Search found 81 matches

by matt912836
Sep 17 2019 5:09pm
Forum: E-Bike Non-hub Motor Drives
Topic: Breaking all the rules - cyclone dirt bike build
Replies: 10
Views: 1031

Re: Breaking all the rules

Finally decided to lace up that hub, just had to drill the spoke holes for 10g spokes... anyone who is curious to see just how much abuse a 3 speed hub can take, stay tuned :twisted: https://i.ibb.co/bdZvyNz/20190917-172909.jpg I had to keep the derailleur as a chain tensioner, as the chain legnth s...
by matt912836
Aug 25 2019 10:33am
Forum: E-Bike Non-hub Motor Drives
Topic: Breaking all the rules - cyclone dirt bike build
Replies: 10
Views: 1031

Re: Breaking all the rules

I hope you have better luck with your SA hub than I have. I am about to take mine off and throw it in a dumpster. I give the hub maybe 5 minutes of your riding haha. Maybe the 3 speeds are stronger? I'm relying on the 3 speeds supposedly being extra durable.. Since you don't have pedals I'd ditch t...
by matt912836
Aug 24 2019 7:38am
Forum: E-Bike Non-hub Motor Drives
Topic: Breaking all the rules - cyclone dirt bike build
Replies: 10
Views: 1031

Re: Breaking all the rules

Very cool bike. Seems like youre having lots of fun with this build. Appreciate the comments! This is definitely my funniest ebike build to date. The power to weight ratio is just insane! Yeah, add a new chain and a new sprocket/chainring at the same time. You may not have had a bad chain-drop unde...
by matt912836
Aug 23 2019 3:29am
Forum: E-Bike Non-hub Motor Drives
Topic: Breaking all the rules - cyclone dirt bike build
Replies: 10
Views: 1031

Re: Breaking all the rules

I think I'm due for a fresh chainring :lol: :twisted: this is the same one I've been using over a year now but it definitely was no where near this bad last time I had a look at i5 https://i.ibb.co/6mvdjqd/20190823-041559.jpg Only reason I even noticed is because the chain guard cracked off...I'm am...
by matt912836
Aug 23 2019 3:23am
Forum: E-Bike Non-hub Motor Drives
Topic: Breaking all the rules - cyclone dirt bike build
Replies: 10
Views: 1031

Breaking all the rules - cyclone dirt bike build

Kona Stinky frame Cyclone 3000w motor 72v 50 amp 20ah battery 72v 50a controller Full motocross body kit and seat 7 speed freewheel but using bigger gears only, you reach top speed in 4th gear anyway. I'm amazed at how cheapie 7 speed chain has been holding up This thing ripped. As long as your dera...
by matt912836
Aug 23 2019 1:48am
Forum: E-Bike Non-hub Motor Drives
Topic: new cyclone 3000 w mid-drive kit?
Replies: 3300
Views: 415629

Re: new cyclone 3000 w mid-drive kit?

I don't think 90v is the way to go, just shunt it to 60 or 70a. Afaik the 40 and the 60 are identical inside, and the 60 can be modded to 70-80. I would do that but A. My battery is already maxed at 50 amps. I could on the other hand add more in series but keep it at 50 amps for more power. 22s wou...
by matt912836
Aug 22 2019 1:05pm
Forum: E-Bike Non-hub Motor Drives
Topic: new cyclone 3000 w mid-drive kit?
Replies: 3300
Views: 415629

Re: new cyclone 3000 w mid-drive kit?

Has anyone ever modified one of these yuyangking controllers for higher voltage? I have the black 72v 40a bluetooth controller, currently shunt modded for 50 amps peaks. I want to go 22s for a touch more RPMs. Basically I want it to be able to reach the speeds it achieves with flux weakening (3rd sp...
by matt912836
Jun 27 2019 10:07am
Forum: E-Bike General Discussion
Topic: Qs205 getting hot after hall sensor replacement
Replies: 12
Views: 835

Re: Qs205 getting hot after hall sensor replacement

Motor just caused my sabvoton to fail... wired it up to a regular square wave controller with automatic hall sensor and phase setup so theres no possibility of false positive .. this controller only puts out 30 amps for around 2500w maxx and the motor still heats up to a very hot temperature after a...
by matt912836
Jun 23 2019 8:47am
Forum: E-Bike General Discussion
Topic: Qs205 getting hot after hall sensor replacement
Replies: 12
Views: 835

Re: Qs205 getting hot after hall sensor replacement

When the motor gets hot then you should have overheating protection and not over current that can mean two things. if you were not monitoring your motors temperature at the past not to be more than 140C then maybe the windings have started to fail melt down and the resistance is lower so it's harde...
by matt912836
Jun 23 2019 8:42am
Forum: E-Bike General Discussion
Topic: Qs205 getting hot after hall sensor replacement
Replies: 12
Views: 835

Re: Qs205 getting hot after hall sensor replacement

test resistance of each phase How does one do that? Set the multimeter to OHM Test motor big yellow wire with motor big green wire Test motor big yellow wire with motor big blue wire Test motor big blue wire with motor big green wire Test each of them motor phase wires with the motor axle No resist...
by matt912836
Jun 22 2019 10:24pm
Forum: E-Bike General Discussion
Topic: Qs205 getting hot after hall sensor replacement
Replies: 12
Views: 835

Re: Qs205 getting hot after hall sensor replacement

The most likely thing is that (even if you don't think it happened) during the replacement, two of the hall signal wires were swapped, in a way that resulted in a false positive, which spins normally, but takes a lot more current, and gets hot. With a particular controller and motor, there are thre...
by matt912836
Jun 18 2019 10:13am
Forum: E-Bike General Discussion
Topic: Qs205 getting hot after hall sensor replacement
Replies: 12
Views: 835

Qs205 getting hot after hall sensor replacement

I've been running a qs205 with my sabvoton 72080 flawlessly for quite some time. One day the halls failed on me in a heavy rain situation...and I was already on my spare set. Finally got around to replacing the halls but now I have a new problem. Now my motor gets very hot under any heavy riding, ev...
by matt912836
Jun 03 2019 10:40am
Forum: E-Bike Non-hub Motor Drives
Topic: new cyclone 3000 w mid-drive kit?
Replies: 3300
Views: 415629

Re: new cyclone 3000 w mid-drive kit?

Ideas? The motor is made for bottom dollar by people who don't care that much and you slightly damaged some insulation / started to connect a winding to the stator or another winding when the internals were shocked / moved around slightly upon crashing. Happens all the time in these cheap chinese m...
by matt912836
May 31 2019 4:07pm
Forum: E-Bike Non-hub Motor Drives
Topic: new cyclone 3000 w mid-drive kit?
Replies: 3300
Views: 415629

Re: new cyclone 3000 w mid-drive kit?

Ideas? The motor is made for bottom dollar by people who don't care that much and you slightly damaged some insulation / started to connect a winding to the stator or another winding when the internals were shocked / moved around slightly upon crashing. Happens all the time in these cheap chinese m...
by matt912836
May 31 2019 7:13am
Forum: E-Bike Non-hub Motor Drives
Topic: new cyclone 3000 w mid-drive kit?
Replies: 3300
Views: 415629

Re: new cyclone 3000 w mid-drive kit?

Hoping i could get some help diagnosing a problem with my 3000w cyclone motor after a small crash. I've had this thing as reliable as can be for a a lot longer than I expected for now. Once I got all the chain and crank alignment issues sorted, I've been running full 72v 40a power with no problem. 4...
by matt912836
Apr 30 2019 7:32am
Forum: Items Wanted
Topic: Qs205 freewheel side cover
Replies: 0
Views: 310

Qs205 freewheel side cover

Anybody have a free wheel side cover for a 50h qs205 they can sell??
by matt912836
Dec 24 2018 1:06pm
Forum: E-Bike General Discussion
Topic: Persecuting E-Bikes in New York City
Replies: 220
Views: 23536

Re: Persecuting E-Bikes in New York City

What I find is that they mostly go after the typical delivery guy ebike. I don't think they bother with the super ebikes. It seems that right now there are more ebikes in Manhattan than ever before. I notice them everywhere but they are not a problem as they stay in the streets. I wonder how they e...
by matt912836
Dec 05 2018 4:25pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Yz-EEB *5000w, 50mph, mx style*
Replies: 20
Views: 3869

Re: Yz-EEB *5000w, 50mph, mx style*

Looks great! I thought NYC cops hated ebikes and were confiscating them until the law recently changed. They were targeting poor food delivery riders. That's a pretty cool spin on the EEB style frame. That is a monster of a battery pack! I like seeing different cells. 8) Appreciate all your comment...
by matt912836
Dec 05 2018 8:31am
Forum: E-Bike Build Threads / Photos & Video
Topic: Yz-EEB *5000w, 50mph, mx style*
Replies: 20
Views: 3869

Re: Yz-EEB *5000w, 50mph, mx style*

10min straight highway run 50mph+ The ONLY setup i woud feel comfortable doing this with! Heavy hub and heavy bike with huge battery means stability and reliability. Absolutely NO room for mechanical parts to fail or electric parts to struggle and overload on an NYC highway! https://www.instagram.co...
by matt912836
Nov 06 2018 5:26pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Full suspension low diameter hub build
Replies: 10
Views: 2482

Re: Full suspension low diameter hub build

Wow, you didn't even have to modify the swingarm.. Kinda jealous. I haven't been able to find a frame that's compatible ( with some modification ) with 20" wheels AND is an extra large size. What's your top speed these days? ever find the limit of that motor? :) Sad to say this bike was involved in...
by matt912836
Nov 05 2018 3:43pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Yz-EEB *5000w, 50mph, mx style*
Replies: 20
Views: 3869

Re: Yz-EEB *5000w, 50mph, mx style*

Havent updated in a while.. Heres before I swapped the panels out for Vector side panels.. https://preview.ibb.co/fExFOL/20181029-111245.jpg And after. Note the side panels do not fit straight away, they have to be modified to fit. https://preview.ibb.co/hOpjHf/20181101-194225.jpg Made a 72v 53ah ba...
by matt912836
Nov 05 2018 8:29am
Forum: E-Bike Build Threads / Photos & Video
Topic: Full suspension low diameter hub build
Replies: 10
Views: 2482

Re: Full suspension low diameter hub build

2x nes-350-27 meanwells in series set to 29v for a simple 58v12a charger. How do you like the Mean Well NES psu's? Did they come out of the box already ground isolated or did you modify it so it was isolated? How are they holding up? Have they taken many falls and survived? mcintyretj has the NES m...
by matt912836
Aug 31 2018 9:20pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Noob EEB Enduro Build
Replies: 87
Views: 10058

Re: Noob EEB Enduro Build

With that controller and performance goal I would definitely look for a higher capacity battery capable of higher continuous discharge :!:
by matt912836
Aug 27 2018 11:59am
Forum: Items for Sale - New
Topic: Boston Swing 5300 mAh and cell holders. Now ship to Canada, Mexico and others maybe.
Replies: 11
Views: 1959

Re: Boston Swing 5300 mAh and cell holders. Free shipping 20 battery U.S. Only

They definitely do perform right to spec as expected! A few pic of my soldering process. All it took was to create a tiny gap between the nickel strip welded on the positive side and the actual aluminum casing of the battery. A razor blade was perfect for this. It actually made soldering the positiv...
by matt912836
Aug 10 2018 4:14pm
Forum: Items for Sale - New
Topic: Boston Swing 5300 mAh and cell holders. Now ship to Canada, Mexico and others maybe.
Replies: 11
Views: 1959

Re: Boston Swing 5300 mAh and cell holders. Free shipping 20 battery U.S. Only

Took a dive and ordered 200 cells from headrc. Paid through PayPal, and he shipped the batteries promptly. 2 days later these are sitting on my desk: https://thumb.ibb.co/fSmVT9/20180810_170357.jpg https://thumb.ibb.co/dRdzMU/20180810_170351.jpg 7 packs of 28 cells neatly packaged, plus 4 on the sid...