Mutant Buell Wiring Diagram

wiring diagramThis is the wiring diagram that I used to wire my Mutant, but it will work on pretty much any Harley evo engine as well. It’s pretty simple as you can see. Only 2 fuses and the spring-return ignition eliminates the need for a starter relay. Click on the image to view full size.

44 Comments so far

  1. steven burris on July 8th, 2008

    I need is book how build wiring chopper or custom sportster and buell. steven

  2. Pat Tucker on July 19th, 2008

    I love this diagram but I am staying with stock ign. module how does this figure in? help please!!!

  3. admin on July 19th, 2008

    No Problem. You’ll just need to add start button and a relay to the circuit.

  4. Gordy on October 12th, 2008

    I’d love to have a look at your wiring diagram but it doesn’t show up on the page for some reason…any chance someone could email it to me?

  5. John on October 17th, 2008

    Thanks this is what I have been looking for a simple way to wire My Bike just need a four way spring-return Ign switch.

  6. John on October 18th, 2008

    With this simple wiring diagram. Do you still have to use the stock ECM Module in the Wiring Scheme? Or will a Crane H-4 Ign do the job to get the fire where it needs to be with out it if at is all possible I want to do away with the ECM all to gather.

  7. admin on October 18th, 2008

    For sure John…I tossed the stock ignition went with a Crane Single Fire on mine.

  8. Clint on November 24th, 2008

    Right on with the diagram, if i am going to use a push button on the actual starter, where does the module come into play? or do i need to use it?

  9. Clint on November 24th, 2008

    oh and another…where did you get the switch?

  10. Clint on November 24th, 2008

    oh i see nm, i wouldnt have to use the button, its like a car ignition…still use the module though?

  11. Zach on December 21st, 2008

    What specific make of ignition did you use and why?
    Also, where did you get it?
    Thanks alot man.

  12. admin on December 22nd, 2008

    I can’t recall the exact make but any ignition with a spring return start (like a car)
    will work. You can find them on ebay . Make sure that the threaded mount
    is fairly short (3/4 in or less). You can also find spring loaded ignitions at boat marine supply stores.
    Using a spring loaded ignition removes the need for an ignition relay.
    Here’s a nice cheap one at the URL below

    Hope that helps

  13. papajoe on January 12th, 2009

    Need help/72 Sportster/already has starter relay/can you tell me what to change on your mutant wiring diagram/to wire in these stoack parts.. Thanks/papajoe

  14. admin on January 12th, 2009

    Hi Papa Joe
    The above drawing is for a spring loaded key start ignition (like a car), sounds like you’re wanting to use your stock ignition switch with a handlebar mounted start button.
    Rather than me confusing you by trying to explain it,check out the link below to an easy to follow diagram I found.

    Hope that helps.

  15. papajoe on January 13th, 2009

    Dan thanks for the past help/do you knoe where I can download a engine diagram for a 1972 Sportster/I have been on line for two days with no luck/Thanks/Joe

  16. clint on July 26th, 2009

    can anyone fix me up on simple wiring harness for a 1978 iron head chopper?

  17. clint on July 26th, 2009

    can anyone fix me up on simple wiring harness for a 1978 iron head chopper? email me at

  18. Austin on October 1st, 2009

    Sorry if this is a stupid question but i am new at this stuff. I have a 03 sportster motor that im useing on my chopper. If i use a H4 or a crane single fire how do i wire the ignition to the coil?

  19. PJ Carew on November 2nd, 2009

    I see the note “12 guage” for the hotwire to the battery–did you use 12 guage wire for all connections? (Except for the battery ground and cables, of course.)
    Many thanks,

  20. admin on November 2nd, 2009

    No, I used 14 gauge for everything else.

  21. Eddie the Mexican on January 14th, 2010

    I’m doing a led sled hardtail on my 2000 sporty with a 1200c to kind of do a bob/chop, can l used this diagram? and if so what would l do with the bank angle sensor and the voes switch?
    thanks for your help.

  22. Eddie the Mexican on January 14th, 2010

    sorry l forgot to tell you right now l’m running just the head light,tail light and a push botton start switch, but all the wiring and plugs for everything that l took off are still there.

  23. jw on January 18th, 2010

    thanx for simplified wiring diagram. for my state titling i need turn signal on bike for inspection. got a diagram with turn circuit

  24. tim on February 8th, 2010

    Just wondering, i love the diagram but it doesnt show any wiring for the ignition system from the nose cone to the ignition module

  25. john on February 16th, 2010

    Will h4 Crane duel fire Ing work with this system to? With a duel fire coil?

  26. admin on February 16th, 2010

    Sure, but I’d go with a single fire. The difference is night and day. Your bike will start in a flash, and you’ll get much better throttle response.

  27. jason on March 19th, 2010

    so i have a pan i put together on a rigid. i have dualfire coils. i was wanting to switch to your mutant. where does the solenoid figure in? and is singlefire really better than dual? if so, what mod would you run with it? I have a 88″ pan with a mallory distributor, double crane coils. Right now i can’t get the starter to work properly. All this relay and crap lol. i wanna get rid of it and make it as basic as possible

  28. jason on March 19th, 2010

    and also, is there a reason to run the ground for the headlight all the way back to the battery? i realize that grounding the starter to the battery reduces the friction in between which makes a more solid connection for amps to pass between the 2 but the headlight?

  29. jason on March 19th, 2010

    and i am sorry for all the questions lol but could the key act as the killswitch? is there a need for an ext kill switch? and you don’t show a ground from the starter to the battery, any reason why? my starter only has 2 terminals, one for the positive from the solenoid and one for a ground to the battery. I don’t know why my stuff won’t work lol. I have the relay and all so I am wanting to do away with it. key/switch, solenoid, starter is it possible to have just that? then have my brake and head lights on their own “circuit” and the coils on another? am I going about this wrong?

  30. B on May 9th, 2010

    Hi all is there anyone out there that can tell me how to wire up a crane hi-4 ignition to a dyna twin fire DC6-3 performance coil. It has no terminal just three wires from the coil pack. they are pink, white, and blue. The crane hi 4 has a white, black, green, brown, and red. Any help and suggestions will be greatly appreciated. thanks

  31. james on June 8th, 2010

    you said to add a start button and relay to the circuit to use the stock ignition module. could you tell me where that would be added to the circuit? thanks

  32. admin on June 9th, 2010

    I’ve made up a diagram for you.
    Have a look here:

  33. Johnny on June 12th, 2010

    Your simple wiring system works GREAT on my Ironhead bobber…I got all done and it ended up I got a shit key switch…it stuck in the “start” position and I almost burned up my starter!!!! Spend the money guys, buy a good quality switch…its worth it!!

  34. PJ on July 28th, 2010

    Dan – can I ground the headlight or do I need to run it all the way to the neg battery post (as you indicate in your diagram)?

    BTW – Your diagram is tops! I re-wired a mutant bobber I bought and your diagram helped me eliminate all the un-needed mess!

  35. admin on July 28th, 2010

    Glad I was able to help.
    You can ground to the headlight shell in most cases but it is better to run it back to the battery if possible.

  36. PJ on July 28th, 2010


  37. chris on August 31st, 2010

    can anyone show me a wiring diagram to the simplest on a 88 heritage soft tall. the plan is to have the lights on one circut and start on another with a 3 way toggle switch and push button start and also have the charging system working properly. really need help only means of transportation. need it on the road.

  38. chris on August 31st, 2010

    and what if you want to use a dual fire coil. all tho i know a single fire would be better.

  39. joey on September 1st, 2010

    I have used this wiring diagram on 4 seperate bobbers, its superb, thanks

  40. admin on September 1st, 2010

    Hey Joey
    Glad you found it useful. Love to see the pics of your bobbers.
    If you have a chance, send them to
    Thanks also for the feedback…rally appreciate it!

  41. booger on January 8th, 2011

    i am using a 98 buell s3t for my donor i like the simple wire diagram you have i just need something cleared up this is my first build so not sure if have it right i have to run a single fire ignition? or can i run the stock one. so in the case i have to run the single fire do i have to change the coils or can i run the stock ones


  42. admin on January 9th, 2011

    Hey Booger
    No you don’t have to run a single fire ignition. If you do, you will definitely need to use a single fire coil.

  43. booger on January 10th, 2011

    one other question do you have to wire the stock ignition module or do just have to wire the coil i didnt see it in the diagram

  44. Ken on May 15th, 2013

    I am just wondering if someone has a basic wiring for a custom chopper, It is single coil, with engine timing sensor and electronic engine module , 80 cubic inch evo

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