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The #4 spark plug quits firing after appx a tank of gas, install new spark plug & good to go for another maybe tank or 2. Plug looks good when removed, no oil, black suit nor nothing, slightly wet from unburned gas. Compression 110 on all four, replaced plug cap. Just wondering. wire or coil maybe??
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1983 GS1100E, 1983 CB1100F, 1991 GSX1100G, 1996 Kaw. ZL600 Eliminator, 1999 Bandit 1200S, 2005 Bandit 1200S, 2000 Kaw. ZRX 1100 -
That or the carb is dumping fuel way to fast for some reason???MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550
NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.
I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it. -
Maybe check voltage at the coil? 1-4 linked? If so and #1 is not fouling that suggests a plug wire on #4. If you can replace the wires on those coils you may as well try. Check plug cap resistance too. Sometimes the caps fail on the inside.Ed
To measure is to know.
Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182
Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846
Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf
KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-ResurrectionComment
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Excessive fuel will wash away the plugs colour. Does the exhaust smell of excessive fuel?Comment
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Sounds plug wire related as suggested. Or a coil that is failing."Thought he, it is a wicked world in all meridians; I'll die a pagan."
~Herman Melville
2016 1200 Superlow
1982 CB900fComment
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If 1 - 4 are linked just swap the plug wires and see if the problem follows the plug wire to #1 or stays at #4. If it follows the wire that will show it's either coil or the plug lead/cap. If not then it's likely elsewhere. Just one step in the process of elimination.'84 GS750EF (Oct 2015 BOM) '79 GS1000N (June 2007 BOM) My Flickr site http://www.flickr.com/photos/soates50/
https://farm5.staticflickr.com/4306/35860327946_08fdd555ac_z.jpgComment
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Thank ya'll, The plug doesn't look wet enough to be fuel fouled, nor is there a rich burning odor when new plug is in there. Already replaced the resistor, in the plug cap, with copper packing so the cap is good, now with no resistance. Wires on this coil are replaceable, I've got one on the way, should be here in a couple of days. I was wondering if a coil could possibly be bad on one side, wouldn't think so, but # 1 plug hasn't given any trouble. Hopefully just the wire. Thanks1983 GS1100E, 1983 CB1100F, 1991 GSX1100G, 1996 Kaw. ZL600 Eliminator, 1999 Bandit 1200S, 2005 Bandit 1200S, 2000 Kaw. ZRX 1100Comment
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