Join Date: Dec 2011
Location: Sunset Harbor, FL.
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When checking the spark at the spark plug. You need a spare spark plug. By removing the spark plug, the engine will rotate very easy. This is an abnormal test for checking for spark. By using a spare spark plug. This will keep the engine in a normal starting routine. Ensuring that the ignition system is operating as it is suppose to.
When an engine is not operated for a period of time. Longer than a few days. The oil that is coating the rings and piston drains back into the engine sump. Resulting in lost of compression in the combustion chamber. Downward motion of the piston is not able to create a low pressure area inside the combustion chamber. Resulting in no air/fuel mixture being sucked/pushed into the cylinder.
With the spark plug removed. Inject 2 to 3 teaspoons of engine oil thru the spark plug hole. Temporary install the spark plug finger tight. Spin the engine over for 10 seconds with the starter. Remove and clean the spark plug, with a chemical. Gas, lighter fluid, choke cleaner or brake clean etc, etc.
Reinstall spark plug, try and see if the engine will start.
Another piece of information to consider. Gasoline will change from a liquid to a vapor at -16 deg F (-26 deg C) under normal conditions.
With the Dead Head Fuel System (no fuel return hose from injector to fuel tank) on the cbr. When the cbr is left sitting idle for a period of time. The gas in the line from the fuel pump to the injector will turn to vapor and be returned to the fuel tank when the pressure is above 43 psi. If the cbr is left idle for 3 weeks. There is a good possibility that the line from the fuel pump to the injector is filled with fuel vapor.
As mention above. Cycling the Key to let the fuel pump operate a few times should help. The fuel pump is a low volume, high pressure type. Volume, 2.34 oz (69.2 cc) in 10 seconds. How much fuel or vapor is in the line from the fuel pump to the injector?
If your Waiting on me, You're Late.
1999 Black Honda VQR234se 43,000+ Miles
2001 Red Kawasaki ZR-7s 18,000 Miles
A Service Manual Each, + CBR250R.