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Zongshen 125 pitbike I got fuel , spark, and good compression , ive dipped carb 8 times and ran wires thru the ports and it still wont run without eather , please help

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  • Sterling Power
    Sterling Power Nov 02, 2015

    It's the hoses in the fuel line. They are water grade not fuel.

  • jiffs harry
    jiffs harry May 20, 2017

    Can I have the Zongshen Triax 125GY my whatsap is +4591665847

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1 Answer

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  • Zongshen Master
  • 57,709 Answers

Hi Ben, you could have bad fuel, blocked or clogged float bowl vent line, fuel line, faulty petcock, or fuel tank or cap not venting properly. for more information about your question please visit the website below. Good luck and have a nice day.
http://www.skirmishday.com/catalog/z/zongshen-pit-bike-service-manual.pdf

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

Posted on Sep 28, 2015

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE:

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Posted on Jan 02, 2017

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FoRdMaStEr
  • 53 Answers

SOURCE: 1997 yz 125 wont start, please help

2 stroke bike are very dependent on compression. and being a bike that is 12 years old my best educated guess is that the top end needs to be rebuilt. i usually have to have the top end done on my honda about every three years.

Posted on Jan 13, 2009

  • 3567 Answers

SOURCE: dead pw 50 and sad boy.

Many things could cause the problem. Let me see if I can help out.
You have spark, but is it enough spark? A weak battery can rob power from the coil so only a weak spark is present. Get a new stock NGK spark plug to eliminate the possibility of a problem plug.

It is good that you cleaned the carb because that would be my second target. Reset the air and idle screws. IMPORTANT > do not tighten these two screws down. Only screw these in until they LIGHTLY seat. Now turn each screw one and one half turns outward. Clean or replace the air filter and be sure the bolts are tight on the carb manifold. INSTALL AN IN-LINE FUEL FILTER. Let the float bowl fill then start the engine. Set the idle speed with the idle screw.

Remove the cylinder head. run the piston down to the bottom of the cylinder. look inside the cylinder. On th carb side (intake) you will see an intake port > a large hole that lets gas into the cylinder. Now look at the exhaust port. It is possible the exhaust port is pretty plugged up with carbon. The intake and exhaust ports should be approximately the same size. Are they? If not then remove the muffler and take a screw driver and plastic hammer and knock the carbon into the cylinder, thus enlarging the exhaust port to its' proper size and allowing the exhaust gases to escape. Vacuum the carbon out of the cylinder. De-carbon the piston top and the cylinder head.

Get back to me and tell me what you find. If more is needed we will go further.

Posted on Apr 12, 2009

jigsaw_9077
  • 308 Answers

SOURCE: i have a 1991 cr250 wont start it has compression

just adjust the accelerator cable that is connecting to the fuel pump.check the and repair the throttle cause its the reason why it wont start . Its flooding the because of too much release of gas to the carb.

Posted on Jul 28, 2009

  • 1 Answer

SOURCE: 1983 honda GL1100I, New spark plugs, good

When I recently ordered parts from Saber Cycle, they included a piece of information that pertained to my motorcycle, which is also a 1983 Honda Goldwing GL1100 Interstate. Here is what it says, I hope this helps:

Air Cut-Off Valve

The air cut-off valve is an extremely important part of the fuel/air intake system that is frequently missed even my competent mechanics, most of whom are not even aware of its existence or how it functions.

Every GL1000 has one, located in the air intake tube, between the air cleaner box and the manifold. Every GL1100 has four, located in the top air intake passage of each carburetor, and every GL1200 has one located in the plenum box below the air cleaner box similar to the GL1000.

These valves are "air blockers", along with the carburetor o-rings, serving to restrict air flow and increase the fuel/air mixture ratio when the carb slides are in the lower RPM range, up to closed so that the machine will start and idle smoothly with virtually no choking and accelerate rapidly, with no stumble or hesitation.

When typical starting requires heavy and prolonged choking to keep the bike running, when stalling and hesitation occurs even while "warmed up" and when backfiring pops while the throttle is shut off while cruising, most people will start fooling with the air screws to try to overcome the problem, only making it worse along with reducing their gas mileage.

Running with dysfunctional air cut-off valves can causes severe engine damage or failure. When the valves are dysfunctional, the engine pulls nearly total air in the low RPM range through the carbs and on to the combustion chamber. The fuel/air ratio is extremely poor with pre-ignition long before the normal 38 to 40 degree firing point, generating an enormous amount of heat, with no power, which is trapped a longer period of time in the cylinder before the exhaust valve opens.

This heat goes mostly up through the cylinder head, gradually incinerating the head gaskets and allowing engine coolant (anti-freeze) to seep into the engine. You can easily spot when you are in trouble by a puff of bluish-white or white smoke on first starting the engine. Don't leave it alone. Change head gaskets immediately or you could take out your bottom end bearings, ruining the engine.

For those of you installing new exhaust systems, you will discolor your headpipes, either blue (lean state) or gold (rich state). You can destain your pipes using "blueaway" or "blue-off" but be careful not to rub the chrome, just dab gently.k These compounds are usually purchased at a Harley dealer or Harley oriented aftermarket shop.

Honda genuine pipes, like many Yamaha pipes, have a double wall for a portion of the headpipe which masks this discoloration-but also masks a bad state of tune. Even if your pipes are original and still in good shape, don't think that you are OK if the bike has any or all of the dysfunctional air cut-off valve running and performance characteristics.

If your 1975 to 1987 Gold Wing is not getting 50-58 miles per gallon (20-23 KM/Liter), you have one of the most obvious signs of trouble. It is likely your air screws have been backed out to try overcome the effects of the poor running, stumbling, starting and stalling and quitting.

Resynchronize all four carbs to the #3 carb vacuum level using mercury carb sticks or vacuum dial gauges. Stay with strict use of the setting levels in either the Honda, Clymer or Haynes manuals. Do not attempt to tune any other way! Guessing will not work and can cause considerable engine damage!!!

Posted on Sep 26, 2009

wd4ity
  • 4565 Answers

SOURCE: suzuki gn125 wont start. checked carb, cdi, coil.

Check the valve adjustment. If a valve is standing open just a little, the compression will be too low to start the engine. Check fuel delivery by dribbling a little gasoline into the carb and try starting the bike. If it starts and runs for a second or two, you're not getting fuel into the cylinders. Check you carb again.

Posted on Oct 19, 2009

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My 2001 arctic cat 400 has blue spark and is getting gas ive timed it cleaned the carb checked the cdi box put fresh gas and it has good compression and it still wont start


Hey Krey (cute name)..
An internal combustion engine requires three things to run:

1. A properly timed spark
2. Sufficient compression (120psi+)
3. Proper fuel/air ratio

I would suspect the carburetor in the issue...take it to a qualified professional... they will get it running...
Good luck..

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Any help please 2007 Zongshen zs250-5 cruiser will only idle with choke on


Hi, Wazza and the usual suspects are:
1. Fuel cap or fuel tank is not venting properly.
2. Fuel filter clogged.
3. Fuel line pinched or kinked.
4. Vacuum line from the petcock to intake manifold cracked.
5. Float needle and seat sticking.
6. Float level too low.
7. Carburetor bowl vent line clogged/blocked/pinched.
8. Idle adjusting screw set too low.
9. Air/fuel mixture screw set too lean.
10. Idle port, transfer ports, slow air jet clogged.
11. Slow fuel jet clogged.
12. Faulty fuel pump.
For more information about your issue and valuable "Free" downloads that you will need please Click on the blue links below. Good luck and have a wonderful day.
2007 Zongshen 250 5 fuel and vacuum line routing Google Search
http://www.miniriders.com/carby-and-tuning/32092-250-thumpstar-wont-idle-without-choke.html
http://www.family-motorsports.net/GY6-50cc-150cc.pdf
http://absolutelyscooters.net/service-manuals.html
ZONGSHEN ZS250GY 3 EFI Maintenance Manual

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

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1 Answer

1989 yamaha banshee no start


no you cant put them in upsidedown if they are not indexed to fit one way then you can run them either way.we need to consider a few things first spark if we have spark havve we checked the flywheel to make sure the key is not sheared and it is tight. next compression i assume since we did a top end compression is good but what about crank seals if they have never been done and are leaking transmission oil will get on ththe plugs and foul them. next fuel if gas is in the float bowls is it getting though the jets take the air filter off and spray starting fluid in the carb throat kick it if it fires for a second the carb jets need to be cleaned all that is left is air and i know you have that covered i hope this helps these 4 things are what make engines run so if you get all 4 its gonna run good luck dirt bike dan

Apr 18, 2013 | Motorcycles

1 Answer

2003 yz125 wont start


Not much info to go by, but i'll give some things to check. Got fuel? Got Spark? Got Compression? If you have all these things, after kicking several times, pull plug to see if the plug is wet. If wet dry with compressed air, ground plug on head bolt or use spark tester, Kick engine over while watching plug, it should spark. If not replace and try again. If still no spark, check kill switch with ohm meter to make sure is working properly. If still no spark you will have an electrical issue with either the CDI Box or Stator. If the plug was dry without fuel, pull fuel line from carb. check to make sure fuel is running, if not check fuel shut off valve. sometimes the shutoff valve will clog up. If all is well it has to be a clogged carb.. Good Luck

Dec 05, 2010 | 2003 Yamaha YZ 125

1 Answer

I have a 1991 honda cr 250 I cant get to start at fist gas ran right thru carb and out bottom i took carb apart and got the floats to stop sticking cleaned it out with carb cleaner put back together but...


try a new spark plug. if u fowl out a plug some time they will not fire under compression.2 strokes need. fuel,fire and air, very simple engines.it is possible crank seal are bad .that doesn't allow the engine to create vacuum in the crank case.thus fuel and air will not make it to combustion chamber.

Jul 11, 2010 | 2002 Honda CR 250 R

3 Answers

MY SON HAS A TTR 125. IT WONT START. HAS NEW PLUG, NEW GAS, I JUST FINISHED REBUILD KIT ON CARB. ITS GETTING SPARK, ITS GETTING GAS IN SEDIMENT BOWL. IT WILL ACT LIKE IT WANTS TO START AFTER ABOUT 10...


A rebuild kit on a 2004? Why was that needed?
I would do a compression test to verify that the ring, and valves are working for you. Should be above 100 psi. (Throttle open while kicking it over) This may help get you started toward a fix.

Jun 09, 2010 | 2004 Yamaha TT-R 125 L

1 Answer

Yamaha dt 125r wont start.


have u got strong compression u mite of done the rings take the exhaust off and look in through exhaust port this will give u a good idea if not the look at mixture

Mar 04, 2010 | Hotpoint Aquarius WD640 Front Load...

1 Answer

It wontt start it has spark


There are only three things that your bike needs to start, Spark, Compression and Fuel, if you say that it has spark and compression then the problem has to be fuel, Make sure that there are no blockages in the line from the tank to the carb, if that is not the problem then you will have to pull the carb and clean out all the ports. I disassemble them as much as possible and empty a can of carb cleaner into a clean coffee can let it soak overnight and then blow out all passages with compressed air and reassemble. You should also pull off your reed cage and check to make sure that your reeds aren't cracked or broke. If your bike was runninng before and you give your carb a good cleaning and the reeds look good and it still doesn't work then you are going to have to look at the other two requirements, your spark should be a bright blue, if not try a spark plug first (you may want to try that before the carb cleaning) next you should get a compression tester and check the compression to make sure it is high enough. Your bike might feel like it has lots of compression but it might be low enough to make it hard to start.

Dec 09, 2009 | 2003 kawasaki KX 125

1 Answer

Suzuki gn125 wont start. checked carb, cdi, coil. got compression and spark but it wont fire. timing been checked. i have ran out of ideas.


Check the valve adjustment. If a valve is standing open just a little, the compression will be too low to start the engine. Check fuel delivery by dribbling a little gasoline into the carb and try starting the bike. If it starts and runs for a second or two, you're not getting fuel into the cylinders. Check you carb again.

Oct 18, 2009 | 2004 Suzuki DR-Z 125

1 Answer

New fuel lines, wont stay run, swapt in/out line, wont stay run


Sometimes simply removing the carb and placing it in a carb dip will clean it without tearing it apart, also check or replace the spark plug. Make sure you have compression, good spark, and that fuel is getting to the carb. If that doesnt work, email me and I'll find you a diagram. Jblee1975@yahoo.com

Jul 11, 2009 | Craftsman 25cc Gas Line Trimmer

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