Search found 686 matches

by LeftieBiker
Aug 12 2020 5:12pm
Forum: E-Bike General Discussion
Topic: Why are geared motors worse than direct drive for climbing hills?
Replies: 52
Views: 2041

Re: Why are geared motors worse than direct drive for climbing hills?

Given the criticality of fit in this application, do you think it would be better to make to hole very slightly too small, and hand file it to fit? I am an inexperienced metalworker, but have patience and can follow instructions. It's always better to adjust to fit by slowly filing than to have to ...
by LeftieBiker
Aug 11 2020 8:29am
Forum: Battery Technology
Topic: Forklift Battery Reconditioning
Replies: 2
Views: 81

Re: Forklift Battery Reconditioning

I supposed you could try a 12 volt de-sulphating charger, and if the voltage climbs to 13 volts, switch to the normal charger.
by LeftieBiker
Aug 11 2020 2:34am
Forum: E-Bike General Discussion
Topic: E-bike for 2 grand ?
Replies: 23
Views: 336

Re: E-bike for 2 grand ?

I had just remembered, and came back to add that. Yes, it was the Giant LA Free Sport Slope I bought and regretted. Giant Taiwanese manufacturer lays giant egg...
by LeftieBiker
Aug 11 2020 1:37am
Forum: E-Bike General Discussion
Topic: E-bike for 2 grand ?
Replies: 23
Views: 336

Re: E-bike for 2 grand ?

I know almost every reputed bicycle manufacturers in the world, but never heard of LA Free Sport. I bought it in 2000. (Sport was the model.) Back then the options were fewer, and I had a couple of specific needs, having damaged a knee riding an unassisted bike for long distances for years. I bough...
by LeftieBiker
Aug 10 2020 6:26pm
Forum: General Discussion
Topic: How long do your matresses last?
Replies: 5
Views: 174

Re: How long do your matresses last?

Cheap one: 8 years. More expensive ones: 10+ years.
by LeftieBiker
Aug 10 2020 4:31pm
Forum: E-Bike General Discussion
Topic: E-bike for 2 grand ?
Replies: 23
Views: 336

Re: E-bike for 2 grand ?

Then, I am not saying all Chinese bikes are sh*t, only all sh*t bikes are Chinese. No. My first bike (LA Free Sport) was from an American company, with parts made in Taiwan. It was utter crap. I see $5k bikes with no suspension and mediocre drivetrains that are just cash cows for those who sell the...
by LeftieBiker
Aug 10 2020 7:14am
Forum: E-Bike General Discussion
Topic: E-bike for 2 grand ?
Replies: 23
Views: 336

Re: E-bike for 2 grand ?

This bike uses many of the components of the one I ride. My Magnum Metro came with a noisy motor (possibly shipping damage) but it's held together for 3,000 miles and it has many nice attributes. The bike I'm linking has more capacity, mechanical disks instead of the hydraulics on mine, but it's ver...
by LeftieBiker
Aug 09 2020 3:28pm
Forum: Battery Technology
Topic: downsides to a higher voltage
Replies: 17
Views: 313

Re: downsides to a higher voltage

Going up into the hundreds of volts, there start to be some downsides, like dying etc.
The risk of an ebike killing you starts much lower than that - at about 60 volts.
by LeftieBiker
Aug 08 2020 5:44am
Forum: Battery Technology
Topic: What's the longest period of time you can store a Li-Ion pack?
Replies: 29
Views: 446

Re: What's the longest period of time you can store a Li-Ion pack?

Also, and this should be #1: if you can't charge the pack occasionally, disconnect the BMS! If left connected it will slowly drain the pack to power itself.
by LeftieBiker
Aug 07 2020 10:08pm
Forum: E-Vehicles General Discussion
Topic: A help me upgrade my scooter
Replies: 2
Views: 73

Re: A help me upgrade my scooter

Is the range good? The first, cheapest thing to try is a controller that feeds the motor more power. It then remains to be seen if the hubmotor will happily use more current to produce a bit more speed, or not. If the batteries are junk, producing a lot of voltage sag under load and poor range, then...
by LeftieBiker
Aug 06 2020 7:50am
Forum: E-Bike Technical
Topic: What is the voltage sag on your ebike?
Replies: 10
Views: 1624

Re: What is the voltage sag on your ebike?

My SLA EZIPs had an estimated sag of about 4 volts under full load - more in Winter. The sag dropped to maybe 2-3 volts with Ping packs, and the Samsung (?) powered pack on my Magnum Metro only sags about 2 volts - although there is now significant, rapid, non-load voltage drop when it's near full, ...
by LeftieBiker
Aug 05 2020 3:03pm
Forum: Motor Technology
Topic: Rear hub motor selection advice
Replies: 4
Views: 172

Re: Rear hub motor selection advice

Hi Guys Thanks for the heads up. I did do a quick search and I know you will always find negative rather than positive remarks but there are a lot of negative remarks and absolutely no positive. I will try for another option. Cheers Rob What negatives did you find other than mine, just out of curio...
by LeftieBiker
Aug 05 2020 12:34am
Forum: E-Bike General Discussion
Topic: Tyres for commuter bike ? Schwalbe Marathon + disaster
Replies: 24
Views: 419

Re: Tyres for commuter bike ? Schwalbe Marathon + disaster

I have Schwalbe Big Bens on my bike, and they are still fine after...3000 miles?
by LeftieBiker
Aug 02 2020 1:22am
Forum: E-Bike General Discussion
Topic: Do I really need a switch for the battery if I have a controller switch?
Replies: 20
Views: 514

Re: Do I really need a switch for the battery if I have a controller switch?

If you don't want a switch, you can put a fuse on the battery + lead. That's a good idea anyway, and you can always remove the fuse for a total power-off.
by LeftieBiker
Jul 31 2020 11:31pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: What is the optimum build for a long range light motorbike/ebike?
Replies: 18
Views: 391

Re: What is the optimum build for a long range light motorbike/ebike?

I am not quite convinced that air drag can affect the distance so much considering everything else remained the same. In a near-vacuum, this would be quite true. On Earth, though, near sea level, air resistance is the main factor in power consumption, once you get above, say, 25MPH. Air drag matter...
by LeftieBiker
Jul 31 2020 5:47pm
Forum: Motor Technology
Topic: Rear hub motor selection advice
Replies: 4
Views: 172

Re: Rear hub motor selection advice

I have what I believe is the same Das Kit motor in my Magnum Metro. The good: plenty of power and speed. The Bad: it got fairly noisy soon after I got the bike, and has been noisy ever since. Several different noises, actually. At least it still works, after 2 years of use and about 3k miles. I just...
by LeftieBiker
Jul 27 2020 6:33am
Forum: Battery Technology
Topic: Batteries for UPS
Replies: 4
Views: 152

Re: Batteries for UPS

All other things being equal, I would get the LiFePo4 batteries. I've had two Ping packs for 7 and 6 years, and they are still fine. I would try to set it up so they are only charged to about 80% of full capacity if possible. Lithium batteries are fine with sitting unused, but not so fine about sitt...
by LeftieBiker
Jul 26 2020 5:38pm
Forum: E-Bike General Discussion
Topic: New 52V21Ah battery was stored for 30 days fully charged. How bad is it?
Replies: 21
Views: 737

Re: New 52V21Ah battery was stored for 30 days fully charged. How bad is it?

I suspect that the purpose of those lights is to encourage people to run the vehicle at less than 100% SOC. I get 4 (all) lights green at about 80% SOC and that's plenty of charge for most rides. Since they are built into a modern lithium pack I don't think they were meant for SLA packs.
by LeftieBiker
Jul 26 2020 5:36pm
Forum: Large EV General Discussion
Topic: running nissan leaf on 100v
Replies: 3
Views: 331

Re: running nissan leaf on 100v

The Leaf's pack voltage is 360+ volts. The car would perceive 100 volts as a dead pack.
by LeftieBiker
Jul 26 2020 1:58pm
Forum: E-Bike General Discussion
Topic: New 52V21Ah battery was stored for 30 days fully charged. How bad is it?
Replies: 21
Views: 737

Re: New 52V21Ah battery was stored for 30 days fully charged. How bad is it?

I keep my packs at 50-75% so if I need them full or near full I only need to charge for an hour or at most two before leaving. I have yet to wear out a lithium pack.
by LeftieBiker
Jul 26 2020 6:59am
Forum: E-Bike General Discussion
Topic: New 52V21Ah battery was stored for 30 days fully charged. How bad is it?
Replies: 21
Views: 737

Re: New 52V21Ah battery was stored for 30 days fully charged. How bad is it?

Maybe the BMS is set to limit the full charge to something less than 100%. Lights on the pack don't mean that much: the four lights on mine are all lit at about 80% charge. Anyway, you can make up for whatever loss occurred by taking the extra step of only charging to full right before you use the b...
by LeftieBiker
Jul 25 2020 3:21pm
Forum: General Discussion
Topic: Quiet Affordable Heat Gun?
Replies: 7
Views: 491

Re: Quiet Affordable Heat Gun?

The $20 Harbor Freight one I have isn't particularly loud. It has two settings, 750 and 1500 watt, IIRC. It does stink of burning oil for the first few uses, though.
by LeftieBiker
Jul 23 2020 12:17am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Electric motorcycle check list?
Replies: 8
Views: 691

Re: Electric motorcycle check list?

Max range- probably like 100 miles, I live on Long island so nothing is too far, I don't expect to go cross country any time soon! Max speed- 60 is the min, but the ability to go to 100 or so would be a cool pissing contest ya feel I hope that you realize that these are either/or parameters, unless...
by LeftieBiker
Jul 21 2020 8:59pm
Forum: Stand-up E-scooters and E-skateboards
Topic: Upgrade recommondation?
Replies: 6
Views: 355

Re: Upgrade recommondation?

The gear reduction is the #1 thing to do to improve the performance. As for batteries, in between the heavy, sluggish SLA batteries and the powerful but dangerous R/C batteries, there are several types of lithium batteries you can use to replace the SLA pack and get more performance, more range, and...
by LeftieBiker
Jul 19 2020 5:28pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Electric motorcycle check list?
Replies: 8
Views: 691

Re: Electric motorcycle check list?

Given that you are new to this, you don't want to build a frame. As noted it may also be necessary to use an existing bike for ease of registration. So after you compile that list of What The Bike Must Do you should then look for input as to what commonly available gas bike frames would support a dr...