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Scroll Down for Answers to the Following Common Problems
My Scooter Won't Start
My Scooter is Not Charging
My Scooter is Hard to Start
My Scooter Bogs out When I Turn the Throttle
My Electric Start Won't Work
How Do I Adjust My Brakes?
My Scooter is Not Holding Its Charge
My Scooter Has Problem When Running at High Speed
The following information is provided for your mechanic or authorized dealer to assemble your scooter:
To start a scooter needs three things:
Gas
A spark
Cylinder compression
If your scooter won't start it due to one of the above not being present. Before you start troubleshooting, make sure there is gas in the tank by actually looking into it. Don't just trust the gas gauge!
Most scooters have four things that need to be done before they can be started with the electric starter:
The ignition has to be turned on
The kill switch (usually near the right grip) has to be in the "on" position
The rear (left) brake lever has to be squeezed.
The starter button must be pressed
Some scooters may have other interlocks on the front brake or the center stand. Check your owner's manual to make sure that you are doing all you need to complete the electrical circuit, which enables it to start.
If the scooter doesn't turn over when you've done all the required operations, there's an electrical problem with the battery. Make sure the battery is charged.
If it is, make sure the fuse hasn't blown.
If it hasn't, check to see if you are getting voltage to the starter motor terminals.
If you are, the starter motor is likely defective.
Many scooters have a kick start (see your manual). If the battery is OK and the starter motor doesn't work, try kick starting it. It's usually not too hard.
If the scooter does turn over but still doesn't start you have to check for a spark and make sure gas is getting to the engine.
To check for a spark, remove the spark plug from the cylinder, hold the tip of the plug against the cylinder head and crank the engine. You should see a spark across the gap. Be careful not to get shocked.
If you don't, there's a problem with the ignition. Could be a faulty coil or electronic ignition module which will have to be replaced, or it could just be a lose wire or a bad spark plug.
If you do have a spark, you need to check the gas. Make sure there is gas in the tank first!
If there is you need to check the fuel valve. Most scooters use a gravity fuel feed by locating the fuel tank higher than the carburetor. The fuel usually then flows through filter and then through a vacuum operated valve. The valve has three hoses connected to it. One if from the fuel tank and is for the gas going in, one is connected to the carburetor and is for the gas coming out and one goes to the engine manifold which provides a vacuum. If you disconnect the hose from the carburetor, fuel should run out when you crank the engine (be careful to catch the gas if you do this and don't do it with a hot engine). If you don't see gas the fuel valve may be faulty. You can try applying a vacuum to the control port of the valve and see if the fuel flows. Sucking on the line is one way to do this (but make sure it's the vacuum line, not the gas line if you try this!).
If you are getting a spark and you are getting gas to the carburetor and the engine is turning over on the starter OK, it's possible that the electrically operated automatic choke has failed. It's supposed to operate when the engine is cold, but if it's stuck or burned out, the mixture will be weak and the scooter probably won't start. The automatic choke is usually a black cylindrical object attached to the carburetor with a couple of wires coming out of it as shown on the left. It's the only electrical powered component attached to the carburetor, so it's usually not hard to spot. If you have a voltmeter you can measure the resistance across the leads of the choke. It should be somewhere in the region of around 10 or 20 ohms. If it's an open circuit, it's burned out and will need to be replaced. If it seems to be OK it may be stuck, or the wiring to it may have a problem. Check to see that it's getting voltage.
It's also possible that there is a problem with the carburetor and if so you may need to remove it and clean it out. If the scooter has been sitting for a few months with gas in the carburetor, the gas may have evaporated and left a sticky "gum" behind that will prevent the carburetor from working properly and must be removed. Remove carburetor from scooter turn upside down, remove float bowl cover, and remove jets, clean jets and reassemble. This usually solves the problem with a dirty carburetor.
If the automatic choke is OK, the starter cranks the engine, there's gas and there's a spark then there may be an engine problem. You need to check the cylinder compression. You need a compression tester to do this. It screws in instead of the spark plug and measures cylinder pressure. When you crank the engine you should see a reading of around 150 psi or more. If it's 100 psi or less there's likely and engine problem (bad valve, need valve adjustment, bad piston, failed piston rings) which will need the engine taken apart to find the problem.
Probably the most common problems are a dead battery or carburetor problems due to bad adjustment or build up of gummy deposits. Carburetor problems usually come on slowly though.
The following information is provided for your mechanic or authorized dealer to assemble your scooter:
Make sure the fuse in scooter is good. The main fuse is generally located in the battery compartment.
The following information is provided for your mechanic or authorized dealer to assemble your scooter:
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 causing a leak. Solution: replace new gasket or just toss the bad gasket away and screw carburetor back. Try to start again.
The following information is provided for your mechanic or authorized dealer to assemble your scooter:
Adjust the screw with the spring on the side of the carburetor. Clockwise to reduce gas flow and counter clockwise to allow more gas flow. Too much gas going thru the carburetor usually causes scooter to bog down.
Give time for it to warm up.
If that does not solve the problem, you may need a carburetor cleaning or a new carburetor.
The following information is provided for your mechanic or authorized dealer to assemble your scooter:
Make sure to squeeze the left brake handle while pressing the electric button.
Sometimes right brake handle will work also.
Check the fuse.
When the electric starter makes a clicking noise, it probably means your battery is weak.
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.
The following information is provided for your mechanic or authorized dealer to assemble your scooter:
Cable operated brakes can be adjusted at the wheel or at the brake handle.
Hydraulic brakes may need to be bled.
The following information is provided for your mechanic or authorized dealer to assemble your scooter:
Using the electric start too much will drain the battery.
Gas scooters do have the ability to charge the battery itself but slowly. An optional charger can be purchased for around $25 at any local automotive stores.
Most new scooters would have a full charge. But in time, the batteries would lose their ability to hold a full charge. That's normal!
Sometimes charging the batteries too much can be bad for the battery. Most of these batteries charging cycle are around 250-300 times.
Sometimes storing your scooter away for a long period would cause that as well. If the battery power drops beyond a certain point, the charger would not recognize it. Sometimes you could jump start the batteries by using a higher Amp charger. Do this at your own risk.
The following information is provided for your mechanic or authorized dealer to assemble your scooter:
If the scooter idles well and runs fine at low speed, but has problems at high speed, the problem may lie inside the carburetor with the main jet. The jets inside the carburetor set the fuel/air ratio at higher speeds and to get at them the carburetor has to be removed and disassembled. This can be a tricky job as the parts are small and delicate. The good news is that these carburetors are quite cheap. You can get a new one for $60-$80, so if you can't make your scooter run smoothly and you don't like the idea of taking the carburetor apart, you can always replace it!
Sometime this can happen when the valves are out of adjustment. The fuel valve opens and closes using vacuum it gets from the engine. If the valves are out of adjustment you are not getting the right amount of vacuum to open the fuel pump to give the carburetor fuel. It will feel like it is running out of gas.
Valve lash (gap) is typically set at .002
If this information did not help you email tech@buylowpricescooters.com or 1-888-338-9960
