Razor Cycling - Popular Questions, Answers, Tips & Manuals

Question edited for a lot more clarity. Question moved from 'Power Computers' to model category. Did you just remove the lead acid AGM batteries and replace with Lithium Ion? There is a lot more to it that that, you have to replace the controller as well and for safety you need a LiFePO battery and a new twistgrip because the old one is little more than an On / Off switch.. Motor Controller Kit 24v LiFePO4 Battery Lights and Horn Kit https://www.ebay.com/itm/222627137235

Here is the link. Watch it.

Question edited for clarity. There are some ideas here. If they don't work, contact Razor Support. https://www.google.com/search?q=mx+500+razor+solenoid ..

are the chain and sprockets worn out?

SHOULD BE A RETURN SPRING ON IT

Thoughts - No/poor connection between power source and motor Motor failure Only someone with their hands on the bike can fully diagnose.

I suggest you call a razor customer service person.

Hi, You'll need to remove the keyswitch itself & either take it to a locksmith to have a replacement cut from the barrel or replace the entire keyswitch with a compatible replacement unit.!

it is a old charger ?

I think you are talking about an electric motor on your bike . If the motor is New you may have a bad throttle switch . You can use an ohm meter to check the throttle switch . Connect the two leads of the ohm meter to the wires of the throttle switch ( dissconected) . As you turn the throttle the ohm reading should coraspond to how much you turn it .

BEST SOLUTION GO TO A GOODWILL MOST OF THE TIME THEY HAVE- BIKES FROM $10.00 TO $40.00 AND YOU LOOK FOR A BIKE THAT HAS A GOOD BACK WHEEL AND YOU'LL HAVE EXTRA PARTS HERE IS A LIST OF PLACES GOODWILL&THRIFT STORE& SWOPMEET THAT HOW I FIX MY BIKES.. HAPPY HUNTING. D,R,CLAUDIO

Either the cheap lead acid batteries are near dead (mostly due to improper maintainance (lead batteries are way too much trouble and lithium should be considered!) There could be a loose or corroded connection - check on all your wiring, especially the ones to the motor. Also where it goes into the motor is fragile and people bump that area and it rips the wire, there is a steel spring that surroiunds the wire/s and this sometimes shorts out because of the damaged cause from laying the bike on it's side. check these wires over and tug on the connector wires to find the weak connection. Also verify that your charger turns red indicating it is charging when attempting to charge the bike, if it stays green chances are a dead battery or BMS controller inside battery (Lithium only!)\ Most repairs are very simple if you take the time to check out the connectors and wiring, especially if you use it in bad weather, things get corroded from being wet and power shorts out then corrodes the wires and connectors. Good to insulate them for the rain etc... Think Im on the right track here, and i have many ebike because people dont know how to fix simple issues with a tester.

DOES THE BIKE HAVE A FUSE CONNECTION BEFORE THE CONTROLLER? IF IT DOES THEN I WOULD LOOK FOR THE FUSE LINE AND IF IT DON'T THEN I AGREE WITH YOU'R ASSUMPTION.IF AND WHEN YOU DECIDE TO FIX IT,I WOULD CONSIDER A FUSE I'LL BE LESS $$$. D,R,CLAUDIO

this is a little complicated. 1-check fuel line and filter make sure you have a good gas flow. 2-check you'r hose's for leaks 3- OPTIONAL -check you'r engine for compression.you can buy a pressure gauge at auto zone buy the one that screws into the piston hole it makes it easy for you. REMINDER!! IF CHECKING THE FUEL LINE AND IF IT RUNS BETTER OR BY CHECKING THE HOSE'S AND IF IT RUNS BETTER (THEN YOU WON'T HAVE TO CHECK ENGINE CHECKUP THIS OPTIONAL.) SAFETY FIRST GOOD LUCK. D,R,CLAUDIO

The off and on switch lights up but will not start.

http://www.scootercatalog.com/ottrshti.html
This site has everything to check if scooter is not running regarding fuse problems. If you need further help, reach me via phone at https://www.6ya.com/expert/kelley_9a924afdf232bd4d

Hi Christopher: - Let me first tell you that I am 72 years old. I currently own an 1100 cruiser and a KLR 650. Yesterday we rode a total of 360 KM of mountain gravel and paved highway, from sea level to 3500 ft mountains and snow. - I've owned motorcycles since I was 13 years old. - I've told you all of this so that you know that my response to your question comes from experience, and a lot of it. - Motorcycles, especially dirt bikes, are intended to be ridden in technical (translate that as less than pristine) environments. Sticks, mud, rock, hills, water crossings, you name it, All are part of the enjoyment of having these machines. - Motorcycles are machines. They have a bunch of moving parts that eventually are subject to wear and breakage. - That means that they require REGULAR maintenance, and that means a LOT more than your mom's daily driver car. - If your chain and sprockets are in poor condition or if the chain was slack, it could easily have come off without a stick being involved. - BOTTOM LINE: - If you are concerned that someone else might damage your ride, NEVER let anyone else use it. - If you let other people use your ride, be prepared to HAPPILY learn how to repair any damage, with or without their physical or financial help. IT'S YOUR TOY, AND YOUR RESPONSIBILITY. ENJOY!

Too many possibilities. Do a google search for "Razor mx 350 repair" or "repair electric bike" I’m happy to help further over the phone at https://www.6ya.com/expert/donald_f2ed37026a3ac881

Try connecting the red wire to the + battery post and the black to the - post.

Most likely, the last 2 answers are correct. When you charge the battery, does the light on the charger stay red for several hours before turning green? Check the voltage of the 3 batteries after the charger light turns green. It should be 39-40 volts or so no load. Turn the throttle and see if the voltage drops when the relay clicks. You can connect the batteries directly to the motor and it should go full speed if they are good.