99 R6 Spark Plugs/coils/wires Question (and first start checklist) - Yamaha R6 Forum: YZF-R6 Forums
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post #1 of 20 (permalink) Old 05-11-2017, 11:32 AM Thread Starter
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99 R6 Spark Plugs/coils/wires Question (and first start checklist)

So, I've searched around and I'm not sure I've found the answer to my question, so I'm going to ask and you all can tell me an ideot if you feel you need to.

We've got a '99 R6 that we've modified pretty heavily and are now very close to trying to get started. However, we are not at all certain that we know what's going on with the spark plug coils and the wiring for them. Here's what we do know (or think we know):
  • cylinders go from 1-4 from stator side to clutch side
  • cylinder 1 gets orange and orange wires
  • cylinder 2 gets orange and black wires
  • cylinder 3 gets grey and grey wires
  • cylinder 4 gets grey and black wires

Can anyone either confirm that this is correct or tell me where I'm wrong? The above info should allow me to get the coils to the right locations so that the spark plugs actually fire at the correct time in the cycle, right?

Here's what we think we have ready to go:
  • kickstand switch is bypassed (it's going to be a track bike)
  • ignition switch, stop/run switch, and starter switch appear to be functioning properly

Additionally, here's what we've done in prep to make sure things work out well:
  • plugs are all new and gapped properly
  • coils all have proper primary and secondary resistances
  • carbs are clean and are getting fuel
  • engine turns over by hand nicely
  • oil pump is primed and oil is topped off
  • bike is in neutral

What are we forgetting before we try to fire it up?

Last edited by NitrusReigns; 05-11-2017 at 01:22 PM.
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post #2 of 20 (permalink) Old 05-11-2017, 11:44 AM
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Re: 99 R6 Spark Plugs/coils/wires Question (and first start checklist)

I can only confirm your wiring to the coils is correct.
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post #3 of 20 (permalink) Old 05-11-2017, 01:23 PM Thread Starter
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Re: 99 R6 Spark Plugs/coils/wires Question (and first start checklist)

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Originally Posted by Flyers28 View Post
I can only confirm your wiring to the coils is correct.
Thanks for that confirmation! That was one of the things I was MOST concerned with for sure!

Anyone else - any feedback and thoughts would be appreciated!
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post #4 of 20 (permalink) Old 05-12-2017, 02:41 AM Thread Starter
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Re: 99 R6 Spark Plugs/coils/wires Question (and first start checklist)

Well, we tried to start it and it turned over great with the starter, but didn't fire.

We confirmed again that it's getting fuel and I can't imagine that it's not getting air, so I imagine it's not sparking.

We will be attempting to check spark today, but since it shouldn't be a problem with the plugs or cool, what's the next most likely culprit? Reg/rec?

What else should we be checking right away?
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post #5 of 20 (permalink) Old 05-12-2017, 08:47 AM Thread Starter
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Re: 99 R6 Spark Plugs/coils/wires Question (and first start checklist)

It seems like our issue is probably spark-related, but I don't know what would be the specific issue or what to troubleshoot first.

Here's what we've checked or prepared already:
  • kickstand switch is bypassed (it's going to be a track bike)
  • ignition switch, stop/run switch, and starter switch appear to be functioning properly
  • plugs are all new and gapped properly
  • coils all have proper primary and secondary resistances
  • carbs are clean and are getting fuel
  • engine turns over without any trouble whatsoever
  • oil pump is primed and oil is topped off
  • bike is in neutral
  • neutral and clutch switches are wired properly (not sure how to test whether they are actually working though...)

I just need some guidance from some of the experts around here on what to do next to try to get it running (this is my first full rebuild project).

Thanks in advance for the help!
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post #6 of 20 (permalink) Old 05-13-2017, 11:22 AM Thread Starter
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Re: 99 R6 Spark Plugs/coils/wires Question (and first start checklist)

I just confirmed that I'm not getting any spark.

Not sure what I should start testing to find the problem.

Any suggestions?
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post #7 of 20 (permalink) Old 05-15-2017, 04:35 AM Thread Starter
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Re: 99 R6 Spark Plugs/coils/wires Question (and first start checklist)

Trying again to get some help with this - there is power at the coils, but there is no spark when I crank the engine over. I assume that for one reason or another the ECU isn't telling the coils to fire, but what I'm not sure of is where to start in trying to figure out WHY that would be happening. Any thoughts?
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post #8 of 20 (permalink) Old 05-16-2017, 04:58 AM
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Re: 99 R6 Spark Plugs/coils/wires Question (and first start checklist)

Run through the troubleshooting steps in the service manual, starts on 8-11. That is where I would start. That at least provides you a systematic approach which might present the problem along the way, or at least narrow the possibilities down.
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post #9 of 20 (permalink) Old 05-18-2017, 10:51 AM Thread Starter
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Re: 99 R6 Spark Plugs/coils/wires Question (and first start checklist)

Quote:
Originally Posted by Flyers28 View Post
Run through the troubleshooting steps in the service manual, starts on 8-11. That is where I would start. That at least provides you a systematic approach which might present the problem along the way, or at least narrow the possibilities down.
I've tried to follow this as much as I can, but since I don't have the "pocket tester" that the manual refers to nor do I know what it does to be able to replicate it with my multimeter. I've narrowed as many possibilities as I know how, but I don't know how to "check switch continuity" with my multimeter - not sure what they mean by that.

Can someone shed light on that?
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post #10 of 20 (permalink) Old 05-18-2017, 11:09 AM
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Re: 99 R6 Spark Plugs/coils/wires Question (and first start checklist)

I don't know why yamaha tries to make everything so special in their service manuals, but a quality multimeter will do it all. What brand multimeter do you have? It is usually a dial on the multimeter (usually paired up with other symbols like ohms for resistance) but sometimes its a symbol that usually represents sound coming from a speaker. When a circuit is a closed loop it makes an audible tone, if no tone you have an open circuit.

The picture shows a multimeter set to check continuity. Sometimes you will also have to hit mode till you see the corresponding symbol (see below where it says "detector") on the screen.
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