LA Ebike's custom A2Beast, although not as crazy or as powerful as our previous 6000W+ A2Beast. This modestly powered 2000W A2Beast packs quite a punch.
Specs and Upgrade List
Ultra Motor 500W Rear Hub > 1500W Rear Hub Motor 20" x 3
36V 11AH > 48V 20AH Rear Battery
Ultra Motor Controller > 2000W Controller with Display
Integrated headlight and tail light
A faster and more capable A2B
This 2000W A2Beast looks completely stock aside from the wider and more powerful motor. The charging port is retained, it looks and feels like a normal A2B albeit with more power. Top speed is about 35mph @48V, range is 25-35 miles. At LA-Ebike we specialize in custom built, high performance E-bikes.
How did we build the A2Beast?
Removing the Guts
First we removed the old and tired Ultra Motor 500W Rear hub motor. This is a relatively straight forward process.
Then we removed the A2B's internal controller, followed by the 36V 11AH Internal Lithium Ion battery.
We then proceeded to remove the display and throttle, this is a tricky process that involves carefully pulling the wires through the frame, which is often a tight fit.
New power plant
For the A2Beast, we chose to use our EDGE 1500W Rear Hub motor kit in 20" which is paired with our EDGE 3000W Sinewave Controller, although we restricted it to 2000W per customer request. You can check out the kit here.
As for the battery we used the standard A2B rear battery case, although we gutted the battery case and replaced it with our own 48V 20AH Battery system.
This A2B retains the stock look for the ultimately sleeper.
With a top speed of 35mph this A2B will catch unassuming motorists / riders off-guard.
The original charging port is retained, along with the ignition switch. The rear 48V battery is removable just like the original 36V battery.
This A2B upgrade runs about $1500 from start to finish. LA-Ebike fully installs and warranties this upgrade.
Homebuilt Kids Electric Bike Converted to 58mph racer
What started life as a cheap kids electric bicycle gradually became a high voltage, 7.6kw monster.
I picked this bike up off of craigslist for $60. All I knew was that the frame looked perfect for my build, theres a relatively large battery compartment in the middle and the swing arm could be used to house a mid mounted motor.
The original motor is joke, actually most the components are junk except the frame. To date the only thing I kept original is the frame, and and rear wheel. Everything else has either been discarded in the trashed or heavily modified. Footpegs was welded to the frame. The YZ125 seat was modified to fit the frame. Custom bracket was made for the Pit bike brake. Custom motor mounts was welded to the swing arm. The bike does 58mph on 96V and still wants to pull. The motor is by Transmagnetics with a custom high speed winding as my intentions was to build a race bike.
Running on the Street @74V 20AH 7.6Kw Power
Motor Test Run @74V
Mongoose CX24V450W Frame
Zoom DH Fork
Fox Float Rear Shock
20" BMX Wheels
Shinko SR714 Front Tire 16 x 2.25
Pirelli ML75 16 x 2.75
Pit Bike Front Brake Twin Piston Hydraulic
Transmagnetics 4-7Kw Motor w/ Internal cooling fan
Ah my Giant Trance 4, I've had this bike for two years and it has been through at least 4 motors. From its humble beginnings with the Yescomusa 1000W, then to Crystalyte HS3540. Which unfortunately ended with the axle snapping. After a year of sitting outside, I finally decided to resurrect this beast so I decided to put a Bafang BBS02 on it and it was wonderful..for a while. The Bafang BBS02 although very refined, was lacking in overall power. It still felt like a mountain bike which is nice, but I'm use to bikes with much more power. The final straw came when I decided to take it up to the mountains and the motor suddenly began to make loud noises. The search began for a more powerful motor, I wanted motocycle like power for off-roading.
The answer came in the form of a Cyclone 3000W mid drive motor kit which I purchased for testing. I quickly uninstalled my BBS02 and spent the entire day assembling and installing the Cyclone Motor.
Difficulties and Woes
What they say about the Cyclone Motor is true in that it is notoriously difficult to install. The Cyclone motor is no where nearly as easy to install as the Bafang nor is it as refined. I spent 3 hours trying to get the Bottom Bracket to fit because the threads didn't match the ones on my frame. In true Cyclone fashion, instructions are not included. However, since I been wrenching at this for a few days now this is what you need to do to install your Cyclone Kit.
1. Remove bottom bracket, cranks, and pedals.
Now the fun begins
2. Take your Cyclone motor and line it up the motor mount sheets inline with the bottom bracket
3. Install Cyclone bottom bracket through the frame with the end of the bottom bracket cup on the right side (if you are sitting on your bike)
4. Screw in the second part of the bottom bracket via the left side (again if you seated on your bike)
5. Tighten lock ring.
6. Install crankarms.
Note: Chain rings get installed on the right crank arm which has a freewheel on it.
7. Install pedals.
8. Install a chain from the motor sprocket to the rightside chain ring. Use the tensioner to tighten up the slack (I ziptied the spring to the frame)
9. Install bicycle chain ring.
10. Install controller / Throttle / wiring.
11. Note: thin red wire is the ignition wire.
12. Connect battery
13. Make sure chain line is correct
14. Go ride!
Absolute Power Corrupts Absolutely
What a joy the Cyclone Motor is, wheeling uncontrollably in first gear. This motor has brute torque! So far I have been able to conquerer even the steepest hills. Where as the BBS02 slowly crawls up steep inlines, the Cyclone charges up effortlessly. This is equivalent to MX like power, first gear takes me up to 20mph, where as the bafang tops out at 10mph. This gives me a broad like power band in first gear to climb and accelerate hard. You have brute power to smash through the dirt and obstacles like a dirt bike.
I'm running 74V and 40A with the stock controller so currently the motor is putting out 3000Watts, incredible power for off-roading. I can't even pedal to keep up.
I've been riding this bike exclusively on single tracks and its a monster, theres no need to pedal along and the torque is brutal, it can climb steep inclines with ease and accelerates strongly.
When you think of A2B the last thing you think of is speed and performance. This is a custom build for a customer, who came into our shop and he had his mind set on a A2B platform. His goals for this custom build was fairy simple.
-About 35mph Top Speed
-Ability to climb the steep hills on Catalina Island
Needless to say I believe we may over delivered. How does this sound.
-74V Lithium Ion 20AH *Est 50mi range @20-25mph
-50mph Top Speed
-Monsterous torque, along with the small 16" Moped Tires, immense torque is available to climb steep grades.
We started with a well used White A2B metro frame, man this thing needed work, the original ultra motor 350-500W motor was blown. So we quickly tossed that. We had a MXUS 3000W 3T High Speed Wind motor lying around courtesy of my friend at Kinaye Motorsports. We quickly had that laced up to a 20" Alex DX32 which is a nice wide rim. 12G spokes for heavy duty use, but oh no we never intended to put bicycle tires on this bike.
Absolutely gorgeous tires, and gives the appearance of a very aggressive bike. Mounted on the A2B it literally transform the look of the bike into a very muscular Moped look. I have received positive feedback on this build from virtually everyone.
Next was tackling the controller, originally a MXUS 12Fet Sinewave Controller was used, but that controller quickly blew. Apparently due to the low inductance of the High speed wind on the MXUS 3000W motor. The customer was growing impatient with his bike, so I quickly swapped in one of my Greentime 24Fet 84V 80A controllers. Now this controller is a beast I've had it for almost two years now and it was previously used with the Cromotor to hit 50mph as well. I already knew this motor and controller combo would be beastly but I was eagar to try it.
First I tried the phase and hall combo color to color, but no luck the motor would stutter. Another positive feature of the Greentime controller aside from its low cost is that it can run sensorless which makes it a snap to find the right phase and hall combo. Since the motor runs forward colored matched and sensorless, I just swapped the yellow and green hall sensor wires and hazza! The motor spins forward smoothly and effortlessly, now we are in business!
I spent the last two days running wire, soldering, crimping, mounting tires, and etc. But, the pay off was worth it, I plugged in my 84V lipo batteries and was ready to take the bike on its maiden voyage! Wow, what a rush, this motor has power! 6600W of power to be exactly, this bike really pulls now.
In stock form the A2B Metro does about 20mph, but now the A2B Monster does more than twice that speed. I was hitting 48mph before letting off the throttle, it was still pulling! The motor makes such a amazing sound too, sounds like a jet engine on acceleration. Regen was also very strong, especially on smaller wheel diameters the regen effect is amplified but then so is torque and acceleration. I would do most of my braking with regen only, hardly ever necessitating use of the front disc brakes at all. With the regen, even excellent hydraulic disc brakes like the Shimano Zee's are not necessary.
Also the way I used in the regen was that the A2B is already equipped with e-brake cutoff switches, I merely just matched the 2-pin connectors from the e-brake to the controller.
A2B has a hallow frame so it is possible to run wires through the frame for a clean build. You do have to use fish tape and remove the JST connectors before trying to pull them through the frame, as it is narrow. The frame is just too narrow to run a large battery pack inside. We decided to go with a custom aluminum battery box in the rear.
MXUS 3000 is had a severe internal short is now being replaced another 3000W motor currently used in testing. 42mm stator. Much thicker phase wires and dual hall sets. Performance is very similar to mxus if not more torque.
Sabvoton Sinewave controller was added to replace the Greentime Controller which was having issues. Since the MXUS motor shorted out, it may have damaged the controller. The Sabvoton Sinewave controller is a fantastic controller, now the throttle is silky smooth, bike runs virtually silent, and regen is more controllable. This controller is capable of 150A battery amps and 350A phase amps. Very easy to program, including regen strength and flux weakening which increases top speed. The battery box is now a 2 piece design, as the customer wants to be able to remove the battery on and off for external charging.
Videos and more pics to come as the bike reaches completion. This is one of our fastest bikes in the shop and represents our commitment and dedication to high performance electric bikes.