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Troubleshooting Tips for Moped Scooters

Scooter Trouble-Shooting Guide

My scooter is not charging

  • Make sure the fuse in scooter is good.
  • Check the wires behind the fuse holder and the charging jack. Sometimes they come loose.

My scooter will not start

  • Make sure you have fuel getting to the carburetor.
  • Check the spark plug for sign of wear and tear.
  • Try using starting fluid to aid the starting process, spray a little into the carburetor.
  • If it starts by spraying starting fluid and dies as soon it runs out of starting fluid then this means there is no fuel getting to the engine. Check the carburetor.
  • Or there might be vaccum leak in the piston area. If your piston is badly scratched up due to the lack of oil, then you need to replace piston and rings to compression back.

My scooter is hard to start

  • Is the spark plug dirty? Clean or replace it if it's dirty.
  • Make sure the carburetor and the intake manifold are tightly secured to the engine.
  • Check the gasket between the carburetor and intake manifold. Sometimes the gasket is bad and caused leak. Solution: replace new gasket or just toss the bad gasket away and screw carburetor back. Try to start again.

Scooter bogs down when I turn the throttle

  • Adjust the screw with the spring on the side of the carburetor. Clockwise to reduce gas flow and counterclockwise to allow more gas flow. Bogging down is usually caused by too much gas going thru the carburetor.
  • Give it time to warm up.
  • If none of the above works, you might need a new carburetor.

My scooter is leaking oil from the carburetor and muffler areas

  • Check the gasket between the carburetor and intake manifold. It might be bad or maybe the carburetor came loose due to engine vibration.

Carburetor Adjustment

  • The small gold screw on the side of the carburetor is the idle speed. This screw controls the idle speed, the tip should extend about an 1/8 of an inch (4 mm). Adjust it so the engine will idle at just fast enough speed to stay running.
  • The brass color screw located lower on the side of the carburetor next to the choke lever is for the high speed mixture. Start by turning this screw in (clockwise) until it stops. Don't turn it in tight, just until it stops. Next, turn the screw out two full turns (counter-clockwise). This is the factory setting. You should be able to start and operate the scooter with this setting. Once you have it running, you can fine tune. Never turn the screw more than 1/8 of a turn at a time Try turning it IN about 1/8, this will help the top speed operation. BUT, turning it in TOO MUCH will cause the motor to run lean at full speed and can burn a piston. Also, running too lean will cause a loss of low end power. Once you get the mixture set you can adjust the idle, it should be low enough that the engine doesn't vibrate. Finally make sure you have the choke lever down completely after the scooter is started and warmed up.
  • There is also a main jet adjustment screw dead center on the top of the carburetor. This is most always set at 1 full turn out. If this is not adjusted correctly, your scooter may not run, or run very poorly. Once again, turn screw all the way in (clockwise) and then out (counter-clockwise) 360 degrees (1 full turn).

My electric start won't work

  • Make sure to squeeze the left handle brake while pressing the electric button.
  • When the electric start makes a clicking noise, it means your battery is weak.
  • Check the fuse.
  • Is your key switch good?
  • Is the electric start giving out a burnt smell? You might have a burnt out electric start. (Sometimes there is no smell but check anyway).

My engine froze

  • The cause is lack of oil getting to the piston and needle bearing areas. Certain oil can't cling on when the engine gets too hot. As a result, the needle bearing falls apart inside and causes the engine to seize. You can buy a new engine or try to rebuild it. Be sure to always maintain proper engine oil levels to help prevent this from happening.

How do I adjust my brakes?

  • Brakes can be tightened by the handbrake area by the handlebar or by the wheel area.

My scooter is not holding its charge

  • Using the headlight, electric start and alarm (if applicable) too much will drain the battery.
  • Gas scooter does have the ability to charge itself but slowly. An optional charger is usually $25 at any local automotive stores.
  • Most new scooters have a battery with near-100% charge capacity, but over time this capacity diminishes from wear and tear. This is normal, it's called battery life.
  • Overcharging the batteries (charging when at near-full power) can decrease battery life. Most of these batteries' charging cycles are around 250-300 times.
  • Not using your scooter for a long period of time can also decrease battery life.
  • If the battery's power drops beyond a certain point, the charger will not recognize it. Sometimes you can jump start the batteries by using a higher Amp charger.

ATTENTION RIDER!!!

Routine check ups

  • Make sure all loose parts are tightened before each ride (such as the neck of the handle bar, wheels, seat post, brakes, and ESPECIALLY the engine mount screws).
  • Make sure the tires are full, but not to bursting.

Not Recommended

  • Avoid jumping off curbs and ramps. This is not a video game.
  • Adding too much weight on a scooter can bend or break the frame.
  • DO NOT RIDE ON A FLAT TIRE. This is dangerous and may damage the wheel.