Question about 2007 Bajaj Bajaj Avenger

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The scooter will not start and gas drains from the carburator

When I try to start my baja sc 50 motor scooter it sheds gas from the carburetor and creates a small puddle of gas on the garage floor.. I is new but used to start okay. I checked the plug and I can see a little spark. The other day it wanted to start but didn't and the gas came from the carb again. Also the plug is wet when I check it. In sum it turns over, but will not start and leaves a small puddle of gas. What do I need to do to fix it?

By the way I could not find the right motorcycle type but I had to select something to be able to send this message.

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The float is sticking, rebuild or spray carb clean into carb very well to free dirt

Posted on Aug 01, 2009


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I have a taotao 50 scooter nd i got water n the carborater

Easy fix. Take the intake flexible pipe from the gas tank and drain out the fuel. .Then remove the carburetor bowl. Used compressed air to clean. Remove the spark plugs individually an blow compressed air back through the pistons. Add a starting accelerant to dry the heads. Add new gas with a clean up solution for the gas. start and run. Fare well.

Jul 07, 2014 | Motorcycles

1 Answer

Ran my baja sc125 til it ran outta gas, filled it, now it wont start

Hi, Carlos if you have an old bike that has not had regular fuel system maintenance and you run the fuel tank dry I feel your pain. All the contaminants water-dirt-rust-liner paint flakes-ethanol sludge etc. that lived in the bottom of your fuel tank get mixed with the last few oz. of fuel left in the tank and enter the fuel system clogging up fuel filters-fuel valves-fuel lines-carburetor jets-needle jets and seats-fuel injectors etc. You fill up your fuel tank and guess what your bike does not start or if it does it runs like dog caca, a complete cleaning of the fuel system is mandatory, the procedure is as follows:
1. Drain the fuel tank and inspect the inside for leftover uninvited guests decontaminate as necessary for rusty environments install a liquid fuel liner.
2. In tank fuel pumps with external filters need to be cleaned.
3. Fuel valves need to be rebuilt with a new gasket kit.
4. Fuel lines need to be inspected for integrity and replaced as necessary any inline fuel filter should be cleaned or replaced.
5. Carburetors need to be disassembled then "DIPPED" and soaked in a commercial carb cleaning solution Gunk sells 1/2 gallon pails with meshed screen baskets. Reassemble using new rebuild kits. Record all jet sizes and float level for fine tuning.
6. Fuel injectors and fuel rails need to be properly cleaned and tested for optimum performance, if necessary send off any suspect injectors to "" for a modest fee they will refurbish the unit back to factory specs.
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1989 Yamaha Razz stalls when throttle applied

Hi, Dstelte and the usual suspects are:
1. Idle circuit and transfer ports clogged.
2. Air fuel mixture adjustment too lean.
3. Pilot jet clogged.
4. Faulty accelerator pump.
5. Float level too low.
6. Float bowl contaminated old fuel, water, dirt, rust, etc.
7. Float bowl vent or overflow tube clogged.
8. Fuel flow to carburetor restricted.
9. Intake manifold leak.
10. The gas cap is not venting properly or fuel tank venting system blocked.
11. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
12. Needle and seat stuck closed in the float bowl.
13. Multi carburetors not in sync.
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I have a Yamaha super jog 90 motor scooter which I inherited from my Grandson.He was involved in an accident and the scooter was damaged a fair bit.It was stripped down for a rebuild and when assembled...

Typically there is a vacuum fuel petcock involved. When the motor is turned over a small vacuum line opens the fuel petcock and fills the carburetor with gas. If the vacuum line is not hooked up correctly the fuel will not flow when vacuum is applied. If the petcock is stuck, the fuel will not flow. Also if the carburetor has been sitting with old fuel in it for a while the float needle may be stuck closed stopping fuel flow. Clean the carburetor and inspect the fuel petcock for operation and correct hook up.

Dec 28, 2010 | Yamaha G5 Motorcycles

1 Answer

I cant get my kids 49cc quad to start from new...can anyone help?

Check for spark, there may be a "Kill Switch" or a key somewhere that needs to be turned in order for the motor to run. If you turn the motor over with a spare spark plug in the plug wire touching the tip of the spark plug that is in the motor it should show a spark. (It is best to do this in the dark to see the spark clearly)

Look for a fuel valve that shuts off the flow of gas typically located between the gas tank and the carburetor. Some carburetors have a float bowl drain at the bottom so you can drain the gas out for storage. If your carburetor has a drain bolt you can unscrew it and see if gas comes out.

Check for a choke lever or pull knob either on the carburetor or sometimes on the handlebars. I have also seen a primer bulb on the two stroke carburetors that act as a fuel enrichment for starting a cold motor.

Since it is new we can assume it has compression but it doesn't hurt to check it. Remove the spark plug, place your finger over the spark plug hole and turn the motor, if there is good compression your finger will pop off from the pressure.

If you have good spark, good compression and gas in the carburetor bowl chances are your carburetor jets are clogged. I would spray a small amount of starter fluid or a small squirt of gas into the back side of the carburetor after removing the air filter. If it runs for a few seconds then stops the problem is in the carburetor but most often the motor will continue to run and just needed priming. If it does not run on it's own there might be some debree in the float bowl obstructing the delivery of fuel but that is very rare for a new carburetor

Dec 29, 2009 | Quad 47 cc / 49 cc Pocket Mini Bike...

1 Answer

Where to hook vacuum lineon might carburetor Jeda 50 cc

The vacuum port is near the mounting flange, sticking out horizonally near the top on the right side just above the fuel inlet. This vacuum is used for the fuel pump or the fuel shutoff valve, otherwise it is plugged off.

Sep 28, 2009 | RTO Gas Motor Scooter

1 Answer

Have baja 125 motorsport idels fine but when throddle up it dies

ALWAYS have a fire extinguisher at hand when working on carburetors.
Remove the water trap bowl at the bottom of the petcock, (gas valve). Is there any water or trash in the bowl? Drain a cup of gas from the tank. Is there any water or trash in the cup? Dump it, clean it and re-mount it, ( not all bikes have a water trap bowl ).

Drain the carburetor. There may be a screw on the lower side of the carb float bowl. Remove the screw then replace it after the fuel drains. Turn the gas back on and wait a minute for the carb to fill with gas. Install a new stock NGK spark plug and try to start the engine. If the bike doesn't start and run properly then shut off the gas and remove the carburetor from the engine.

Remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray into all the little airways and fittings in the carb. Remove the idle screw and the air screw on the outside throat of the
carb and spray into the screw holes as well.
Be sure to put these two screws back in the same hole they came out of. IMPORTANT > do not tighten these two adjusters down. Only screw these in until they LIGHTLY seat. Now turn each adjuster one and one half turns outward. Put the rest of the
carb back together, clean the air filter and install the carb. Let the float bowl fill then start the engine. This process should get you back on the road.

Please rate this solution. Thanks!

Apr 30, 2009 | 2007 TN'G Baja 150

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