Weed Eater Friction Drive Bicycle

[rawly old]

There a number of bike pegs 7/8" o.d. the will thread right on to the shaft.
I think yours should be 26 thread. these pegs come 26t on one end, 24t on
the other. ...A 3/4" deep socket with a lock washer dropped in will bolt on.
You can cut gripping grooves into it with a dremel. the pegs are cheap; just
be sure to get one cut from a solid billet as some are extruded and won't
hold up.

 

[landuse]

Thanks Rawly old. I also had a look at my carb to see if I could do some adjusting, and I found that there are no high and low mixture screws on this carb, only a idle screw. I found this quite strange. I guess they preset it at the factory

 

[landuse]

I took some pics of the little carb. Maybe there is something you guys can see that I cannot.

 

[landuse]

I have been thinking of some ideas for rollers, and decided to use Deacon from the motorizedbicycle.com forums idea of a pipe and endcap.

This is what I picked up today. I got a piece of galvanised pipe with an inch outer diameter, as well as an endcap for the pipe. I had the place put some thread on the end so that I can screw the cap on.

What I am going to do is drill a hole (hopefully dead centre) in the cap, attach it to the motor shaft, and then screw the pipe on, using loctite as well. I will cut some grooves in the pipe with my angle grinder to give it some roughness for my tyre. Hopefully this will help a bit with my poor torque.

 

[landuse]

I decided to go to a machine shop, and ask them to make a roller for me. I drew up some plans that I gave to them. I asked them that I need a 110mm long piece of 1 inch diameter round bar, with a 9.5mm diameter hole, drilled 55mm into the bar. I then need a further hole of 22mm which is threaded with an 8X1 thread.

The first drawing below shows the bar that I need made, and the second drawing shows the shaft that it is going to slide over and screw onto.

It is going to cost me about $11 to get it all done.

 

[landuse]

Yesterday I got my roller that I had made at a machinist. It looks really nice. I still have to test it out, but hopefully it works a lot better than the 1.5 inch peg that I had

 

[rawly old]

that should do it as long as it's dry. With friction it's hard to make
anything work in the wet. This'un works pretty well tho.

 

[landuse]

I tried out the roller on my bike yesterday, and it works very well!! It still struggles on hills, but on flats and downhills it is fine. I just have to tension the roller a bit more, and maybe roughen it up a bit more.

I now have to manufacture a clutch for myself. I was holding off from doing that before I knew if this would work.

 

[rawly old]

I applaud yur dedication. for a clutch just make a lever that lifts it off
& clamps it down. tire pressure should be close to max & ya need a firm solid
contact. Even so it's gonna struggle with hills. It ain't a Harley v-twin;
it's a wacker. Ya still gotta pedal.

 

[landuse]

I applaud yur dedication. for a clutch just make a lever that lifts it off
& clamps it down. tire pressure should be close to max & ya need a firm solid
contact. Even so it's gonna struggle with hills. It ain't a Harley v-twin;
it's a wacker. Ya still gotta pedal.

Thanks rawly old. I will keep you all updated on the clutch build.