Recent content by maurtis

I run 24s on my 1000W GM901 motor (same as the Yescom motor) with the Lyen 12fet 4110 controller programmed to 45 battery amps and 100 phase amps. I am thinking about lowering the phase amps a bit, though, since the throttle is twitchier than I would like when cruising in the mid-upper 30s...

I have the Golden Motor GM901, which should be identical to the Yescom motor, and it has very little drag. I heard people talking about cogging and resistance with DD motors, but I notice very little with my motor. I installed a 9C 2807 on my wife's bike and I find there is a bit more...

The amp rating on the controller comes into play when under load, like accelerating at low speed, on inclines, etc. So when taking off from a stop or accelerating hard, you will hit that easily, completely independent of what battery pack you are running. So unless you pedal a lot from stops...

If you are at all leery about batteries, I would stay away from RC lipo packs until you have done a LOT of research and soul searching. I went from SLA to lipo and glad that I did, but these little bricks can be very touchy. They are not at all plug and play, set it and forget it. You do...

BTW, that "old bike" with the China Girl is a Walmart 32" Genesis Super Cruiser with the top bar welded on for the gas tank support. I cannot believe he was actually able to stuff a China Girl in that small opening. While I think the style is terrible, kudos to the builder for making it...

Out of those two, I would go with the em3ev pack since it supports a 3C discharge rate, so over 48A. Whereas the ping pack peaks at 30A. But in order to get 30 miles out of a 15 - 16AH pack you are likely going to have to cruise closer to 20 MPH, or have tall gears and be able to pedal to...

Good luck! I am usually leery of aluminum frames for motorized bikes, but I know people use them successfully for electrics so you will likely be fine. We experience a lot less vibration than gas bikes do. That is a great looking bike, btw! One thing you are going to want to take a hard look...

Thanks! The front cantilevers and rear regen stop the bike ok, but you really have to want to stop. Rear calipers will definitely help. I ordered a set of Tektro C326 side pulls, but the reach was a little too short. So I have a set of the longer reach C324 calipers coming in. The torque...

Wow, you guys do some really good work! When tasked with making a clean setup for my wife's bike, I went with leather panniers with wood sides. The wood sides allowed me to build a rigid frame with the batteries mounted to a shelf that can slide out for charging, and also was easy to make with...

How well will a fast wind motor in a 26" wheel hold up on dirt trails? Is the terrain you are looking at flat-ish hike-and-bike trails, or hilly stuff? I have that motor running 24s (and love it), but only run on the street and it is pretty flat around here.

I finished my wife's cruiser a little bit ago. She insisted that I use her Huffy Panama Jack and that I keep it clean, so I built panniers out of cedar and leather to house the batteries and controller, with 4 "silent" CPU fans in the controller bag for airflow. I used some cantilever brake...

Thanks Paul! BTW, here is a picture of the batteries snug inside the bag, before making the serial and parallel harnesses:

The bulk of the build time was spent on making the saddlebags. While an easy, straightforward procedure, my lack of tools and wanting to get them right for my wife made me take extra time and care. I started with an 8 foot cedar plank ($5 from Home Depot), rough cut into 4" x 12" sections. I...

The bike rides like a dream and pulls nicely. My wife is at a doctor's appointment this morning, so looking forward to us riding together over lunch! The neighborhood speed limit is 25 MPH, so my goal was a 30 MPH eBike that did not require pedaling and something in the 14s - 15s range (lipo...

After sampling the sheer joy of my 24s GM 901 hub motor build, my wife decided she needed one. Okay, I actually decided she needed one. Due to medical concerns, it is a chore for her to pedal so her bike was sitting unused in the garage. I really wanted to use a better quality frame, but she...