Search found 34014 matches

by dogman dan
Jan 15 2019 9:03am
Forum: E-Bike Technical
Topic: Crystalyte rear 408 identification and help
Replies: 5
Views: 145

Re: Crystalyte rear 408 identification and help

Thanks for the reply, I figured you took out all the screws, but others have misunderstood how the puller works.

so that comment was aimed more at others reading. It was just that rusted up.
by dogman dan
Jan 15 2019 8:59am
Forum: E-Bike Technical
Topic: Unusual Motor Behavior-Who has seem this???
Replies: 24
Views: 385

Re: Unusual Motor Behavior-Who has seem this???

If it really stutters, then the problem is a bad connection. It could be a cold solder joint inside the controller itself, on the motor or halls wires. Failing controller possible, but in my experience the symptoms are not stutter when that happens. The single most common problem though, is with the...
by dogman dan
Jan 15 2019 8:51am
Forum: E-Bike General Discussion
Topic: 40-50 mph 75 mile range
Replies: 50
Views: 1177

Re: 40-50 mph 75 mile range

FWIW, to go 80 miles range slow, on a big cargo bike meant carrying 2000 wh of battery. That battery alone would buy a small motorcycle, used Japanese, or new china type. None of which he can ride now though. So a slower, lower range e bike is his current option. Affordably, he can do a bike with 20...
by dogman dan
Jan 15 2019 8:44am
Forum: E-Bike General Discussion
Topic: Controllers, Torque and heat
Replies: 9
Views: 281

Re: Controllers, Torque and heat

Well, if a motor is rated for 5000w, it is going to be capable of serious hauling ass up hills, overloaded. I betcha though, hes running a 500w DD hubmotor, which has about a 2000w practical limit. I used to run that type motor all winter on 3000w, 72v 40 amps, and had great torque, because of both ...
by dogman dan
Jan 15 2019 8:37am
Forum: Battery Technology
Topic: Losing Lipo cells
Replies: 6
Views: 150

Re: Losing Lipo cells

Old cells is your main problem. My use of old cells gets limited to .5c, or capacity suffers real bad. Usually this is a slightly puffed cell, but not really puffed. They just lose any ability to handle 1c or more, after about 3 years, regardless if they were used much or not. Yeah, you tested them ...
by dogman dan
Jan 15 2019 8:30am
Forum: General Discussion
Topic: Help me ID this controller and what voltage I can use it with
Replies: 7
Views: 390

Re: Help me ID this controller and what voltage I can use it with

Clearly the thing does not have a 48v cutoff, which would be around 42v usually. In order to develop the full 1500w though, it would need to run on 60v. Sounds like it has no LVC to me, or at least a very low one. Most likely your cut off problem is the battery, its a 45 amps max controller, so that...
by dogman dan
Jan 14 2019 8:11am
Forum: General Discussion
Topic: Fewer Americans bike to work despite new trails, lanes and bicycle share programs
Replies: 14
Views: 304

Re: Fewer Americans bike to work despite new trails, lanes and bicycle share programs

Well, a lot of us are retiring right now. I don't commute anymore, ever. :D Same numbers might be seen in bike sales, as older bike riders simply die off, or just don't need a tenth bike at age 70. And, two buck gas does make driving appealing. Road riding is frightening. When I switched from e bike...
by dogman dan
Jan 14 2019 7:50am
Forum: E-Bike General Discussion
Topic: Controllers, Torque and heat
Replies: 9
Views: 281

Re: Controllers, Torque and heat

Let us know what your total weight is, and the grade of the hill, and its length. With that info, we can start to make practical suggestions based on our real world experience. If the speed will be limited by the power, then what you need is a mid drive you can gear down, or a very small wheel on a ...
by dogman dan
Jan 14 2019 7:33am
Forum: E-Bike General Discussion
Topic: Coaster Cycles Transit trike?
Replies: 7
Views: 188

Re: Coaster Cycles Transit trike?

FWIW, E-bikekit has a front hub kit for that type of typical delta trike. It has a powerful but low rpm direct drive motor, so its top speed matches delta trikes safe maximum. But its costly, like all the EBK kits. Don't put a 30 mph 48v 1000w kit on a delta trike. A mid drive would be a great choic...
by dogman dan
Jan 14 2019 7:26am
Forum: E-Bike General Discussion
Topic: 40-50 mph 75 mile range
Replies: 50
Views: 1177

Re: 40-50 mph 75 mile range

If you are still watching this thread EV tom, your situation is not unusual. lose the job, hard to keep up the insurance, but you gotta drive the thing till they take it away right? Now you are in a situation similar to where I was when I was 19. In high school I had time to work, buy a truck, insur...
by dogman dan
Jan 10 2019 8:54am
Forum: E-Bike Build Threads / Photos & Video
Topic: Dogmans Longtail Beach Cruiser
Replies: 47
Views: 11778

Re: Dogmans Longtail Beach Cruiser

Well, its 2019 now, so long overdue to update this thread. The bike has served very well, never having any problems with the welds. Tows a trailer like a champ. I never did tour on it, so I went ahead later the first summer, and put a much more powerful and fast motor on it. An old heavy crystalyte ...
by dogman dan
Jan 10 2019 8:18am
Forum: E-Bike General Discussion
Topic: 40-50 mph 75 mile range
Replies: 50
Views: 1177

Re: 40-50 mph 75 mile range

Well, you WILL get attention from the cops, if you build for more than 30 mph. Sounds like you lost your license, and plan to keep stacking more years of don't have one onto it to me. Something like this can carry 2000 wh of battery, 48v 40 ah, go 30 mph, and not get too much attention from cops. Fa...
by dogman dan
Jan 10 2019 8:15am
Forum: E-Bike Technical
Topic: Battery failing! Danger?
Replies: 2
Views: 328

Re: Battery failing! Danger?

Well, it would not go in my garage, brand new. Not after the garage fire I had. So that's my advice for the garage. The battery itself sounds bad. Not sure what you mean by the notoriously hot wire, but a warm wire from battery to controller is fairly normal, but it could get hot just from a really ...
by dogman dan
Jan 10 2019 8:05am
Forum: E-Bike Technical
Topic: Unusual Motor Behavior-Who has seem this???
Replies: 24
Views: 385

Re: Unusual Motor Behavior-Who has seem this???

Bad connection, and despite your inspection, I believe it is on the motor wires. Because it stutters. If it just stopped powering and started back up, then the problem could easily be on throttle, or display. Or still the motor wires. Or the battery, combined with that kit. But its stuttering, so it...
by dogman dan
Jan 10 2019 7:59am
Forum: E-Bike Technical
Topic: Crystalyte rear 408 identification and help
Replies: 5
Views: 145

Re: Crystalyte rear 408 identification and help

Was fixable, but that broken flange is not very fixable. I suppose you could weld it, but not near worth the effort even if you are an expert aluminum welder. I'm curious how the flange broke, did you have the bolts out on both sides? If not, you should have had the puller on the side of the motor t...
by dogman dan
Jan 09 2019 9:17am
Forum: E-Bike Technical
Topic: Torque arm design help
Replies: 11
Views: 271

Re: Torque arm design help

Make an L shaped torque arm, that will bolt to both those disk mount holes. then bolt up the brake with longer bolts, and if needed, washers to bring the TA and the disk mount to the same plane. The other side, looks to me like the derailleur hanger is a pretty effective TA, when used with a fabrica...
by dogman dan
Jan 09 2019 9:09am
Forum: E-Bike General Discussion
Topic: changing gear ratios
Replies: 16
Views: 286

Re: changing gear ratios

In general, a road crank will rub on an MTB frame. Because they are designed to go with a skinny frame. Really old frames might have better clearance, but the more recent stuff tends to be built to clear a 48 tooth front ring at best. If your frame is tight, you can see it now. if it looks like a bi...
by dogman dan
Jan 09 2019 8:46am
Forum: E-Bike General Discussion
Topic: Torque Arm Derailleur Mount
Replies: 13
Views: 262

Re: Torque Arm Derailleur Mount

Your frame looks ideal for drilling a hole to bolt on half of the standard front torque arm. like this. or make your own plate. one on each side. If a regular bolt can't hold it, neither can the metal of your frame. But nothing wrong with the idea of a grade 8 bolt, simply because it won't get its t...
by dogman dan
Jan 09 2019 8:41am
Forum: E-Bike General Discussion
Topic: A slow build Plan
Replies: 9
Views: 261

Re: A slow build Plan

What you will need is not on the shelf imo, but might be made from something off the shelf. Because of the wading, a motor with integrated controller down on the pedals might not be ideal. You might look into an electric version of the typical gas bike made from a scavenged motor. This goes on a bik...
by dogman dan
Jan 02 2019 8:03am
Forum: E-Bike General Discussion
Topic: Worksman utility trike build
Replies: 30
Views: 1171

Re: Worksman utility trike build

How big is this place? just tow the mower, its on wheels. You just need to add some kind of attachment point, so you can bungee the mower handle to the rear deck. The mower will tow on just two wheels that way. Bolt on a big gate handle and you have it made. My schwinns had the rear basket, and I bo...
by dogman dan
Jan 02 2019 7:49am
Forum: E-Bike General Discussion
Topic: Troubleshooting help
Replies: 9
Views: 179

Re: Troubleshooting help

99.9%, the controller blew a fet. this fet is now shorting the phase wires. Don't take the motor apart. its the controller, or a wire to it, 1000%
by dogman dan
Jan 02 2019 7:42am
Forum: E-Bike General Discussion
Topic: Video of ebike collision - be safe out there!
Replies: 23
Views: 642

Re: Video of ebike collision - be safe out there!

While legally she was at fault. That was entirely your fault that YOU LET HER DO IT. Good that you see that, and have learned that lesson. I had to touch metal to learn it once and for all too. They will do that to you every time, or at least often enough, so for you to overtake her at that moment w...
by dogman dan
Jan 02 2019 7:35am
Forum: E-Bike General Discussion
Topic: Cargo Trike vs Long wheelbase Bike
Replies: 20
Views: 382

Re: Cargo Trike vs Long wheelbase Bike

FWIW, even my longest bike was still plenty nimble for city riding. It was however powered up with a big ass rear motor, making it ride a bit more like a small motorcycle or moped. Cool trick though, for some things, like parking it in the house, that folding shorter. The space it took in my garage ...
by dogman dan
Jan 02 2019 7:26am
Forum: E-Bike General Discussion
Topic: Bigger tire in front?
Replies: 19
Views: 422

Re: Bigger tire in front?

At one point I had a bike with 2.8 inch wide tires on both wheels. I did not like the ride, but this is in sand, or other dry loose dirt type conditions. I found myself fighting the steering a lot, till I went to a 2.3 on the front. Your conditions will be different of course. My particular issue wa...
by dogman dan
Jan 02 2019 7:15am
Forum: Battery Technology
Topic: 48V Charging Issue
Replies: 6
Views: 233

Re: 48V Charging Issue

Its not fully balanced, so stopping early. Plus, always possible a weak cell somewhere fills too fast, stopping the charge on the normal cells early. Spoof your bms to balance it more fully by charging full, then unplug and let it sit a half hour for the discharger in the bms to drain the high cells...