'd be scared shitless to actually try that once I got on and realized the insanity of it.

bornkiller
2008-11-27, 11:56
Awesome Idea
Like where you have the motor location....:eek:
Get a shitter bike for the gearing and chain and lose the amputater chain.
Nothing worse than a one legged totsean.
(No offence to all you other one legged totseans out there):rolleyes:

Castigo781
2008-11-27, 13:04
ok this has already been said but please man please loose the saw chain replace it with a normal chain for bikes etc...it may take more time but saw chains fucking hurt please man dont wanna see this up on the darwin awards!

midnightrider384
2008-11-27, 17:30
Based on what all of you have said, I think I'm gonna go get a chain from a bike for it.

Thanks everyone. (Seriously)

13579
2008-11-28, 03:24
I've seen two DIY bikes that used a weed-eater engine when I was helping my dad where he works.

They had the engine mounted in the back, on top of the rear wheel. There was a lever to lower them, and once lowered a wooden roller attached directly to the shaft of the engine would make contact with the back wheel.

Said roller was curved inward to conform around the wheel.

I have to say, looked like a pretty good design, and if I ever made one I'd use theirs.

Food for thought.

midnightrider384
2008-11-28, 03:30
I've seen two DIY bikes that used a weed-eater engine when I was helping my dad where he works.

They had the engine mounted in the back, on top of the rear wheel. There was a lever to lower them, and once lowered a wooden roller attached directly to the shaft of the engine would make contact with the back wheel.

Said roller was curved inward to conform around the wheel.

I have to say, looked like a pretty good design, and if I ever made one I'd use theirs.

Food for thought.

That's what it's called when it's spindle driven.

The problem with this method is that it completely destroys the rear tire and if you go through a puddle it slips and you're fucked.

13579
2008-11-28, 03:32
That's what it's called when it's spindle driven.

The problem with this method is that it completely destroys the rear tire and if you go through a puddle it slips and you're fucked.

Oshit. Never mind then....

Was also just talking to my dad, and most of the ones he's seen had the spindle on the front wheel I guess.

Also, ROFL @ using the chainsaw chain.

jonogt
2008-11-28, 10:52
I've seen two DIY bikes that used a weed-eater engine when I was helping my dad where he works.

They had the engine mounted in the back, on top of the rear wheel. There was a lever to lower them, and once lowered a wooden roller attached directly to the shaft of the engine would make contact with the back wheel.

Said roller was curved inward to conform around the wheel.

I have to say, looked like a pretty good design, and if I ever made one I'd use theirs.

Food for thought.

ya that's the setup that most of Goped's models use. If you are going to be on fairly clean and dry surfaces without the need to stop and start much, they are nice because they have really good throttle-acceleration response (no centrif. clutch so no lag) and they are more efficient if you are confined to using a small engine. but ya, the tire its driving suffers, and dirty or wet conditions are a no-go.

emag
2008-11-28, 19:50
Plus much rep to you for the vid. & for drilling holes in your Trek ;)

But as others have pointed out, you have made a lot of oversights.

I was going to commend you for not being a pussy and using the chainsaw blade, but then I remembered that the chain would still be moving at the same speed and considered how comfortable I'd feel having a chainsaw running full throttle just inches from my leg. Even I, someone who often uses a chainsaw wearing soft shorts and bare feet, don't like the idea. ;)


It looks like you're going to have to attach a sprocket to the chainsaw clutch, or buy one if you can
Do you (or anyone) know if you can buy clutches that will fit chainsaws and have bike-chain sprockets?
I'd take the clutch off & disassemble it and see if it'd be possible to bolt or weld a sprocket to it. If you did modify it, you'd have to be very careful to not warp it or throw the balance off as it'd significantly reduce the life of the clutch and engine.

bornkiller
2008-11-28, 20:06
Out off curiosity dude, is that the same chain saw engine that sounded like an angry swarm of bees? yeah? :confused:
Had centrifugal clutch issue.

midnightrider384
2008-11-28, 23:54
Had centrifugal clutch issue.

Fix'd.

And to all wondering, the reason I used the chainsaw blade is because I wanted to make this completely free, I didn't want to spend a dime on this, and it succeeded. If I really wanted to seriously use this, I wouldn't be so cheap, I'd go buy a real chain and sprocket.

But seeing as I'm getting my license in a couple months, I really see no point in making this. At least not during the winter.

bornkiller
2008-11-29, 00:34
Fix'd.
At least when you say your gonna do something you deliver. :)

And to all wondering, the reason I used the chainsaw blade is because I wanted to make this completely free, I didn't want to spend a dime on this, and it succeeded. If I really wanted to seriously use this, I wouldn't be so cheap, I'd go buy a real chain and sprocket.

But seeing as I'm getting my license in a couple months, I really see no point in making this. At least not during the winter.

It can still be free and safe.
Do you have a ittle sister/brother do they have a bike? :rolleyes:

ilovechronic
2008-11-29, 07:50
http://www.youtube.com/watch?v=FRza2xX13m4

Enjoy. I made this over the weekend.

Those metal things" for mounting a roof on your house" are called hurricane tie double plate or seismic anchor. And dude seriously? you used the original chainsaw chain? you do realize that thing can fuck you up right? you can get a new chain for like 10-20$ that is meant to be chain driven, not a chain with blades.

midnightrider384
2008-11-29, 10:51
Those metal things" for mounting a roof on your house" are called hurricane tie double plate or seismic anchor. And dude seriously? you used the original chainsaw chain? you do realize that thing can fuck you up right? you can get a new chain for like 10-20$ that is meant to be chain driven, not a chain with blades.

I'm sorry, did you make a DIY moped? I didn't think so.

Also, did you read all of the posts in this thread? I don't think so, and if you did and still said what you did, then you're a fucking dumbass.

Good day, sir.

ilovechronic
2008-11-29, 21:42
I'm sorry, did you make a DIY moped? I didn't think so.

Also, did you read all of the posts in this thread? I don't think so, and if you did and still said what you did, then you're a fucking dumbass.

Good day, sir.I will lol when you fall and tear your leg up. I am not the dumb ass using a original CHAIN saw fo a drive chain right where your leg is around seriously YOU CAN GET FUCKING CHAINS FOR CHEAP. Lol and your screws into the sprocket are just fucking stpid.
The idea is great you are just making it way to unsafe. Why can't you just get a chain and connect it to the sprocket. chains are not hard to de link and re link you just need a little tool and the clip link.
.That chain will fuck your leg up bad if you fall. Or atleast file down the blades on each link with a hand file or a grinder.

midnightrider384
2008-11-29, 22:40
I will lol when you fall and tear your leg up. I am not the dumb ass using a original CHAIN saw fo a drive chain right where your leg is around seriously YOU CAN GET FUCKING CHAINS FOR CHEAP. Lol and your screws into the sprocket are just fucking stpid.
The idea is great you are just making it way to unsafe. Why can't you just get a chain and connect it to the sprocket. chains are not hard to de link and re link you just need a little tool and the clip link.
.That chain will fuck your leg up bad if you fall. Or atleast file down the blades on each link with a hand file or a grinder.

Evidently you haven't read the thread.

The reason I built this is that I wanted to make a moped out of what I had. I said in one of my replies that if I were to actually build this to use I would have changed out to a different chain.

ilovechronic
2008-11-29, 22:53
Evidently you haven't read the thread.

The reason I built this is that I wanted to make a moped out of what I had. I said in one of my replies that if I were to actually build this to use I would have changed out to a different chain. If you can use a brand new chainsaw you can get pick up a simple chain from the hardware store.I am pretty sure they have rolls of different sizes. But using screws is to attch to the sprocket just dumb..
Like I said your idea is great but you need to put a little more thought into making it safe, which all you need to do is change the chain SAW chain to a regular.
And i also did you not see i offered a substitute of FILING/GRINDING down the blades on the chain. Maybe build a housing to go over the chain drive system? Also how are you going to make the throttle setup? you may have to buy some parts for that. You have the most expensive part which is the chainsaw you just need to do a few simple things to improve the design and make it safer.Also those screws that hold the chain are a bad idea. The engine mounts are a good idea but you may want to reinforce the engine mounts with thicker steel. A drill press would come in handy for that but you could probably pull it off with a hand drill.
Lol "build a custom chain," serious it is not hard to make a chain for that and you could probably attach it to the SPROCKET. Chains are easy to come by.
Example: www.hardwareandtools.com/invt/4891909?ref=gbase What is that 10ft of 1 1/4 inch chain for 25 bucks. which you only need like 5 feet. Borrow a chain breaker from some one.

nimajneb92
2008-12-03, 03:56
Jesus Christ ilovechronic read the rest of the thread