Question about 2003 Yamaha YZF-R6

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Electric is working and starter is clicking over. Getting no spark out of all 4 plugs. checked all wiring and grounds, all good. What should I check or do?

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  • Yamaha Master
  • 46,403 Answers

Hi, Kevin and the usual suspects are:
1. Fouled spark plugs.
2. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
3. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
4. Loose connection at ignition coil or plug between ignition sensor and CDI box.
5. Spark plug cables in bad condition, shorting / leaking, spark plug cable connections loose, check for spark leakage in the dark.
6. Faulty ignition coil, pick up coil, trigger coil or CDI box testing needs to be checked with an ohmmeter at 70 degrees Fahrenheit
7. Faulty safety switches clutch, kickstand, neutral, off/on etc.
8. Faulty ignition switch.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
2003 2004 Yamaha YZF R6 Service Manual R6 Moto Data Project
OEM parts for Yamaha

Posted on Sep 09, 2016


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Posted on Jan 02, 2017

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SOURCE: Engine wont turn over from starter motor...

my dad works for a starter and alternator repair shop, and as for the solenoid clicking really fast, means that battery is to dead, one click and no movement of starter also in dicates low baterry or starter is stuck in a "dead spot". have you taken the staret apart?? if so , were the brushes longer that 3/8 of an inch? and check the internal grounds, sometimes they get loose. my email addy is if u have any more questions or for more details, e mail me and i can help ya out.

Posted on Mar 20, 2009

  • 3567 Answers

SOURCE: Fzr 750 won't start

Best guess it that the OHC (Over Head Cam) chain is not timed properly. If too far out of time the pistons can bend the valves and crack the valve guides. Let's hope not. Put a timing light on it while the starter is turning the motor over. If the lines don't match up you had best take a look at the OHC timing.

Google " yamaha FRZ 750 RT " Right now there is a factory service manual for your bike for sale on ebay. A link to the Ebay site is there when you Google.

Please rate this answer. Thanks Maverick 24!

Posted on Apr 14, 2009

  • 180 Answers

SOURCE: I have no spark at

1. The on/off button on the right switch housing could be off. Turn it on
2. The on/off button could be faulty.Take apart and use test light to see if the switch is working by turning it on and off and see if power crosses the connection with the switch on
3. The ignition switch could be faulty. Test with test light to see if your getting power to you coil
4. The stator provides the power. Use Ohm meter, black to ground(green), and red to white wire, then red to yellow wire. the reading should be the same for the white and yellow wire. example: 288 and 288
5. The signal generator/pulse pick-up, send the signal to the cdi. Use ohm meter , black to one end of the wire and red to the other end of the wire, should read 000. if anything else the wire is broke.
This wire is usually black with a red stripe or red with a black stripe.
6. The cdi sends signal to the coil, to fire on time and advance and retards the fire as the motor revs and decelerates. Can be tested but not fixed, must buy a used or new one.
7. The coil provides the spark. Easiest to put a working coil on and see if it fires, if it does, then your coil is bad and just needs replaced.
8. Make sure if its on the kickstand that it is in neutral. Its a safety switch.
9.Make sure you have a good battery.Most local auto parts stores load test them for free

Posted on Nov 30, 2010

  • 5370 Answers

SOURCE: i have a yamaha 760(waverunner)

Try to start will cold start procedure:--- The procedure for a cold start is as follows: ----
- Fill the tank with gas/ oil as needed.
- Turn the gas on and pull the choke up.
- make sure that the kill switch is in.
- Press and hold the green start switch until the engine starts and stay's on. If you simply press the start switch, the engne will try to turn over and will not stay on.
- Turn off the choke after the engine is on.
---------- If the choke is problem, then you can eliminate choke by adding primer kit and try starting. With a primer kit you no longer need to squirt gas directly into the spark hole to make it start. Using the primer, just pump (about 5 pumps) raw gas directly into the carb throat. It starts right up. ------------ In many cases this problem is due to low fuel reason they do this is that the fuel is lower than the engine if the tank is low so you get air in the line. Pouring gas or starting fluid to turn over the engine will pull the gas from the tank, or using a primer kit. When cranking, you have to pull the fuel from the tank. ------------ Other possibility for loss of spark is loose starter wire.Get the battery to starter wire checked.Get the coil to spark plug wire checked.Get the fuel flow checked, get the fuel filter checked.If its clogged or dirty.It can be the cause.Also water in cylinders can cause this.or The carb getting dirty can cause this.check your separator, is there water in with the gas. If so, drain your fuel tank and refill with fresh gas.Also check the "T" handle screw on the side of the carburetor .Dont spin the screw.Just check, if its got loose, the retight it.Otherwise dont spin it.------------- This should help.Keep updated.Thanks.Helpmech.

Posted on Apr 08, 2011

  • 1508 Answers

SOURCE: I have a 1996 xj600

could be a bad wire or plug cap they have a resister in them, each coil fires two plugs, so if the other one works off that coil the cdi is probably ok.
pull the caps off and check the resistance from the plug wire back to the coil ground, they need to be the same, the wires are moulded into the coils so if one has high or open resistance-new coil required

Posted on Apr 09, 2011

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1 Answer

Why does electric clutch click and seems to be getting no spark

While sitting in the seat with the ignition key on you should be able to hear a click from the pto clutch when the pto switch is activated but this click is audibly different from the click of the starter solenoid. The starter will be disabled if the pto switch is on. If you hear the pto clicking while trying to start then there is a failure in the pto switch. If the starter solenoid was bad the starter would not engage. Check ignition switch, pto switch, and look for wires melted together. Also be sure grounds are good. PTO clicking on start and no spark could have a relation with the pto ground and engine kill wire.

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1 Answer


Not so many reasons she won't start. 4-Strokes are Simple!

Here they are:

Fuel Tank-> Fuel Line-> Fuel Filter-> Carb-> Intake (Valve)-> Piston-> Exhaust (Valve)-> Muffler

Carb (Old Style):
Fuel Side:
Fuel Bowl-> Float-> Needle Seat-> Fuel Ports (Venturi)
Air Side:
Air Filter-> Carb Air Intake-> Butterflies (2)
(Clean 'em ALL!)

Hardware (Motor):
Rotor (Magnets)-> Magneto (Ignition Coil)-> Spark Plug Wire-> Spark Plug-> Cylinder Head (Spark Plug Ground)

Kill Switches (Seat, Clutch, etc.)-> Spark Plug/Ignition Coil-> Ground
Key Ignition-> Battery->Starter/Generator

If one of those fail.......= Non-Starting 4-Stroke!

You are either getting too much, or too little. Too much = Carb.
Too little = Carb. Therefore, tear down the Carb (COMPLETELY-Careful!) and clean it up.

Grounding out the System (Kill Switches)
Battery-> Ignition-> Starter.
Magneto->Plug Wire->Plug (Check 'em all!)

May 28, 2009 | Mtd Garden

2 Answers

How do I verify spark is working?

There are spark (iginition) testers available, but the simplest way is to do what you are doing, plus a step. If you aren't grounding out the bottom "L" shaped part of the spark plug to a metal part of the engine, then you won't get any spark. So, here you go...

1. Remove spark plug.
2. Attach spark plug to wire.
3. Ground spark plug to metal (place the "L" on the engine block, etc... make sure no paint is in the way, it needs metal to metal contact.
4. Keep plug grounded and have a buddy crank the starter. That way you can really get a good look at the plug.

Best of luck!


May 18, 2009 | Garden

4 Answers

93 chevy s10 wont start

Does it crank the engine ? If not take a look at the starter connections and the starter.Replace the starter if nessesary.
Ok, now that you got the most common problems out of the way, you should check for spark at the spark plugs. Remove a spark plug and attached to the wire. Get a good pair of rubber gloves and put the thread of the plug to ground and crank the engine. The spark plug should spark a bluish spark. If it has an orange spark the spark plug or wire may be bad. if it does spark fairly good.

Check the fuel pump. if it has an electric fuel pump you should hear it when you turn the switch to on. It is a whirring sound. if you can't hear it. the Pump is bad or the shutoff valve turned off the fuel system. Check it to see if the button is up. If it is then the valve clicked off. Press it down. If it is down and there is no fuel the fuel pump is bad.

If it is a mechanical pump, take off the hose to the carb if it does have one. crank the engine . It should pump gas right away.

If it does have spark or fuel to the sytem, then it is a sensor or other problem.You will have to get a trouble code for it. to narrow everything down.

Check the timing belt or chain to see if it is still good and tight. If it is not your timing belt or chain skipped or cut off. you will have to replace it.

I hope you can get some help from this info . good luck

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