Bob Wegman
XS650 Enthusiast
It is located an my 77 XS650D. Below the coils and behind the horn. I am thinking it may be a resistor but not sure.
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What is this part?
- Thread starter Bob Wegman
- Start date
oldncnile
XS650 Enthusiast
Points condenser?
Bob Wegman
XS650 Enthusiast
No, the condensers are in the center of the upper engine mount. This part has two wires exiting it. One wire is a yellow one and the other is a yellow with a black (I believe) chaser.
Your clue is the yellow/black...
Yes, it's a resistor. Diagram doesn't say what it's for, but the Y/B wire goes to the hi/low headlight switch. If I'm not mistaken, '77 was the first year of the reserve lighting system. I suspect the resistor is there to give reduced power to the hi beam if (when) the low beam burns out. I know on later bikes that's all contained in the RLU, but perhaps Yamaha used an external resistor on the '77?
Yes, it's a resistor. Diagram doesn't say what it's for, but the Y/B wire goes to the hi/low headlight switch. If I'm not mistaken, '77 was the first year of the reserve lighting system. I suspect the resistor is there to give reduced power to the hi beam if (when) the low beam burns out. I know on later bikes that's all contained in the RLU, but perhaps Yamaha used an external resistor on the '77?
Bob Wegman
XS650 Enthusiast
The diagram is from our Tech section. Here's the original from there, without the marks.
Ha! I had to go look, I posed the same question on my ‘77 build,
Daniel Black replied,
“Yup, I'm sure you've now seen in the diagram that it is the resistor for the Reserve Lighting Unit.
The RLU is supposed to monitor your headlight and if either the high or low beam blowout, switch over to the other filament. “
Daniel Black replied,
“Yup, I'm sure you've now seen in the diagram that it is the resistor for the Reserve Lighting Unit.
The RLU is supposed to monitor your headlight and if either the high or low beam blowout, switch over to the other filament. “