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Discussion Starter · #1 ·
I had a weak coil on one side bike would start on one cylinder and If I pulled the plug wire part way off the cylinder would start hitting after it warmed up a little it would run ok but kind of a poor way to start your bike :D , decided to put on a set of mikesXS 650 coils
http://www.mikesxs.net/ but after reading about the plumbing clamps to hold them on and all that decided to do this......pics...
now the bike kicks off on both cylinders on start up..... first thing was to move the Condenser pack to the center.... then make some plates out of 1" strap aluminum..... plenty of room under the tank and the horn and switch all bolt in proper posistion
 

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Discussion Starter · #4 ·
tbpmusic said:
:D :D what's that about great minds thinking alike? those washers seemed to have worked ok where did you mount your condensers? hopefully this will even out my plug colors :lol: run them a while and when it starts running crappy put the dark plug in the light side (switch plugs side to side) and then it would run good (cleaning one plug while slowly fouling the second) until it's time to switch them again
 

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jayel said:
......where did you mount your condensers? ......
I just screwed them to the frame, just aft of the coils.
I ran a heavy separate ground wire to coils/condensor/key switch/handlebar clamp/battery.
 

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Discussion Starter · #6 ·
tbpmusic said:
jayel said:
......where did you mount your condensers? ......
I ran a heavy separate ground wire to coils/condensor/key switch/handlebar clamp/battery.
Dang! need to take the tank off again to do that! I'd mount it with explosive bolts if it used any bolts :lol: yeah a separate ground wire would be better than relying on the frame as ground
 

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Sensei
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Coil positive to Honda black/white wire, coil negative to point and condenser....
If you are asking how to tell which is which, set meter to ohms.... Put one probe in the end of spark plug wire (Bare wire, NOT the plug boot) ...Read to both primary side wires individually.... LOWER reading will be on the positive (common ) wire as you will only be reading one winding (albeit the larger one).....LOWEST reading would be across the primary winding itself (brown to orange on the Yammie coil)..... HIGHEST would be across both windings (secondary negative to primary negative)
 

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Sensei
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I don't remember.... Bust out your ohmmeter ...... But if it's not firing either way, something else is wrong..... "Kill switch"?..... Do you have 12V to the black/white coil feed wire?...
You are using TWO separate coils right?... the dual output 650 coil is wired differently internally (pix available if needed)
 

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im working with three different coils and im to the point were im saying all of them are garbage so im just going to suck it up and save for a new set so much for the toy run.
 

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Sensei
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Due to recent coil related problems, I drew this up ....
Plug will spark as the "touch and remove" wires are separated if everything is good....
Honda typical color codes shown (yellow could be blue wire as well)

 

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( I learned everything I really needed to know in Kindergarten...)
Girls are different... (self explanitory)
"Cutting and pasting" allows me to make gaskets......
"Coloring" allows me to make pictorial representations for those that either
don't listen and follow directions, or can't understand or follow the written instructions,
"Playground Rules" mean you can take your ball and go home...
 

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I know this thread has long since been active, but could anybody post a picture of how they wired their coils to the harness? I'm not able to get a spark when I ground the spark plug to the engine and try to start it.

Also, 66Sprint - are you saying in order for the XS coils to work, you need to use two of the same coil?
 

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Sensei
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Yes, you need two single output coils, one for each side/sparkplug/set of points.......
A single, dual output coil will not work on the "Type I" ignition of most of the DOHC 450 twins.......

Wiring is as such, the other coil (yellow point wire) is just a mirror image of this one, and connects to the three wires that end on the right edge (where the drawing was cropped) color to color...
 

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The colors aren't the same on my coils, but to test which is positive all I need to do is put multimeter to Ohms and put one probe on bare spark plug wire, and other probe to one of the wires that sticks out of the coil? The wire that has the lowest reading is the positive, right?

How would I attach a ground wire to the coil? Just run a wire to the negative terminal of my batter to the negative wire stemming from the coil? Forgive the stupid questions... I am not at all familiar with electrical.
 
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