New guy here wanted to introduce myself / Taco minibike project
Hello. Nice to meet you all. I look forward to picking up what I can here and hope to be able to add to the forum when I can. My first EV build is a Taco minibike that currently sports a five horse briggs. I picked up a 1204 curtis controller, a magura twist throttle, three 12 volt 20 amp hour batteries, and a used WW2 era 24 volt ball bearing aircraft starter. The fabrication and machine work will come easy it's the wiring I am confused about. I am new to the game and have little experience and no local EV pals yet. Here's a first pic for fun, I hope I have the size right. I live in SoCal.
The Curtis controller takes a 0-5k ohm input across its throttle inputs. You should get a multimeter and use the ohm setting to figure out which pair of the wires are 0-5k ohm. One pair of wires will read 5k ohms regardless of how you twist the throttle. The other two pairs of wires will read 0-5k and 5-0k ohms.
The green wire is correct but it's good form to put a switch in the middle of it. However with the low key esthetics of that bike ;-) you could just have a wire with a blade connector on the end and disconnect it each time.
As for the battery pack you've got it pretty much wrong. The way to do it is
===== +BBB- +BBB- +BBB- =====
That is ... take that blue wire going to the + of one battery, this is the positive-most connection in the pack ... the - of that battery is then wired to the + of the next battery ... the - of that battery is wired to the + of the next battery ... and the - of that battery is the negative-most connection in the pack.
The positive-most of the pack is wired through a fuse to the + of the controller.
The negative-most of the pack is wired to the - of the controller.
Something which will help is to read the install manuals for the Alltrax controllers... http://www.alltraxinc.com/Doc_Depot.html ... Yes, you have a Curtis controller, but the Alltrax controller documentation is readily available and has roughly the same connectors.
Ah.. uh.. Curtis Instruments Series Motors... whaddaya know...
Get a 700-800 watt 36v scooter motor on ebay. I've seen them for 60-80 $$
That should be perfect.
Wow, very very cool sandcasting using styrofoam. Where do you buy the materials for doing something like that? It looks like a great alternative to milling.
I love your little tacobike, by the way. Check out my own blog where I converted a moped to electric using an RC helicopter motor and parts.