Hi friends,
After finishing some educational pursuits that have kept me from my bikes, I find myself with more time. So I put it to use and got all of my bikes running, which now include: 71 CL350, 74 TC125, 78 XL350, 79 XS11, and an 82 XL500.
I am just now getting back to my 79sf. I sold the 80g months ago. Sad to let her go, she looked so nice. But my 79sf has promise. The 79 is more nimble and more powerful.
Anyway, I have a few electrical gremlins. All the bikes I get come with them. Here's the description:
When I got the bike, the headlight would not come on and the oil pressure / brake tail light was always indicating, and I had no tachometer function. After some cursory testing (little to no time available), I patched a 12v wire into the Blue/Black wire leading to the reserve lighting device and had a functioning headlight.
Well, I want to figure out what the real problem is now that I have some more time. I have a Clymer 78-79 XS11 Fours book that kinda sucks for testing information. Between it and my 80's Yamaha manual I think I may have a faulty headlight relay. I am not sure, though. I don't have any voltage at any time at the Blue/Black wire feeding/coming from the relay. The other wires test OK for voltage. I'd like this to be as simple as replacing the relay. What do you guys think?
I have tested the tachometer and have determined it is getting voltage from the battery and from the alternator, and the manual says I have a faulty tach if I have the various voltages. Does anyone have a 79sf (working) tach? I could trade for an 80g tach.
Also, I'm not sure why the oil/brake tail indicator bulb intermittently indicates. I have checked the oil and I don't have any reason to believe the bike is starving for oil. Is the oil pressure switch mounted beneath the carbs? Perhaps I have an intermittent short in that wire or in the brake light circuit?
Finally, I need a front brake switch. Any ideas?
Thanks in advance.
Ben
After finishing some educational pursuits that have kept me from my bikes, I find myself with more time. So I put it to use and got all of my bikes running, which now include: 71 CL350, 74 TC125, 78 XL350, 79 XS11, and an 82 XL500.
I am just now getting back to my 79sf. I sold the 80g months ago. Sad to let her go, she looked so nice. But my 79sf has promise. The 79 is more nimble and more powerful.
Anyway, I have a few electrical gremlins. All the bikes I get come with them. Here's the description:
When I got the bike, the headlight would not come on and the oil pressure / brake tail light was always indicating, and I had no tachometer function. After some cursory testing (little to no time available), I patched a 12v wire into the Blue/Black wire leading to the reserve lighting device and had a functioning headlight.
Well, I want to figure out what the real problem is now that I have some more time. I have a Clymer 78-79 XS11 Fours book that kinda sucks for testing information. Between it and my 80's Yamaha manual I think I may have a faulty headlight relay. I am not sure, though. I don't have any voltage at any time at the Blue/Black wire feeding/coming from the relay. The other wires test OK for voltage. I'd like this to be as simple as replacing the relay. What do you guys think?
I have tested the tachometer and have determined it is getting voltage from the battery and from the alternator, and the manual says I have a faulty tach if I have the various voltages. Does anyone have a 79sf (working) tach? I could trade for an 80g tach.
Also, I'm not sure why the oil/brake tail indicator bulb intermittently indicates. I have checked the oil and I don't have any reason to believe the bike is starving for oil. Is the oil pressure switch mounted beneath the carbs? Perhaps I have an intermittent short in that wire or in the brake light circuit?
Finally, I need a front brake switch. Any ideas?
Thanks in advance.
Ben
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