Question about 2006 KTM 125 EXC

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Not starting Engine was removed and all new gaskets were put in. Engine was cleaned up and put back togeather. Bike is getting fuel but wont start only get a back fire. Spark plug is fireing.

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  • Roscoe007 May 11, 2010

    Remove the spark plug and try to start ,see if you have too much fuel in cylinder or no fuel in cylinder. Trying to see if its carb ,or ignition problem.

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  • 29 Answers

Check the vacuum pipe is in place on carb

Posted on Dec 15, 2008


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1 Answer

Bike wont start


Sometimes it helps to remove the spark plugs, clean them then warm them up with a hot air gun or similar. You'll get a stronger spark and often that is all that is needed to give it then extra boost. Failing that it's time to clean the fuel system as it may be the dried residue from old fuel blocking the flow. You should get an idea of this when you remove the plugs. If you've been trying to start it they will be wet with petrol. if not you've probably got a blockage.

Oct 10, 2014 | 2007 Yamaha V Star 1300 Tourer

2 Answers

Kawazaki kdx 125 wont start


KICK HARDER TRY PULL STARTING IT..IN SECOND GEAR..DOES IT HAVE ENOUGH COMPRESSION TO START?IT SHOULD START PULLING IT...START OFF WITH NO THROTTLE THAN IF NOT STARTING CRACK THE THROTTLE SO LIGHTLY AND SHE SHOULD FIRE OFF WHILE IN GEAR BEING PULLED OF COURSE BE CARE FUL NOT TO RUN INTO. WHO EVERS PULLING YOU..USE A LONG TOW ROPE..IF YOUR NOT A SEASONDED RIDER AND KNOW YOUR BIKE VERY WELL I WOULD NOT ATTEMPT THE PULL START...IF NOT CHECK YOUR COMPRESSION AND TIMING..MAJOR VACUUM LEAK MAYBE AT BASE GASKET..IS ENGINE SUCKING TO MUCH AIR? GOOD LUCK..

Mar 02, 2013 | kawasaki KDX 125 Motorcycles

1 Answer

05 zzr 600 dies when driving and wont start back up


How long has the bike been sitting? Sounds like the carbs may be gummed up,and in need of a professional cleaning,and re-synchronizing.

Aug 29, 2012 | 2005 kawasaki ZZR 600

1 Answer

My bike is cranking over but wont start.. iv put a new spark plug and checked for spark.. cleaned the carb.. im getting fuel. checked all my wiring all is good..


have you checked that you have compression? remove the spark plug and put you finger over the hole and try starting the bike your finger should be pulled into the hole
and how old is the fuel? it starts to break down after a few months

hope this helps

John

May 23, 2011 | 2003 Yamaha TT-R 250

2 Answers

Ive just put a anew battery and plugs on my bike,but it still wont start,i have checked and there is a spark on the plug and the bike is turning over but it isnt firing


Remove lh cover from air filter ( chrome cover) and spraysome easy start into the housing while turning the engine over, you could also soak a cloth in fuel, and hold it in the ail filter housing with filter removed, this way when you attemt to start it the fuel on the cloth will enter the engine and hopfully your bike will start, quickly remove the cloth or the engine will flood, if the bike starts hold the throttle at a steady 3000rpm for a miniute or two, until the bike will idle if your bike runs then stops after this, you may try draining the fuel from the carb by undoing the screw at the lowest point of the carb, let it drain completely, in severe cases you may have to remove and cleanout carb

Feb 25, 2011 | 2000 Suzuki VL 125 Intruder LC

1 Answer

I can get the engine started with the aid of the choke but cannot get the engine to rev at all. the engine just stops at anything near 2000 rpm. have had both carb stripped down and cleaned as the bike has...


Hi Roy ,

Your bike has been sitting in storage and the fuel is too old ad is stale by now .
Re open the carby , clean it properly with new fuel , all the jets need to be inspected for dirt or residue left by the old fuel , drain all the fuel out of the tank and replace it by new fuel .
The old fuel leaves a deposit film which needs to be clean so the best way is to pour a little fuel into your tank , shake the tank to clean it and drain it again .
Make sure that all gasket in the carby are clean or new as extra air intake will make the bike run rough .
Try all this and you will see that the bike will run better .

Jan 05, 2011 | 1997 Aprilia Pegaso 650

2 Answers

My 2001 cr125 wont start


first you need spark compression and fuel. remove the spark plug and place it on the head crank it over you should have spark also place your finger over the spark hole and crank it over it should push your finger off and last if the bike has sat for a long time it could have a cloged carb. also what did you replace to start with?

Apr 08, 2009 | 2002 Honda CR 125 R

1 Answer

Bogging


Remove the water trap bowl at the bottom of the petcock, (gas valve). Dump it, clean it and re-mount it, ( not all bikes have a water trap bowl ). Install an inline fuel filter.

Drain the carburetor. There should 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 or 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 all the little airways and fittings in the carb. Remove the two screws on the outside throat of the carb and spray into the screw holes as well.

< < READ THIS CAREFULLY > >
Be sure to put these two screws back in the same hole they came out of. 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. 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 as " FixYa " if all goes well. Thanks

Mar 29, 2009 | 2005 Honda CR 250 R

1 Answer

Bike wont start


First thing > install a new set of the stock NGK spark plugs for your bike. Check for spark before installing. If no spark, then check to be sure the battery wires are clean and tight. Is the kill switch on? Is the side stand up? It should be up when starting. Is the bike in neutral? Check the fuses. Check the wiring connections, are they tight?

If spark is present, is the gas turned on? Clean or replace the air filter. If the bike still will not start go ahead and drain the
carbs. There should be a screw on the lower side of each carb float bowl. Remove the screw then replace it after the fuel drains. Turn the gas back on and wait a minute for the carbs to fill with gas. If the bike doesn't start properly then shut off the gas and remove the carburetors from the engine.

For both
carbs > 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 all the little airways and fittings in the carb. Remove the two screws 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 screws down. Only screw these in until they LIGHTLY seat. Now turn each screw one and one half turns outward. Put the rest of the
carb back together. Remount the carbs.

Next, remove the water trap bowl at the bottom of the petcock, (gas valve). Dump it, clean it and re-mount it, ( not all bikes have a water trap bowl ). Turn the gas back on to let the float bowls fill then start the engine. Be sure to balance and sync the carbs when finished. If you don't know how to balance and sync the carbs, get back to me after you do the stuff mentioned above. This process should get you back on the road.

Please rate this solution as " FixYa " if all goes well. Thanks!

Mar 28, 2009 | 2008 Harley Davidson VRSCAW V-Rod

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