fiedler.casey
Active Member
Let's get right to it...
1) What gauge wire should I run to the primary winding of the coils with a 4.2 Ohm resistance?
2) From what part of the wiring harness should I run a wire to the coils? I currently have it: battery -> fuse -> kill switch -> coils/breakers.
3) I am getting 4.2 Ohms of resistance on the primary windings of both coils (CB360T but I believe the coils are from another bike put on by a PO) and 13,500 Ohms in the secondary windings of the left coil. The right coil, however, is giving me either wildly varying resistances or, on occasion, will settle down somewhere around 500,000 Ohms for the secondary windings. 4.2 and 13,500 seem like reasonable coil resistances, half a million does not. Is there another way to test the secondary windings of this coil? Both cylinders had spark last time the bike ran, but I'm suspicious that the coil may be on its way out.
4) My horn (aftermarket) pulls 4 Amps, this strikes me as unusually high but I haven't run around testing resistances on various motorcycle horns so I really have no frame of reference. Is this within reasonable margins of operation for a "high power" horn? With a 4 amp draw I feel I should run it through a relay instead of directly through the momentary switch on the bars. Is this advisable?
5) I cut out the old incandescent bulb from the headlight (high was burnt out) with a dremel and resized the hole to fit a standard H4 bulb which I plan to epoxy in place with some high temp epoxy. Which direction should I orient the new bulb? My instinct is to put it in with the "shield" for the low beam on the down side so that reflected light then bounces off the top of the concave mirror inside the headlight housing and reflects downward at the road for a lower angle and less intense light. Is this correct or am I off by 180 degrees?
To answer some questions, the wiring harness on this bike is being completely rebuilt from the ground up (by yours truly) so I'm not trying to rig things into the old harness, I have the luxury of doing pretty much whatever I want wiring wise.
1) What gauge wire should I run to the primary winding of the coils with a 4.2 Ohm resistance?
- At 4.2 Ohms on the primary windings and 12V that's 3.07 Amps... according to http://www.solar-wind.co.uk/cable-sizing-DC-cables.html (allowing for 1m of cable) that means a 21AWG wire would be sufficient. Am I correct?
2) From what part of the wiring harness should I run a wire to the coils? I currently have it: battery -> fuse -> kill switch -> coils/breakers.
3) I am getting 4.2 Ohms of resistance on the primary windings of both coils (CB360T but I believe the coils are from another bike put on by a PO) and 13,500 Ohms in the secondary windings of the left coil. The right coil, however, is giving me either wildly varying resistances or, on occasion, will settle down somewhere around 500,000 Ohms for the secondary windings. 4.2 and 13,500 seem like reasonable coil resistances, half a million does not. Is there another way to test the secondary windings of this coil? Both cylinders had spark last time the bike ran, but I'm suspicious that the coil may be on its way out.
4) My horn (aftermarket) pulls 4 Amps, this strikes me as unusually high but I haven't run around testing resistances on various motorcycle horns so I really have no frame of reference. Is this within reasonable margins of operation for a "high power" horn? With a 4 amp draw I feel I should run it through a relay instead of directly through the momentary switch on the bars. Is this advisable?
5) I cut out the old incandescent bulb from the headlight (high was burnt out) with a dremel and resized the hole to fit a standard H4 bulb which I plan to epoxy in place with some high temp epoxy. Which direction should I orient the new bulb? My instinct is to put it in with the "shield" for the low beam on the down side so that reflected light then bounces off the top of the concave mirror inside the headlight housing and reflects downward at the road for a lower angle and less intense light. Is this correct or am I off by 180 degrees?
To answer some questions, the wiring harness on this bike is being completely rebuilt from the ground up (by yours truly) so I'm not trying to rig things into the old harness, I have the luxury of doing pretty much whatever I want wiring wise.
