G-Bike City- Electric Scooter 48V dropping out. G bike electric scooter

Laws for Pedestrians, Bikes, E-Bikes and E-Scooters

Long Beach Municipal Code

Riding on Sidewalks. Prohibited Areas (LBMC 10.48.070 A) No person shall ride a bicycle upon a sidewalk within the following areas:

  • Any business district
  • Sidewalks of bridges
  • Pedestrian underpasses or overpasses
  • Sidewalks adjacent to any school building, church, recreation center, playground, or senior citizens’ residential development
  • Within the area south of Ocean Boulevard between the Long Beach Museum of Art on the west and Bluff Park on the east;
  • On the northern side of the Downtown Marina Mole (south of Shoreline Village) between Gangway A and Gangway P.

Riding on Sidewalks. Pedestrians (LBMC 10.48.070 B) Bicyclists riding on the sidewalk must yield to any pedestrian, and when overtaking and passing a pedestrian, shall give an audible signal and pass to the left of the pedestrian only under conditions permitting such movement in safety.

Riding on Sidewalks. Additional Sidewalks (LBMC 10.48.070 D) The following public ways shall be considered sidewalks:

  • Seaside Walk south of Ocean Boulevard between 59th Place and and 69th Place, known as the Boardwalk
  • Bay Shore Walk north of Ocean Boulevard between 55th Place and 69th Place

Riding on Sidewalks. Officers Exempt (LBMC 10.48.070 E) Section 10.48.070 shall not apply to a bicycle operated by any officer employed by the City while on duty.

California Vehicle Code

Bicyclist Rights (CVC 21200) Bicyclists have all the rights and responsibilities of vehicle drivers.

Alcohol and Drugs (CVC 21200.5)It is against the law to ride a bicycle while under the influence of alcohol or drugs.

Equipment (CVC 21201 and 21204)Bicycles must be equipped with at least a brake which allows operators to execute to a wheel skid on dry, level, clean pavement. Handlebars must not be higher than the rider’s shoulders. Bicycles must be small enough for the rider to stop, support it with one foot on the ground, and restart safely. At night, bicycles must be equipped with a white headlight or white light attached to the rider and visible from the front. Bicycles must also have a rear red reflector and white or yellow pedal reflectors. There must be a white or yellow reflector on the front of the bicycle visible from the side, and a red or white reflector on the rear of the bicycle visible from the side. All riders must have a permanent, regular seat. Bicycle passengers less than 40 lbs. must have a seat which retains them in place and protects them from moving parts.

Use of the Roadway (CVC 21202) Bicycles traveling slower than the normal speed of traffic must ride as close to the right side of the road as practicable except: when passing, preparing for a left turn, to avoid hazards and dangerous conditions or if the lane is too narrow.

Bicycle Path Crossing (CVC 231.6) A “bicycle path crossing” is the prolongation or connection of the boundary lines of a bike path where the intersecting roadways meet at approximately right angles. Or any portion of a roadway distinctly indicated for bicycle crossing by lines or other markings on the street surface.

Hitching Rides (CVC 21203) Bicyclists may not hitch rides on vehicles.

Carrying Articles (CVC 21205) Bicyclists may not carry items which keep them from using at least one hand upon the handlebars.

Motorized Bicycles (CVC 21207.5) Motorized bicycles may not be used on bike paths or trails, bike lanes, or other bikeways.

Bicycle Lane Use (CVC 21208) Bicyclists traveling slower than traffic must use bike lanes except when making a left turn, passing, or avoiding hazardous conditions.

Obstruction of Pedestrians (CVC 21210) Bicyclists may not leave bicycles on their sides on the sidewalk or park bicycles in a manner which obstructs pedestrians.

Bikeway Obstruction (CVC 21211) No one may stop on or park a bicycle on a bicycle path.

Helmets (CVC 21212) Bicyclists and passengers under age 18 must wear an approved helmet when on a bicycle.

Direction of Travel (CVC 21650) Bicyclists must travel on the right side of the roadway in the direction of traffic.

3-Feet for Safety Act (CVC 21760) When passing a bicyclist, drivers of motor vehicles must provide bicyclists with a three feet buffer between their motor vehicle and the bicyclist. If roadway conditions do not allow for a three feet buffer, the driver must slow down when passing a bicyclist.

Toll Bridges (CVC 23330) Bicyclists may not cross a toll bridge unless permitted by signs.

Headphones (CVC 27400) Bicyclists may not wear earphones in both ears or a headset covering both ears, except hearing aids.


California Vehicle Code

Bicycle Lane Use (CVC 21229) E-scooter riders must use a bike lane when one is provided.

Possession of a Driver’s License (CVC 21235d)E-scooter riders must have a driver’s license or instruction permit. Additionally, e-scooter vendors in Long Beach require that riders must be 18 years of age to rent a shared scooter.

Riding on Streets Over 25 MPH (CVC 21235 b) No riding on streets with a speed limit in excess of 25 MPH unless ridden in a bicycle lane.

Double-Riding (CVC 21235 e) Operate a motorized scooter with any passengers in addition to the operator.

Hand Placement (CVC 21235 f) Ride with at least one hand on the handlebars at all times.

Sidewalk Riding (CVC 21235 g) No riding on the sidewalk unless to leave adjacent property.

Hand Placement (CVC 21235 h) E-scooter cannot have handlebars above the shoulder.

Equipment Brakes (CVC 21235 a) No riding equipment without brakes.

Parking on Sidewalk (CVC 21235 i) Do not leave a motorized scooter lying on any sidewalk unless there is an adequate path for pedestrian travel.

Hitching Rides (CVC 21235 j) Attach the motorized scooter or rider while on the roadway to any other vehicle on the roadway.

Helmets (CVC 21235 c) E-scooter riders under 18 years of age must wear a bicycle helmet. The requirement for riders age 18 and over to wear helmet while riding was repealed effective January 1, 2019.

Long Beach Municipal Code

Riding on Private Property (LBMC 9.42.100)E-scooters cannot be ridden on private property.

Riding on Beach Path (LBMC 10.38.020) It is illegal to ride an e-scooter on any beach bike path or adjacent to the marina and sidewalks.


California Vehicle Code

Pedestrians Crossing at Intersections (CVC 21950) A driver shall yield the right-of-way to a pedestrian crossing at any marked crosswalk or unmarked crosswalk at an intersection. No pedestrian may suddenly leave a curb and walk or run into the path of a vehicle if it would create an immediate hazard. No pedestrian may unnecessarily stop or delay traffic while in a marked or unmarked crosswalk.

Pedestrians on Sidewalk (CVC 21952) When driving over or upon a sidewalk, a driver shall yield the right-of-way to a pedestrian.

Pedestrians Not in Crosswalk (CVC 21954) Outside of a marked or unmarked crosswalk, pedestrians shall yield the right-of-way to all vehicles upon the roadway.

Pedestrians Crossing near Signalized Intersections (CVC 21955 )Between adjacent signalized intersections, pedestrians shall only cross the roadway in a crosswalk.

Vehicles Blocking Crosswalk (CVC 21970) Drivers shall not block a marked or unmarked crosswalk or sidewalk.

Hailing Rides (CVC 21957) Pedestrians must hail rides while standing on the sidewalk, not in the roadway.

Pedestrians in Bikeway (CVC 21966) No pedestrian shall walk along a bikeway where there is an adjacent adequate pedestrian facility.

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411 W. Ocean BlvdLong Beach, CA 90802

Phone: (562) 570-6331

G-Bike CityElectric Scooter 48V dropping out

And it has the issue that it sometimes does not accelerate! As if it is hesitating. And when I turn the throttle a few times, it suddenly kicks in.

It has a controller which I could not find anything on (even tried Alibaba) Brush intelligent motor controller jdk 404R

The bike came with a spare mystery box and I was suprised to see it next to the controller (small silver box above controller)

Could it be the throttle making the problems?

The batteries are totally OK, all same level and have much power.

Could it be a short or a broken connection somewhere?

Has anybody a schematic from these bikes? I checked the Controller Information Links but could not find anything on 48V 750W, but I guess they are all very similar, right?

I am totally new to these exiting scooter ebike things, but do know some electronics.

Also, I am totally blown away by some of the mods/posts on these pages, amazing!

Any help/info is very much appreciated,


And it has the issue that it sometimes does not accelerate! As if it is hesitating. And when I turn the throttle a few times, it suddenly kicks in.

Could be batteries or a connection somewhere, in throttle or in wiring. If throttle is resistive rather than hall, could be a bad pot or have dirt in it.

It has a controller which I could not find anything on (even tried Alibaba) Brush intelligent motor controller jdk 404R

Typical brushed motor controller, probably.

The bike came with a spare mystery box and I was suprised to see it next to the controller (small silver box above controller)

g-bike, city, electric, scooter

Probably DC-DC converter for your lights and stuff, possibly a control box for turn signals/etc, maybe other stuff. You’d have to trace the wires.

What voltage are they at the moment you try the throttle, each time, both when it does not work and when it finally does?

The idea is to see what htey are under load.

If you found this advice helpful, supporting contributions are accepted here.


100 W

Could be batteries or a connection somewhere, in throttle or in wiring. If throttle is resistive rather than hall, could be a bad pot or have dirt in it.

I checked all battery connections, also under a 17A load, it’s fine. Yes, I remember scratchy potentiometers, maybe it’s just that?

I see, do those have 120 degree phases, too?

Probably DC-DC converter for your lights and stuff, possibly a control box for turn signals/etc, maybe other stuff. You’d have to trace the wires.

The wiring is a mess, no schematic on the bike, it has no manual and that G-Bike company is a bunch of criminals. I opened the spare mystery box, please see attached. Considering high tolerance resistors, and the 48V label outside, could it be the charging unit?

What voltage are they at the moment you try the throttle, each time, both when it does not work and when it finally does?

13,3 V and around 12V under load.

Yes, that was the first thing I checked, but as mentioned that is all OK. I checked the connections between the batteries, from the battery compartement to/after the fuse etc.

The weird thing is that when it drives, it drives OK, even under high load (uphill). I had one time when I throtteled down briefly and when I tried to accelerate again, it hesitated. But that happend once, while from standstill it happens much more often.


No, brushed motors don’t (usually) have any position sensors. If the motor has only two main wires from it it’s probably brushed, but if it has at least three main larger wires and at least 5 smaller wires, it’s brushless. Could be either on this type of scooter.

Since the label (which I didnt’ see in the first viewing of your thread but do now) says “brush” but also says that about the sensors, the label is definitely a mishmash of conflicting information, at least for those two things (possibly others). That is also typical of this kind of stuff, unfortunatelythat’s why I recommend you manually trace out the wiring because any schematic you might find on it is probably wrong.

I opened the spare mystery box, please see attached. Considering high tolerance resistors, and the 48V label outside, could it be the charging unit?

You’d have to trace out the wiring. Probably is DC-DC for lights and stuff, like I said. Until you trace it out or measure voltages or both, you won’t know.

I checked the connections between the batteries, from the battery compartement to/after the fuse etc.

Often it’s nto just whether something is plugged in, but also whether it is crimped or soldered properly, and also whether any wires might be broken inside the insulation.

Last week I fixed a friend’s Kawasaki motorcycle that had had intermittent problems with electrical stuff every time he made a right turn. This was because the idiot at the shop he’d last taken it to for a speedo cable fix had tied down the wiring harnesses very tightly to fixed points on the frame, not to the places they originally went to, and with no loops for flex as the handlebars have to turn. So it ripped the conductors open inside the insulation on two of the wires to the keyswitch, which I had to splice to fix the problem.

I can’t even list all the times I’ve fixed stuff that was intermittent from poor crimps or nonexistent solder on contacts, where the actual pins made perfect contact but the wire was just sitting in the back of the connector pin.

If you found this advice helpful, supporting contributions are accepted here.


100 W

On http://www.shopgbike.com/products/city/indigo.html under ‘Tech Specs’ it says 750Watt Brushless Hub Motor, but that’s for the newer models. Mine is 2 years old and maybe brushed as you suggested.

Will check the motor wiring and measure the mystery box tomorrow, good ideas you had.

Yes, those crimping issues are really bad. But worse are the unleaded wires/cables they use here in the US (and China).

Nerarly all cables I encounter here, be it in my car or other equipment have plain copper (or copper clad aluminum) wires in them.

And with this bike, they use copper contacts/wires on silver plated terminals, which is an invitation for disaster, corrosionwise. Many were corrorded green already, washed it all off first thing.

Anyhow, back to the initial question, of why this bike sometimes does not start, I will try to check the thorttle tomorrow, in a weird way, I hope to find it broken.

Could it be a bad switch from the brake? Looking at some schematics, there is a brake switch (for the brake lights), but it also goes into the controller and probably disables the power output to the motor.

Wish I had some sord of schematic to go on.

dogman dan

1 PW

Not so likely to be the brake switch. It has to close a circuit to engage the controller shut off function. likely an intermittent bad contact in the throttle wiring, or the wiring to the motor itself.

If brushed, it could also be a sign that the brushes are wearing out. Brushed motor will have only two big power wires into the hub in most cases. Brushless has three big wires, and possibly 5 smaller ones.

Frankenbike longtail http://endless-sphere.com/forums/viewtopic.php?f=6t=28389hilit=bouncingbetty.


100 W

I have never seen such a balant disregard for prevention of galvanic corrosion!

As if they deliberatedly try to fault the machine.

Nearly every single connector beneath the controller had different anodic indices, be it gold plated to copper, silver plated to copper, or grey stuff (probably an alloy) to gold plated. And even copper to iron (fasteners)!

No wonder these things don’t last long!

Green, yellow, brown, you name it, any oxidation from the chemistry books was there.

And not a single (tin) plated copper wire, all pure copper.

Add to that the salt and humidity present in SoCal, and yes, youv’e got a time bomb.

And these people charged over 1200 for this!

g-bike, city, electric, scooter

After seeing this I took apart all connectors and cleaned the pins. As mentioned, some connectors were burried beneath the controller. Had to remove it of course.

Used dielectric grease an glue to to seal it off.

At least it does work now!

Thanks all for your suggestions/help.


100 W

The mystery box was indeed a 48V to 12V converter!

Do the control boxes (in general) manage the charging of the batteries or is it done just by the charger itself?


100 W

Hi all, just an update, I found the charger for it and it has been a great experience this e-bike riding!

In comparison to a real motorcycle, this is a quiet and slow ride, and you have much more time to take in the enviroment around you.

I found shops and places I passed often and didn’t know they existed.


1 mW

Hi All, sorry to bump this thread from the dead but I’m in EXACTLY the same position as the OP; I just got a used G-bike City from a friend and it’s in need of some love.

it has exactly the same problem as you described powersupply. sometimes you turn the throttle and it does nothing and only jumps in to life after the 4th or 5th twist, and again, it fine once you’re in motion, but again, say stop at a set of lights, damn thing won’t move.

Did you just solve it by cleaning all of the contacts? I was considering cleaning all of them, then using Deoxit Gold. Please let me know if that was the fix.

Also, I have an issue with the key.

I don’t have one. The friend gave it to me as they were getting rid of their storage unit and they told me the key should be in the ignition. I drive all the way there and no key and they have no idea where it is. I called a few local locksmiths but the general consensus is don’t hold out much hope. Apparently with the chinese electric scooters, it’s complete pot luck as to whether you can key something for it and most of them have quoted 200 with no guarantees.

Finally, I know it was in storage for at least a year and the battery is going to be at least 3 years old. I was told by a guy that used to sell them that he would upgrade them to L-ion but he let his contacts slip and has no idea of a good source.

All I know is it seems to be 48v in a 4 x 12v config and the extended battery is apparently 22ah.

Again, any help great appreciated.

G-FORCE ZF eBike Review – A Stylish Moped Style Electric Bicycle

The G-FORCE ZF is a full-suspension step-through eBike with a long saddle, alloy rims, and a headlight that gives it a moped/scooter appearance. The ZF is essentially a moped in electric bike form. Equipped with a large battery you will be able to enjoy smiles for miles on the ZF.

In this review, I will tell you what I love and hate about the G-FORCE ZF.

Click here to see the current pricing on the G-FORCE ZF.Save 100 with coupon code: FreshlyCharged

The G-FORCE ZF Rims Look Amazing!

The G-FORCE ZF features Bafang alloy rims.

G-FORCE eBikes are the only bikes Jimmy and I have reviewed without the traditional bicycle spoke design. The alloy rims really make this ebike standout and add an aesthetically pleasing look that reminds me of a motorcycle.

The rims look sweet but they do add some extra weight to the bike.

What type of brakes are on the G-FORCE ZF?

The ZF features Ronglun two-piston hydraulic brakes paired with 160mm brake discs.

We have never seen the Ronglun brakes used before on any ebike or escooter besides the G-FORCE ZM. However, the levers look similar to the Zoom hydraulic brakes. For being off-brand brakes, they have great stopping power.

I wish G-FORCE would have used 180mm brake discs to increase stopping power because the rims have plenty of room to fit them.

How bright is the light on the G-FORCE ZF?

G-FORCE does not mention the number of lumens on the ZF headlight. However, we found it to be brighter than most eBikes we have reviewed in the past.

On top of it being bright, the headlight has a unique design that we have never seen before besides the G-FORCE ZM. The headlight features LEDs around the edge and in the center, with a metal cage over the top.

The headlight is mounted well and does not shift when riding or hitting bumps.

What type of display is on the G-FORCE ZF?

The G-FORCE ZM features a large color display which I prefer over grayscale displays.

I would like all eBikes to come with color displays. It’s 2022 and I’m still wondering why eBikes come with displays that look like large Casio watches. I like the display on the G-FORCE ZF, but it has its drawbacks that I will mention later.

How big is the battery on the G-FORCE ZF?

The ZF comes in two battery sizes, 13.5Ah and 20Ah.

g-bike, city, electric, scooter

The 20Ah version costs only 100 more than the 13.5Ah version, so I would just spend the extra money for a battery that is almost 1.5 times larger. I like that the ZF comes with a 20Ah version because most ebikes have batteries that are 15Ah or less.

How long does the G-FORCE ZF take to charge?

The 20Ah and 13.5Ah G-FORCE ZF should take just under 7 hours to charge from empty to full.

The 20Ah version comes with a 3 amp charger and the 13.5Ah version comes with a 2 amp charger.

Soft and comfy seat on the G-FORCE ZF

The large saddle on the G-FORCE ZF has a lot of padding making it extra comfortable for long rides.

The comfy seat paired with full suspension makes the ZF an enjoyable ride over bumpy and imperfect terrain.

Click here to see the current pricing on the G-FORCE ZF.Save 100 with coupon code: FreshlyCharged

How do you turn off cruise control on the G-FORCE ZF?

I have yet to find out how to turn off cruise control on the ZF.

I have adjusted the P16 setting to turn off cruise control on the ZF, but it will still engage when riding. You can always hit the brakes to turn off the cruise control but I find it obnoxious that I can’t turn it off.

What type of derailleur is on the G-FORCE ZF?

The ZF features a Shimano Tourney Derailleur which is the lowest end of derailleur that Shimano offers. I would have liked them to spend a little bit more to put a Shimano Altus or Acera derailleur on the bike.

What type of fenders is on the G-FORCE ZF?

The ZF comes with plastic fenders. I would have preferred metal fenders to go with the overall look of the G-FORCE ZF.

However, I am happy that it comes stock with fenders. Some companies like Aventon will charge you to add fenders to your bikes which can become costly.

Does the G-FORCE ZF ride like a traditional bike when in PAS 0?

The G-FORCE ZF is heavy and you can’t adjust the seat height to make it feel like a traditional bike.

The ZF rides more like a moped. Jimmy and I prefer to ride the bike using purely throttle only most of the time.

Color display with limitations

I wish the display on the ZF would show exactly what I’m adjusting instead of having P-settings.

Most ebikes with color displays have intuitive controls where I can read what I am changing. On the ZF, you need to carry around a manual or a digital copy of the manual so you know what P-settings to adjust.

Major throttle delay on the ZF

When you twist the throttle on the ZF, there is a major delay in the throttle. It takes a second for it to engage and it is a little sluggish.

Once the ZF gets moving, it picks up speed well but I wish it had better bottom end torque.

Final Thoughts

If you are looking for a comfortable ebike that is more moped than bike, you will want to check out the ZF.

The ZF is perfect for long comfy rides with its large battery, comfy seat, and plush suspension.

With its unique moped look and alloy rims, you’ll stand out riding the ZF on your daily commute.

G-FORCE ZF Discount Codes, Coupon Codes, and Pricing

Click here to see the current pricing on the G-FORCE ZF.Save 100 with coupon code: FreshlyCharged

Click here to view all our coupons and discounts on scooters and other PEVs.

Click here to view all the safety gear that Jimmy and I use.

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Interested in electric scooters, check out our gotscooter blog.

Click here to check out all our coupon codes for other PEVs.

KUGOO G-MAX Electric Scooter. 500w

Strong grip, wear-resisting, and safe. It’s suitable for different kinds of roads.

500w Motor On In Front Wheel

500W strong driving force, up to 35km/h.

Rear disc brake, it’s much safer for people to ride.

3 Speed Modes

You control the speed according to the different road surface conditions, which makes driving more comfortable and riding more security.

New Generation Folding System

G-max has applied with a new generation folding system, much stronger than others on the market.

FCC CE Certification

Pass FCC and CE verification

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Refund Policy

AFTER SALES SERVICE AGREEMENTIn accordance with the principles of equality and mutual benefit, sincere cooperation and common development, in order to better serve clients, after friendly consultations, in accordance with the principles of mutual trust and sincere cooperation, an agreement is reached and both parties abide by it.

All cost covered by buyer themselves if returned without quality issue and the returned goods shall not affect the normal secondary sales. The product shall be intact and complete, including complete packaging and no damage to the appearance within 7 days. If the returned merchandise affects the normal secondary sales, the buyer will deal with it by themselves.

Once you received the product and find quality issue, please feedback to our company within 7 days, and the full amount will be refunded after our company receives and confirms it. If more than 7 days, we will deal with it as normal quality issue. The time is calculated based on the actual logistics information delivery as 7 working days.

a). Within 7 days after the logistics information is delivered, due to product quality issue, the full amount will be refunded after our company received the confirmation, and we stand for all shipping cost also.b). than 7 days, within 1 year warranty period (battery warranty period is 6 months) due to product quality problems, our company provides free accessories and free maintenance, Buyer stand for shipping fee.c). Over 1 year warranty period, our company provides lifetime paid maintenance service, The buyer pay the all cost includes parts cost and shipping cost.

If the issue caused by non-quality problems, even within the warranty period, our company is only responsible for providing after-sales service, but does not bear any related costs.Such as:a). If it is used in the rain for a long time or immersed in water, the battery will be damaged due to various ingresses, the instrument will be damaged, and the connection cable connector will be damaged.b). Issue caused by weight overload driving, long-time climbing or long-distance driving on bumpy roads, etc.c). If the users does not strictly use, maintain and maintain the instructions in the user manual.d). If the users does not authorize our company to modify, add or modify the appearance and function of the product without permission caused issue.e). Issue caused by accidental damage caused by user storage or use in an incorrect environment.f). If the invoice, warranty card, model and serial number do not match or change.g). If the local laws and regulations are not followed, various accidents, etc. do not meet the warranty terms

The specific return process needs to be handled according to the RMA return logistics method specified by our company; if the customer uses other logistics methods for processing, our company does not assume any responsibility and related costs.

The final interpretation of this clause belongs to our company. If there is any dispute within the validity period of the contract, the two parties negotiate to resolve it, and the agreement can be supplemented.

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