Search found 13374 matches

by John in CR
Jan 20 2019 6:36pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Suzuki GSX-R e899 K2
Replies: 310
Views: 30828

Re: Suzuki GSX-R e899 K2

Rovii wrote:
Jan 20 2019 12:43pm
...My daily cycle has only pedals, I am my own motor 🤣
Sorry to hear that unless you live where there's great cycling infrastructure. No way I'd pedal here...far too dangerous.
by John in CR
Jan 20 2019 11:03am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Suzuki GSX-R e899 K2
Replies: 310
Views: 30828

Re: Suzuki GSX-R e899 K2

As far as I know you own the top speed of any hubmotored 2 wheeler. The highest I ever recorded with my daily rider was 172kph, and it had a bit more since it was still accelerating when I let off the throttle. Plus it wasn't at full charge. My newer ebike is running the same motor with a 6% larger...
by John in CR
Jan 20 2019 12:30am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Suzuki GSX-R e899 K2
Replies: 310
Views: 30828

Re: Suzuki GSX-R e899 K2

As far as I know you own the top speed of any hubmotored 2 wheeler. The highest I ever recorded with my daily rider was 172kph, and it had a bit more since it was still accelerating when I let off the throttle. Plus it wasn't at full charge. My newer ebike is running the same motor with a 6% larger ...
by John in CR
Jan 17 2019 7:03pm
Forum: E-Bike Technical
Topic: Wiring harness ideas
Replies: 8
Views: 308

Re: Wiring harness ideas

I too am in the no connector camp. The only connectors on most of my bikes are charge plugs, though 2 have bolt together ring connectors on the power mains and phases just because I didn't want the heat of soldering heavy gauge wires too close to other wiring. The initial wiring takes only slightly ...
by John in CR
Jan 16 2019 8:22pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1399
Views: 163323

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Any accurate discussion of what a motor can run at without including the gearing (wheel diameter for hubbies), total load, and terrain, isn't worth its pixels displayed.
by John in CR
Jan 15 2019 6:28pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Let's design a body for a Rhoades Car
Replies: 65
Views: 2498

Re: Let's design a body for a Rhoades Car

...OP wasn't so serious, so we were free to roam. Obvoiusly some of us WANT to. . . . Exactly, I'd like to be out of the rain this rainy season, so 4-5 months to go is plenty of time for me if I get started soon. Sleek through the wind and easy in-n-out are my priorities, since pedals aren't a requ...
by John in CR
Jan 15 2019 6:09pm
Forum: Motor Technology
Topic: Room temperature superconductors
Replies: 6
Views: 182

Re: Room temperature superconductors

Bill, Where did you find the info that superconductors also have great thermal conductivity coefficients? Some quick research indicates that the opposite is true for know superconductors, ie they're good thermal insulators. Whether or not it's a good thermal conductor isn't important though, since a...
by John in CR
Jan 11 2019 4:43pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Let's design a body for a Rhoades Car
Replies: 65
Views: 2498

Re: Let's design a body for a Rhoades Car

I didn't realize Twike came out with a sportier more eye candy version. I'd like to do something with the looks of the one on the right as a leaning delta, so it could be higher and narrower. For passengers, I have no issue with going inline seating. I want narrow enough to split traffic, and 3 whee...
by John in CR
Jan 10 2019 9:44pm
Forum: E-Bike Build Threads / Photos & Video
Topic: MadAss donor bike result
Replies: 4
Views: 210

Re: MadAss donor bike result

I wish I had their electric, or even the 49cc version to start, because most of the components I used from the factory bike, the swingarm, and front end are particularly heavy. The headtube, bars, forks, fork tree, brake, and front wheel weigh something like 35kg. If I recall correctly the whole thi...
by John in CR
Jan 10 2019 9:27pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Mid-mount Hubmonster Madass
Replies: 73
Views: 11828

Re: Mid-mount Hubmonster Madass

"Dereliction of the common interest", what a bunch of BS. Your typical liberal stance on everything that somehow bigger government and more regulation is good couldn't miss the target more. Gag me. Overt, over-the-top, mean-spirited politics belong elsewhere. With so much angst against your fellow ...
by John in CR
Jan 09 2019 10:31pm
Forum: E-Bike Build Threads / Photos & Video
Topic: MadAss donor bike result
Replies: 4
Views: 210

MadAss donor bike result

Here's one of the ebikes I've been riding for the past 9 months. I posted here in the ebike photo section, since here this legally qualifies as a motorized bicycle despite having moto components, no pedals, and being capable of well over 100. The battery pack is 31s or 115V nominal, 128 fresh off th...
by John in CR
Jan 09 2019 10:08pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Mid-mount Hubmonster Madass
Replies: 73
Views: 11828

Re: Mid-mount Hubmonster Madass

Here's what she looks like after 9 months of running with only the one mistake going slow up a crazy steep hill with an extra 100lb or so aboard. I pegs were a bit high and forward, so I modded that bracket when I opened the bottom up to change the blown controller. I'm pleased with it so far, and s...
by John in CR
Jan 09 2019 9:45pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Big 100 Volt 54 ah Battery build
Replies: 11
Views: 346

Re: Big 100 Volt 54 ah Battery build

Solder the nickle strip to your copper wire and then tab weld to the cells. Why build a pack with 250 cycle cells anyway? I went to automotive grade cells years ago. I did the soldering stuff for a long time and would never go back. Higher power, longer life, much better safety, and either already a...
by John in CR
Jan 09 2019 8:33pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Big 100 Volt 54 ah Battery build
Replies: 11
Views: 346

Re: Big 100 Volt 54 ah Battery build

All that work and money to build a battery, so get a tab welder to make the final connection to the cells. More than likely it's heat damage from soldering that hurt performance of your original pack. I certainly wouldn't go to all that time and expense to build a pack that is suspect from the start...
by John in CR
Jan 04 2019 11:43pm
Forum: E-Bike Build Threads / Photos & Video
Topic: 55.2kw bicycle
Replies: 36
Views: 1852

Re: 60kw bicycle

I put 30-31kw into a 50 wide 273 with a Kv of 18+rpm/v in a 19.5"OD wheel with a 20s lipo pack. That's minimum voltage (74V when fully charged at 84V) X peak battery current (420A). Even with the 6" extended swingarm and a low bike, I had to hang my 275lbs (down to 210lb now thank goodness) out over...
by John in CR
Nov 29 2018 10:05pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Let's design a body for a Rhoades Car
Replies: 65
Views: 2498

Re: Let's design a body for a Rhoades Car

Nice one Dauntless. That's the kind of thing I've been hoping would pop up in this thread. While I'd be perfectly fine with exactly that without the gasser grill, where are the artsy design types when we need them to take that 3 wheeler and give it a bit of modern touch and better ergonomics for a r...
by John in CR
Nov 29 2018 9:55pm
Forum: E-Bike Technical
Topic: Elegant solution for 72v main power switch
Replies: 15
Views: 879

Re: Elegant solution for 72v main power switch

Elimination of unnecessary components is always the most elegant solution to me. I definitely see the appeal of this approach. Even my 20-30kw builds don't have or need main power switches 20-30kw? Wow, that's serious power! What voltages are these builds operating at? I'm using a Phaserunner on my...
by John in CR
Nov 29 2018 9:35pm
Forum: E-Bike Technical
Topic: Elegant solution for 72v main power switch
Replies: 15
Views: 879

Re: Elegant solution for 72v main power switch

If your motor is a 3 phase brushless, then there should be no need for a main power switch. Instead put a simple, cheap, reliable key switch on the low power input to the controller's logic section of the controller. Are there no possible fail-on modes for brushless controllers? Without power to th...
by John in CR
Nov 29 2018 8:56pm
Forum: Motor Technology
Topic: wich choice motor qs273
Replies: 5
Views: 333

Re: wich choice motor qs273

the wheel size is 18 inch wich better 18 or 19inch? 16 or 17. Smaller wheel diameter is always better with direct drive hubbies unless you're primary use is longer distances at relatively constant high speed, but it's pretty rare that the savings in core losses of a lower rpm for a given speed exce...
by John in CR
Nov 06 2018 8:58pm
Forum: E-Bike Technical
Topic: Elegant solution for 72v main power switch
Replies: 15
Views: 879

Re: Elegant solution for 72v main power switch

If your motor is a 3 phase brushless, then there should be no need for a main power switch. Instead put a simple, cheap, reliable key switch on the low power input to the controller's logic section of the controller. Even my 20-30kw builds don't have or need main power switches. Safety features incl...
by John in CR
Oct 24 2018 12:32am
Forum: E-Bike Technical
Topic: Known to Work Brushless Motor/Controller Wiring Diagrams
Replies: 135
Views: 50540

Re: Known to Work Brushless Motor/Controller Wiring Diagrams

I've read thru all the diagrams people have posted.& can't seem to find the diagram Im after. anyone running a q.s v3 motor with crystalytes 72v 60amp controller.. thanks in advance. So much time wasted on something I'd never trust anyway. With a few alligator clip jumper wires it's so easy to be c...
by John in CR
Oct 20 2018 10:45pm
Forum: E-Bike General Discussion
Topic: Lines erased E-Bike / E-Scooter / E Motorcycle
Replies: 247
Views: 6673

Re: Lines erased E-Bike / E-Scooter / E Motorcycle

This thread might as well be a debate about helmets, with one side being unwilling or incapable of a complete risk assessment that doesn't fit their preconceived notions. Conditions dictate what speed is or isn't safe.
by John in CR
Oct 15 2018 3:04pm
Forum: E-Bike General Discussion
Topic: Lines erased E-Bike / E-Scooter / E Motorcycle
Replies: 247
Views: 6673

Re: Lines erased E-Bike / E-Scooter / E Motorcycle

Those motorcycle statistics are badly distorted by idiot riders, and that's whether they're riding like asses or simply riding in an insufficiently alert and defensive manner. I'll take riding at traffic speeds in a manner where my survival is up to me riding mistake-free over being a slow moving ob...
by John in CR
Oct 12 2018 8:22pm
Forum: E-Bike Technical
Topic: Best rear torque arm design/layout?
Replies: 18
Views: 961

Re: Best rear torque arm design/layout?

If you use regen braking, then torque arms that clamp onto the axle are the only acceptable type using anything above very modest power. All non-clamping types will eventually deform or worse, deform the axle, resulting in a loose fit and rocking motion of the axle in the dropout. Any exceptions req...
by John in CR
Sep 15 2018 10:25pm
Forum: E-Bike General Discussion
Topic: Disadvantages of higher Battery Voltage
Replies: 38
Views: 1468

Re: Disadvantages of higher Battery Voltage

I find that the fun factor increase of running higher voltage for a given system far outweighs any detriment. 31s with the smallest wheel I could find with over 100 foot-pounds of torque with a pretty flat curve up through 80kph due to current limiting, and a top speed around 115kph depending on SOC...