Weed Eater Bike

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mckutzy

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How is the Peg going on the crank in the first place?
1-The whole unit threads on?
2-The peg has a nut going through the middle of the unit threading onto the crank?

If #1, my question is... are the threads in the peg the same as the crank? This off hand seems that this is your problem.They are different threads and they mashed.

To fix it, ya you can chase the threads with a die, but you need the exact size thread die to do so, and knowing what size it is, should be your first step if you need a quick fix.


(You could even borrow one, or take the motor to a metal or car shop they would have one most likely.... if you know the size.)
 
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How is the Peg going on the crank in the first place?
1-The whole unit threads on?
2-The peg has a nut going through the middle of the unit threading onto the crank?

If #1, my question is... are the threads in the peg the same as the crank? This off hand seems that this is your problem.They are different threads and they mashed.

To fix it, ya you can chase the threads with a die, but you need the exact size thread die to do so, and knowing what size it is, should be your first step if you need a quick fix.


(You could even borrow one, or take the motor to a metal or car shop they would have one most likely.... if you know the size.)

The bike peg has no threads; I'm fastening it on with a nut and washer.

My dad an I are going to buy a die (Or tap) to just re-thread it.
 

Chrispy91

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Don't have anything like that here, I'm probably just going to go Home Depot, Rona, or Canadian Tire. Most likely Home Depot since it's closer to where I live and its where the guy in the video got all his stuff.

I like the design above because I can turn it into a pedal bike at the same time (Since the peg will turn all the time when it is on). Consider this, does the engine just turn on as you pedal? Or would I need to pull start it each time?

Edit: Bad news, looks like the weed eater I wanted was already sold and the person never removed their ad :censored: But I found another one for $40 and I won't be able to get it Saturday (Hopefully). But I'm going out to get all the parts that I need for this project later today. The weed eater I'm getting is a mcculloch 31cc.

if i were you i would stay away from home depot and stuff like that, you will be paying full retail and will be a lot more expensive
 

landuse

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When I did my weedeater friction bike, I also decided to use a bike peg. I used a nut and washers as well. I just found that it didn't work out well for me at all. The peg kept on moving, cos the engine bolt was smaller than the hole in the peg.

I eventually decided to get a custom made peg. It did not cost me too much (less than the 2 bike pegs I had bought, washers etc). You can see what I did from post #23 in my build thread.

I would suggest doing something like that
 
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I'll look into it but I'm tight on cash. I'll try it with my bike peg for now (Since the hole isn't too much bigger than the bolt) and see how it goes. Thanks for the information though! If all goes wrong I'll look into it but I'm not sure if anyone in town does stuff like that.
 

landuse

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I'll look into it but I'm tight on cash. I'll try it with my bike peg for now (Since the hole isn't too much bigger than the bolt) and see how it goes. Thanks for the information though! If all goes wrong I'll look into it but I'm not sure if anyone in town does stuff like that.

I just went to the closest machine/engineering shop. They said it was the easiest job they had done in a long time. They just took a piece of 1" solid steel bar, and drilled and tapped it to the size I specified. They then knurled the outer surface to rough it up for better friction on the tyre
 

mckutzy

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Ya it should be easy for a local shop to make it, should be about $20, just make sure you give them the nut and the socket that fits the hole, or your not getting it on the motor.
Explain you situation, tell your just looking to get something simple done, bring a few drinks for the guy, sometime he'll do it for just that.
 
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I just went to the closest machine/engineering shop. They said it was the easiest job they had done in a long time. They just took a piece of 1" solid steel bar, and drilled and tapped it to the size I specified. They then knurled the outer surface to rough it up for better friction on the tyre

Thanks for that, if it all goes downhill. I'll check it out :D
 
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i would go chain driven because it would be more reliable, but im also confused about the ''friction system'', is it like a belt dive or am i wrong

Friction driven is nothing but putting a pipe-like object on the weed-eater's engine. It moves the tire by putting a downward-earth force on the pipe-like object therefore having it push onto the tire.

I wouldn't mind going chain driven myself, but I'm new to this stuff so maybe my next build will be a chain driven weed eater bike.:stir:
 

mckutzy

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Basically the crank has a drum or wheel on the end of it. That is moved into contact with the driven wheel (the rear wheel of the bicycle in this case, they also make them for motorcycles aswell) to drive it forward. Note that the motor is placed in a counter rotation to the rotation of the driven wheel, or the bike will fast in reverse....

Edit: Oh I guess xXPhasemanXx beat me to it, Im not really sure what he just said....
 

mckutzy

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For the amount of effort I reckon Id just spend the money and get a new one.
Or
Do you not have a lawnmower/power equipment repair shop in town, you are near edmonton, there is one there?
 
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