Help - One cylinder not firing - Road Star Warrior Forum : Yamaha Star Warrior Forums

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Old 01-30-2007, 12:39 AM   #1 (permalink)
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Default Help - One cylinder not firing

Well I finally got my 05 midnight a week ago - Awesome bike. VH propipes, Barons BAK, PC3 - Dynoed the day I picked her up - chart says 90HP
Rode her this morning, all seemed good.
Installed a larger horn in the redundant coffin. Had to re-route the horn wires so I had the tank off.
Put her back together, start her up - struggled to start, then idled slow. Got on her & took off - Where's all the power gone - feels like only one cylinder running.
Straight back in to garage. Checked everything -looked ok.
pulled lead off rear cylinder plug- good spark.
Did same with fron plug - NOTHING
Pulled plug, fouled black. Earthed plug & turned her over - NO SPARK.

Now I am aint no mechanic, just a little handy, so I don't really know what's going on. Could I have done something when I took the tank off? Could the coil have died because I looked at it? CPS or TPS?? would they affect the spark to one cylinder only? - I did notice it running rough yesterday but then it came good again.

Anyinput is much appreciated - Thanks
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Old 01-30-2007, 01:03 AM   #2 (permalink)
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Default Re: Help - One cylinder not firing

Update : Yes, I messed it up with my F&^*$%ng around with wires. On my back looking up with a torch, I managed to spot that one of the wires going to the coil had come unplugged.
I lifted the Barons plate, plugged her back in & whammo she sings like a bird again.

So simple - but it caused me a lot of grief - Now I'm smiling again
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Old 01-30-2007, 01:16 AM   #3 (permalink)
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Default Re: Help - One cylinder not firing

Congrats on your Warrior. As far as the spark goes... did you richen her up for the Dyno?
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Old 01-30-2007, 01:27 AM   #4 (permalink)
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Default Re: Help - One cylinder not firing

Good, I am glad you fingered her out and that it was something that simple. I had almost the same thing happen to me.
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Old 01-30-2007, 09:35 AM   #5 (permalink)
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Default Re: Help - One cylinder not firing

quote:Originally posted by gtg_ozzie

Update : Yes, I messed it up with my F&^*$%ng around with wires. On my back looking up with a torch, I managed to spot that one of the wires going to the coil had come unplugged.
I lifted the Barons plate, plugged her back in & whammo she sings like a bird again.

So simple - but it caused me a lot of grief - Now I'm smiling again


Glad you figured it out, at least it was a simple fix. but DUDE, SERIOUSLY, a torch probably isn't the best way to find somehting like that, you never know what you might burn up. Try a flashlight.[[img]/emoticons/emotion-5.gif[/img]]
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Old 01-30-2007, 09:56 AM   #6 (permalink)
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Default Re: Help - One cylinder not firing

It makes you sick until you figure it out im a mechanic it happens all the time what a relief when you figure it out have fun with youre new bike
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Old 01-31-2007, 09:35 PM   #7 (permalink)
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Default Re: Help - One cylinder not firing

I think they call a flashlight a "torch" down under [[img]/emoticons/emotion-2.gif[/img]]
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