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  #1  
Old 05-18-2018, 08:14 AM
TADracer TADracer is offline
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Location: Kenner, Louisiana USA
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No ignition at all

Hi everyone, it has been awhile since I attended the forum. Hope everyone is well.

My 79SF has sat for a year and I am disappointed in myself for letting it get in such shabby condition. We had a hard winter down here in New Orleans and it spent the winter under the carport with a cover over it. When I took the cover off I was really saddened at the condition I let my pretty machine get to. Even had a small nest of rodents camping out on top of the engine under the carbs.

I did a cursory check of the wire harness and do not see any evidence of wires being chewed by my tenants over the winter.

Anyway, I get absolutely no spark from either coil. The fuse is good and since I am not much of an electrical guy I hesitate to just start fooling around with stuff without seeing if anyone has any suggestions where I should start.
Thanks in advance for your input

Mike
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  #2  
Old 05-18-2018, 01:35 PM
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DiverRay DiverRay is offline
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Mike,
I know you guys had some real COLD weather down there so I understand. Here is what you need to do.
1. Make SURE the battery is good! IF it drops below 10.5V while cranking, no spark.
2. Check the kill switch, turn it off and on two or three times and try again.
3. Pull the tank and check the ground wires on the reg/rec. I usually undue the screw, clean any rust, put on a dab of anti-seize and tighten it down again.
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  #3  
Old 05-20-2018, 06:03 AM
TADracer TADracer is offline
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Thanks Ray. Battery is new but I never thought of the kill switch.
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79 XS-1100 Special

Once you un-can a can of worms, the only way to re-can them is with a bigger can.
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  #4  
Old 05-21-2018, 03:41 PM
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thumperjsa thumperjsa is offline
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Join Date: Apr 2004
Location: Coconut Creek, Florida
Posts: 500
If you're still running glass tubes for fuses, check for voltage across them when you turn the key on. Those old connections to the brass holders and the holders get weak over time. The main should be hot without the key if I recall correctly. I also can't recall if the main is part of the fuse box or a separate fuse connection on this model.

Another piece of advice, if you're still running glass tubes, I'd recommend swapping the fuse box for the more modern blade type. Even a non-electrician can do this as long as you can use a crimper or soldering iron.
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  #5  
Old Yesterday, 09:43 AM
Keithh Keithh is offline
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Join Date: Jun 2011
Location: Chesapeake, VA.
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No Ignition at all

Don't forget to clean ALL connectors - don't forget the ones behind the fuse panel!
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Current:
1979 XS11F - "Sigmund"
1975 Triumph T150V - "Ralph"
1975 Honda CB125S - "Blue" - built for my daughter to learn on.
1983 Kawasaki GPZ 550 - yet another bike that needs me! It followed me home...

Previous:
1975 Norton Commando
1969 Triumph Tiger 650
2002 Yamaha YZ250F
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  #6  
Old Yesterday, 07:57 PM
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TopCatGr58 TopCatGr58 is offline
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Hey Mike,

Okay, others have gotten you started. Don't forget the TCi connections/plugs. Also if you're running full OEM, the ballast resistor might also be a problem, but it's bypassed by the TCI during startup mode. When the BR goes bad, folks can usually get a starting pop, but once it starts, then it won't keep running once the TCI sends/routes power THRU the BR. Also, check the actual KEY switch, contacts can corrode there also, can be taken apart cleaned and reassembled.

Good Luck.
T.C.
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