REPLACED THE BATTERY. AGAIN STILL NO FIRE CHECKED FUSES ALL GOOD. GOOD STRONG TURN OVER BUT NO FIRE. CHECKED SPARK AND SPARK PLUG WIRES. ONE COIL BAD. REPLACED STILL NO FIRE. PULLED FUEL PUMP TESTED , WORKING FINE MONTH OLD RECTIFIER. REPLECED CDI BOX AND ANOTHER BATTERY.(NEW) STILL NO FIRE EXTREMELY FRUSTRATING. WHAT ELSE IS A POSSIBILITY?
SOURCE: 2000 V-STAR 650 YAMAHA CRUISER
1. #1 test. Obtain a 12 volt circuit tester, the type that looks like an ice pick with a wire coming out of the handle. With ignition on, hold the tip of the circuit test against the post of the coil, the post that is marked with a + The light in the tester should light up, meaning you have battery power. If you don't have electrical power there, trace back to battery to find out why. If you do have power at that point
2. Moving the the opposite side of the coil and place the tip of the tester again the post marked with a minus. With the key on, crank the engine. The light in the tester should flash. These 2 test have just tested your battery and ignition system. Bill
SOURCE: TTR 90 wont start. Not carb. Not CDI. Plug cap?
Every component plays a part in the ignition system. Check the wiring as you go. Start at one end and move forward. You have done a lot of work so far. so you should be close. If the igniter is fine and the other components too. Then it would narrow it down to an electrical problem or no signal/pulse to the coil. See if the coil is receiving that pulse. you can use a test light for this test. Pos. will be power and NEG. will be the pulse. With light on the NEG. crank the engine over and see if it flashes. Let me know how its going.
SOURCE: I have a 1985 xv700 virago. one of my plugs are
follow the plug wire back to the coil and see if there are any breaks, if not might switch coil with the other one and see if the other plug now misfires, if so replace the coil, most cdi problems are not intermittent, typically they either work, or they dont.
SOURCE: 2000 yamaha YZF 600r wouldnt start
i suspect the battery is problem.Also you may have an electric fuel pump that is acting up.
SOURCE: why does my ttr 125 not start then backfires?
Your bike has a diaphragm on the carb. Every time you twist the throttle a shot of gas goes into the cylinder. Chances are you are flooding the engine by twisting the throttle too often. Flooding can create a backfire. Start with a clean dry plug. Twist the throttle once then leave it alone for about six kicks. Repeat the process if needed.
Testimonial: "thanks i it doesnt start well unless i rev it but i tried turning up the idle and its fine now and doesnt backfire as much thanks again"
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