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Posted on Jan 02, 2017
SOURCE: 1997 cb500 won't start
finally sorted when I replaced both plugs. I've never come across one failing instantly before in 30 years of motorcycling (maybe that's because I ride old bm's!)
Posted on Feb 04, 2009
after a couple of years w/ more than likely fuel left in it all along, it now needs a carb cleaning.if you can smell that old turned to varnish smell, its time for a carb job. check for fire first, and compession(should blow your thumb off the hole)put fresh plug, check air cleaner,and flush fuel tank
Posted on Feb 19, 2009
SOURCE: honda pal 2 stroke scooter
Are you adding oil to the gas? (32/1 = 4 ounces per gallon)
Do you still have spark? Install a new stock spark plug.
Clean the carb, but follow these steps >
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. Let the bike warm up then set the idle speed. This process should get you back on the road.
Posted on Mar 31, 2009
I could not locate a diagram of your machine's carburetor. I can tell you, for certain, that the carb does have a rubber drain tube that goes from the bottom of the float bowl and vents to atmosphere beneath the vehicle.
There are three required ingredients required for combustion: fuel, compression, and a spark (at the right time). Try to find out which of these are missing. Loosen the drain screw on the float bowl. Is fuel present? Check the compression - you've got to see at least 140 psi for anything to happen. Pull the spark plug and crank the engine. Is there a spark?
If it has sat for an extended period of time (more than just a couple of months) then the carburetor will be plugged with fuel varnish. It is very easy to think you've got everything cleaned, when the jets are still plugged up. I would take the carb apart and remove the jets. Hold them up to a light source and look through each one. If you can't see through them, there's the problem.
Posted on Jan 09, 2010
You need to check if there is any leaks from the carb to the motor. Make sure the carb is clean. An airleak could prevent the motor from starting as well as checking the carb itself ....the floats the jets things in that nature.
Posted on Feb 13, 2010
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