how to troubleshoot gas scooters can save you money.
We show you how, and
where to go for gas scooter tools
Shooting Reference for Gas Powered Scooters
page is provided to help you find and repair problems
associated with gasscooters and is not intended to replace your
repair manual. To successfully use this guide you will be
taught how to identify the major problem with your scooter, and
then use the guide to make the diagnosis and repair. I have
listed the most likely causes first to help you quickly get your
gas scooter back on the road. You may it beneficial
to read an excellent article on gas
scooter engines first. If you are looking to resolve a
gas scooter drive train issue, try Troubleshooting
gas scooter Drive Trains.
Maintenance, disassembly and repair of your gas powered scooter
should only be performed by people with sufficient mechanical
skill or experience so that no unsafe repair or modifications are
is by far the most common gas scooter problem you will experience.
Non-starting engines can result from improper winter storage (you did drain out
or use up all the fuel in tank at the end of the riding season didn't you?),
loss of ignition, or electrical problems. Here is the process I follow
when this happens.
check to see if the unit has gas, and is the gas clean with a well
maintained gas cap. If the gas cap gasket has deteriorated and bits of
it floating around in the tank, then the filter may be plugged.
you think the gas in the tank is stale (can happen in less than 60
days!). Old, stale gas smells like varnish and leaves gum like
deposits in the tiny holes (jets) that are in your carburetor. If this
happens, you will have to remove your carburetor, remove any rubber o-rings
or gaskets, and then soak it in a carburetor cleaner.
the kill switch set to "off"
the choke not set correctly? If I am not sure, I pull the air cleaner
and look inside the carburetor to confirm the position of the choke lever to
either open or closed.
the engine flooded? If the choke is closed and I see gas dripping out
of the air cleaner, or the engine will not even pop, this may be the
case. Flooding means too much gas has gotten in the engine.
Remove the sparkplug, and crank the engine over with the choke in the normal
position. If the sparkplug is wet, the engine has been flooded.
Cranking it with the plug removed will evaporate the gas. Put the plug
back in, do not choke and try to start the gas scooter.
the spark plug wire connected to spark plug? Remove the spark plug,
push it into the spark plug wire cap and while laying in on the metal
engine, pull the engine over using the pull-start or electric start. A
snapping sound should be audible and you should see a blue spark at the tip
of the spark plug.
the air filter wet or plugged up? A plugged or wet air filter can act
exactly like an engine with the choke on. You need to check your air
filter often and clean it, especially if you are riding in dusty
conditions. Under no circumstances operate your gasscooter with the
air filter removed. You will do major damage to the engine in a very
short period of time.
your gas scooter has an electric start, the starting switch may be faulty.
Not Stay Running:
your gas scooter will start just fine, but dies a few minutes later. These
types of problems can be harder to diagnose than a pocketbike that just won't
start! It's important to observe the events just before the gas scooter
stops running; were you turning left or right? Were you going over
bumps? Were you braking? All these observations can make gas scooter
troubleshooting much easier.
in your gasoline can cause this symptom, even if your gas is fresh.
Water gets in gas from condensation that can form when your gas can
experiences a temperature change (moves from cool garage into moist
air). Usually the gas scooter's gas tank will have small well, or low
spot where water and debris will settle. But, of course as you ride,
this pool can migrate into the suction of your gas line, and will kill the
engine. Take a flashlight and look into the tank through the gas
cap. If there is water, you will see it as small "beads" in
the bottom of the tank. This water must be removed either via a
mechanical siphon (don't try to use your mouth to start a siphon) or by
removing the gas line to the tank and catching the gas/water mixture as it
drains out the low point. Be sure to dispose of old oils and gas
loose sparkplug wire or bad sparkplug can cause this. Your plug wire
should attach very snugly to the sparkplug. Wiggle it and see if it
feels like a loose tooth. It should grip it tightly. Pull the
sparkplug and see if it's dirty or has a piece of carbon shorting out the
electrode. Clean it and put it back in and try again.
clogged or wet air filter can slowly choke the engine out. It may
start when it's cold and actually run ok until it gets warm, and then with
the too rich mixture it dies, cools off, and might let you restart it
again. Keep your filter clean!
kill or stop switch can go bad. Gas scooter kill switches can get wet,
or simply fail mechanically. Try disconnecting it at the engine and
try the gas scooter out.
filter is plugged. Some gas scooters have a gas filter in the gas
line, and will alter the fuel to air mixture if they get plugged, similar to
how a plugged air filter will. Replace the filter and try again.
is Low On Power:
problem will be evidenced by inability to climb hills, lower top speeds, and
general lack of engine responsiveness.
Scooter was driven without an air cleaner. When this happens the
internal clearances of the engine open up and two-stroke engine loses
compression. It may sound like the engine is running OK, but it will
lack power. The only way to fix this, is with a total engine rebuild.
cable has stretched. You are limited mechanically by how far you can
twist the throttle or squeeze the throttle lever. When the throttle
cable stretches, it no longer moves the throttle linkage on the engine
through its full range of movement and the top speed drops off. This
is an easy fix. Look at where the cable connects to the engine for a
small cable stop with a screw. Loosen the screw, and move the stop up
the cable towards the throttle. Don't move it too far, or the gas
scooter will not idle correctly.
chain has not been maintained. Keeping your chain well lubricated is
important. Use a high quality motorcycle chain lube, not oil for this
task. Chain lube is designed not to be thrown off at high speeds which
is especially important for belt/chain drive gas scooters. If a lot of
oil is thrown from the chain on to the belt, the belt will slip.
tire pressure. Of all the low power complaints I have diagnosed, this
one is the primary cause. Gas scooter tires need to be properly
inflated to maintain optimum performance. Check your owners
manual. Many gas scooters recommend tire pressure well in excess of
what a typical car or bicycle would take. They can be a pain to
inflate; you may have to get a pump with a screw style end instead of
a quick disconnect to fill them.
belts are slipping. Slipping belts overheat, glaze over and get
progressively worse. Some gas scooters have one belt, others two and
slippage from any of them can cause a loss of power. Be sure to keep
your belts properly adjusted. There is a product called "Belt
Grip" that comes in a small spray can that can help restore slipping
belts temporarily. You spray a bit on the offending belt and then can
test to see if the problem is a belt issue or one of the other issues
Here For Drive Train Problems
try to answer all your questions in the
articles above. Still have a question? Write to us at email@example.com
and we'll answer it.
GAS SCOOTER PARTS?
get mine from Neo
Scooters. What you see below are actual pictures from their
parts catalog. No more guessing if you have the right part by an
obscure description. They sort by the model of your scooter and
have pictures of each part, with the price and part number. With
Free Shipping Included, you cannot go wrong. Look for their
parts link in the lower left corner of the page the link below on the Neo
logo takes you to.
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