Question about Motorcycles
Sounds like your battery/and or starter may be starting to go. Remove the battery leads and clean off any corrosion on the battery posts and on the connector on the ground cable (the usually black cable that goes from the negative post to the ground on the frame). If that doesn't fix the problem, and if the battery is more than a year or two old, replace it. If it still won't start, have a mechanic check the starter and starter clutch.
Posted on Nov 25, 2014
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Posted on Jan 02, 2017
SOURCE: cbr 125 choke problem
It sounds like the choke line may not have been routed correctly when the new one was installed. Remove the gas tank and check to see that the line is not being stretched anywhere along the way AND that the gas tank when re-installed is not stretching the line. The line may have been kinked when installed. Look at the mechanical movement of the choke at the carb. Does it operate freely? Remove the air filter and look inside the center of the carb, (you may need to use a small mirror for this), does it look like the choke is opening and closing properly when the choke is moved on and off?
Posted on Mar 14, 2009
I had this problem before. Here a quick glimpse of what could have been the problem:
Fuel is is filled into the carburetor by the float switch. Starting from cold, its just normal that the carburetor is up and ready for a start. As you cruise along, the carburator is filled up with fuel coming from the fuel tank and is regulated by the float switch. Now, if the engine consumes more fuel than the rate of flow by the float switch, then it will drain the carburetor fuel reservoir empty. What could be the cause? You guessed it right... dirty jets or clogged fuel jet on the float switch. Solution: Open up the carb, clean every hole with wire brush. Blow compressed air on the needles and every hole you could see.. Take not of the ball bearings inside make sure there isnt anything loose when blowing with compresssed air.
Assemble the carb back and cruise for 20 minutes.
Other cases: dirty spark plugs, missfiring plugs, or worse case, CDI ..
Let me know if this helps.
Posted on Mar 17, 2009
Posted on Mar 23, 2009
Remove the water trap bowl at the bottom of the petcock, (gas valve). Any water or trash in the bowl? Drain a cup of gas from the tank. 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 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 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 two screws on the outside throat of the carb and spray into the screw holes as well.
< < READ CLOSELY > >
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. Set the idle speed with the idle screw. This process should get you back on the road.
Since you mentioned uneven idle revs, be sure the carb and manifold are on tight and also tighten the cylinder and head. Air leaks can screw up the idle.
Please rate this solution. Thanks speedfreak41
Posted on Apr 04, 2009
is it getting fuel? try tipping a very small amount of fuel down rhe plug hole, replace the plug if it fires you have a carb problem.
Posted on May 02, 2009
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