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RMB EV flex 500 Owner's Manual
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RMB EV flex 500 Owner's Manual

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Carolyn Ingold
July 20, 2025

We have an older RMB EV flex 500. When we try to drive it. It acts like it has a lose connection. It will go fine for a short distance and kind of growl. We think it is a lose connection, but don't know how to get inside the wheel. Is there a detailed diagram that would tell us how to take it apart to check the wiring. When we turn the throttle it gives real jerky motions and groans. lol It use to come out of it, if we tapped the middle of the front wheel, it would start working again. Can you please let me know either way if you can help us. We use them all the time when we go camping. Thanks

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Summary of Contents for RMB EV flex 500

  • Page 2: Table Of Contents

    Technical Information----------- ----------------------1 Warning Statement--------------------------------------2 Read Before Riding-------------------------------------3 List Of Parts-----------------------------------------------4 Front Bar---------------------------------------------------6 Tool Kits In The Tool Bag------------------------------7 Assembling The Flex 500------------------------------8 Charging The Batteries-------------------------------12 Riding The Flex 500-----------------------------------13 Folding The Flex 500----------------------------------16 Maintenance---------------------------------------------18 Wiring Diagram-----------------------------------------19 Trouble Shooting Guide------------------------------21...
  • Page 3 Information Information Flex Flex Flex Flex 500 Model No. RMB Flex 500 40 L x 27 W x 38 H inch (102 Product size L x 68 W x 98 H cm) Permanent-magnet Type of motor brushless DC wheel motor...

  • Page 4: Warning Statement

    Warning Warning Statement Statement Warning Warning Warning Statement Statement Statement Warning Statement Warning Warning Statement Statement Flex Flex Flex Flex 500...
  • Page 5 Riding Flex Flex Flex Flex 500 WARNING WARNING WARNING WARNING THE RMB FLEX 500 IS NOT A TOY AND SHOULD NOT BE OPERATED BY ANYONE UNDER 12 YEARS OLD. Safety Instructions: Safety Safety Safety Instructions: Instructions: Instructions: ( Please take note of the following before each ride) •...

  • Page 6: List Of Parts

    List List Parts Parts List List List Parts Parts Parts List Parts List List Parts Parts Flex Flex Flex Flex 500...
  • Page 7 Flex Flex Flex Flex 500 Throttle Multi-function Instrument Brake lever Alloy handlebar tub Quick release Connecting tube Seat Battery & controller compartment Balancing wheel Footboard Rear wheel Power connecting plugs Allen set screw Front fender Front fork Motor Front wheel...

  • Page 8: Front Bar

    Front Front Front Front Front Front Front Front Flex Flex Flex Flex 500 1 Brake lever 2 Horn switch 3 Multi-function Instrument 4 Key switch 5 Throttle...
  • Page 9 Tool Kits Tool Tool Tool Kits Kits Tool Tool Flex Flex Flex Flex 500 Screwdriver Allen wrench （2.5mm） Allen wrench （3mm） Allen wrench （5mm） Allen wrench （6mm） Wrench (8 x 10mm) Wrench (16 x 18mm) Wrench (16 x 18mm) charger...
  • Page 10 Flex Flex Flex 500 1. Unpack the Flex 500 carefully so that you do not misplace any of the parts. 2. Place the Flex 500 on a flat, level surface. Block the front up 3.5''. This will make the next step easier 3.
  • Page 11 Flex Flex Flex Flex Flex 500 4. The two Allen set screws on the front of the connecting clamp are for removing any play after the bolts have been tightened. First, back off the nuts, second, set the screws, third, tighten the nuts to prevent the screws from backing off.
  • Page 12 Flex Flex Flex Flex Flex Flex 500 6. Ensure that the handlebar is facing front, the brake on the left side and the throttle on the right, then tighten the handlebar tube collar clamp using the enclosed 5mm wrench. 7. Plug in the two power connecting plugs into the sockets.
  • Page 13 Assembling Assembling Flex Flex Flex Flex Flex Flex 500 NOTE NOTE NOTE NOTE: Handle bar height adjustment. Handle bar height can be easily adjusted by opening the quick release on the handlebar tube to preferred height, then firmly closing quick release.
  • Page 14 Batteries Batteries Flex Flex Flex Flex 500 Before you ride the Flex 500 for the first time ● you must charge the batteries for 4-6 hours using only the supplied charger. To charge the batteries, plug the charger into ●...
  • Page 15 Once you have completed the initial charge you ● are ready to ride. Remember, this is not a toy. The Flex 500 can reach speeds up to 15 mph depending on the terrain and the weight of the rider. You must wear a helmet and protective pads.
  • Page 16 NOTE 4: 4: 4: 4: Depending on skills of the driver, the NOTE Flex 500 comes equipped with an adjustable speed switch located at the back of the scooter by the charge port which allows you to limit speed to...
  • Page 17 Flex Flex Flex Flex 500...
  • Page 18 Flex Flex Flex Folding Flex Folding Folding Flex Flex Flex Flex Flex Flex 500 1. Turn off the key switch 2. Press the quick release to bottom. 3. Lift the clip bar, at the same time pull the handlebar tube.
  • Page 19 Folding Folding Folding Flex Flex Flex Folding Flex Folding Folding Flex Flex Flex Flex Flex Flex 500 4. Lift the connecting tube (which is also attached to the handlebar tube). 5. Carefully place the handlebar tube on the footrest frame...

  • Page 20: Maintenance

    To prolong battery life, recharge the battery after each use. You must also charge your Flex 500 if it has not been used for 30 days or more. If you need to replace the battery pack, it is located inside the battery compartment on the footboard.

  • Page 21: Wiring Diagram

    Wiring Wiring Diagram Diagram Wiring Wiring Wiring Diagram Diagram Diagram Wiring Diagram Wiring Wiring Diagram Diagram Flex Flex Flex Flex 500...
  • Page 22 Wiring Wiring Diagram Diagram Wiring Wiring Diagram Diagram Wiring Wiring Diagram Diagram Wiring Wiring Diagram Diagram Flex Flex Flex Flex 500 Multi-function Left handlebar Instrument Throttle Brake lever Motor Battery Charger Controller...
  • Page 23 2. Loose 2. Remove the does not connection screws that hold the illuminate when inside Flex 500. battery compartment the Flex 500 is 3. Fuse is blown. cover and raise the 4. The cover. Visually instrument is inspect all wire defective.
  • Page 24 1. Adjust the brake by lever is are not adjusted loosening the bolt on squeezed the properly. the rear brake wheel, Flex 500 does pull the cable and not stop. retighten the bolt. Scooter is 1. Low battery 1. Recharge your losing speed.

  • Page 25: Warranty

    RMB EV warrants the Flex 500 for six (6) months according to the following terms. Batteries and tires are warranted for three (3) months.
  • Page 26 An authorized RMB EV service dealer must perform all warranty work. The warranty is limited to thirty (30) days from the date of purchase for any RMB EV product that is used for rental demonstration, commercial purposes, or any other income producing purpose.
  • Page 27 RMB EV products. In addition this warranty does not cover items that experience normal wear and tear. RMB EV reserves the right to improve the design of the product without assuming any obligations to modify any product previously manufactured.
  • Page 28 RMB EV assumes no responsibility for incidental consequential or other damages including but not limited to expense of returning the Flex 500 to an authorized service dealer and expense of delivering it back to the owner, mechanics travel time, telephone...
  • Page 29 SERVICE: HOW TO TO GET GET WARRANTY WARRANTY SERVICE: SERVICE: To obtain warranty service, please call or fax to the following telephone numbers for RMB EV Customer Service - warranty repair Tel. 1-707-568-3333 or Fax.1-707-526-1409, Email: info@rmbev.com RETURN RETURN YOUR...