Question about Motorcycles
When the start button is pressed the engine turns over and the yellow cautionary 'motor' symbol illuminates but the engine does not fire.
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Posted on Jan 02, 2017
SOURCE: 1986 yamaha fz400 wont start
You need fresh gasoline in it, if it's been idle for two(2) years, you also have to clean everything that your gasoline touches like the tank, fuel filter, fuel line, carburator, before pouring it in. If that wont help you, Have your CDI tested if your plugs wont spark. Also ask for the history of your bike, if it was running before they stopped using it.
Posted on Nov 22, 2008
SOURCE: Starting Problems Yamaha TTR 125
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.
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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. Be sure the bolts are tight. 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.
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Posted on Apr 05, 2009
You have a loose connection to the ignition system . When cranking make sure it is in neutral. and kill switch is in run position. The only thing dropping would sensibly affect is the fuel system or jarring a switch., but with the suspension you have there really is no jarring. So, I would ck the wiring. something is loose.
Posted on May 29, 2009
Check to make sure your getting gas by pulling off the hose, if no gas comes out your petcock is clogged. If this is the case blow air up into the hose, and if gas comes out now your tank has to be cleaned out.
Posted on Jun 23, 2009
SOURCE: yamaha tw 125
The noise you hear is valve clatter. You should not adjust your timing chain. Instead get a manual and find the vlave clearances for that bike. (Ex. The exaughst valve may be .006" and the intake valve may be .004") Then you'll need a feeler gauge, and to do this you'll remove the valve covers and get the engine to TDC (Top Dead Center) This is where the piston is at the very top of it's stroke and both valves are shut. (compression stroke) You must then loosen the rocker arm nut to the point that you can insert the feeler gauge between the rocker arm and the top of the valve run the nut down tight to the feeler gauge and then pull gauge out and repeat on the other valve.
Posted on Aug 24, 2009
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