It's going to be a sweet ride!
Thanks for the pics.
Brad
Thanks for the pics.
Brad
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Project chopper
- Thread starter pegasus
- Start date
Have done a 4 to 5 mile ride, I have a bicycle track, asphalt, about a mile from where i live and it's perfect for testing new builds.
So I went there. The e-assist doesn't work as I expected. I feel a pull when I set of but after that I can't fell it give much assist and the 1-5 levels of assist doesn't seem to make any great different either.
I also found that I got more assist when i pushed with my left foot, the torque sensor is on my left side, compered to the right. My basic setup is torque sensor and controller only.
My next move is to fit a throttle and drive manual to see what assist I can expect from the motor.
The seat was also very uncomfortable and need to be changed. Because the e-assist didn't give me much help, I had to work hard with my legs, I live in a hill town, and the only way to counter the push is with your arms. I'm not used using my arms after 3 years riding on a phyton.
The chain also jumped of when i rode over a bumpy section, luckily it was near my house, and with a fixed drive you can't just lift on the chain again. Have to remember to bring a spanner, for the rear wheel, with me next time.
So I went there. The e-assist doesn't work as I expected. I feel a pull when I set of but after that I can't fell it give much assist and the 1-5 levels of assist doesn't seem to make any great different either.
I also found that I got more assist when i pushed with my left foot, the torque sensor is on my left side, compered to the right. My basic setup is torque sensor and controller only.
My next move is to fit a throttle and drive manual to see what assist I can expect from the motor.
The seat was also very uncomfortable and need to be changed. Because the e-assist didn't give me much help, I had to work hard with my legs, I live in a hill town, and the only way to counter the push is with your arms. I'm not used using my arms after 3 years riding on a phyton.
The chain also jumped of when i rode over a bumpy section, luckily it was near my house, and with a fixed drive you can't just lift on the chain again. Have to remember to bring a spanner, for the rear wheel, with me next time.
Did some digging on the net and added a thumb throttle and speed sensor, I also changed some parameters in the controller.
Now I have power, can do wheel spin with the thumb control, I also tested different control units and got it all working.
The additional speed sensor was not needed, there was one already built in to the torque controller.
But I seem to got more power with the additional speed sensor?
At first the motor disengaged with reverse pedaling, that function is now lost?
So it time to brake the bike to bits again and finish the front brake, so I can get the motor to dissengage, and a lot of other small things, like making a gear stick.
I do like the thumb control, but I don't like the chinese plastic thumb controller, what can be done?
I also have invested in a reasonable priced chinese lath, so now i have some more fabrications options open for me.
Now I have power, can do wheel spin with the thumb control, I also tested different control units and got it all working.
The additional speed sensor was not needed, there was one already built in to the torque controller.
But I seem to got more power with the additional speed sensor?
At first the motor disengaged with reverse pedaling, that function is now lost?
So it time to brake the bike to bits again and finish the front brake, so I can get the motor to dissengage, and a lot of other small things, like making a gear stick.
I do like the thumb control, but I don't like the chinese plastic thumb controller, what can be done?
I also have invested in a reasonable priced chinese lath, so now i have some more fabrications options open for me.
Next part on the list is a gear stick.
Had a piece of tube which just needed some inner and outer adjustment in the lath.
Glued on a drawing with marking for the cuts.
Cut the slots, and a tube to fit over the slots.
After some welding and grinding
Cut a piece of 10mm tube and a squashed 1/2" tube for T handle
Not to keen on the look, so back to the drawing board.
that's better, transfer to some 3mm steel.
Now I have to wait for the glue to dry before I can continue.
Had a piece of tube which just needed some inner and outer adjustment in the lath.
Glued on a drawing with marking for the cuts.
Cut the slots, and a tube to fit over the slots.
After some welding and grinding
Cut a piece of 10mm tube and a squashed 1/2" tube for T handle
Not to keen on the look, so back to the drawing board.
that's better, transfer to some 3mm steel.
Now I have to wait for the glue to dry before I can continue.
An update,
Not much have been done on the chopper since above's entry.
I lost the part I was making in the picture above, it was found, much later, in the bottom of my scrap steel bucket.
So hopefully this winter I will continue the project.
Left to do:
The fork was to bouncy, made from 25 x 1.6 mm tube, and will be remade with 25 x 2.0 mm tube, which I have in stock.
The bottom bracket is set to high, reason was the cable length from the torque sensor to the controller, I will lower it as much as I can and lengthen the cable if necessary.
Finish assembly the gear shifter.
The handle bars ends needs to be bent outward.
I also started making a back to front brake leaver, swivel at the end of the handle bar, so I could feed the brake wire through the handle bar....maybe?
The seat bracket worked but I had to tighten it as much as I could and when I toke it of, to try the same principle on my python tandem,
it broke. I have since found a different solution for the python tandem and will probably rebuild my chopper in the same way.
And of course painting, how I want it has been decided but I haven't bought any paint yet.
Not much have been done on the chopper since above's entry.
I lost the part I was making in the picture above, it was found, much later, in the bottom of my scrap steel bucket.
So hopefully this winter I will continue the project.
Left to do:
The fork was to bouncy, made from 25 x 1.6 mm tube, and will be remade with 25 x 2.0 mm tube, which I have in stock.
The bottom bracket is set to high, reason was the cable length from the torque sensor to the controller, I will lower it as much as I can and lengthen the cable if necessary.
Finish assembly the gear shifter.
The handle bars ends needs to be bent outward.
I also started making a back to front brake leaver, swivel at the end of the handle bar, so I could feed the brake wire through the handle bar....maybe?
The seat bracket worked but I had to tighten it as much as I could and when I toke it of, to try the same principle on my python tandem,
it broke. I have since found a different solution for the python tandem and will probably rebuild my chopper in the same way.
And of course painting, how I want it has been decided but I haven't bought any paint yet.
Mine was a standard fork with about 2ft inserted into the middle same 25mm x 1.6mm tube , the flex was just enough for a nice comfortable ride even using the front brake.Left to do:
The fork was to bouncy, made from 25 x 1.6 mm tube, and will be remade with 25 x 2.0 mm tube, which I have in stock.
I still have this to build a bike around :-
Or if you want sort of freak bike add another underneath and wrap the chain around both before it goes back to the rear wheel ?
I though the focus was on a camping trailer for Netherlands 2026.
I doubt DannyC or I will be going the date is to late in the year , we like to camp before the sites are full of ankle biters , and me not [ yet ] being electric assist will probably hold everyone up with my slow pace.
There are still a number of trips I have on the back burner for my Netherlands 2026 ?
Paul
It is, just thought I update you all about my unfinished projects.
