where are the 2 coils located on a 1981 honda 750cb

[19smitty50]

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[sgtslag]

Check the FSM on this site's homepage, but they should be underneath the gas tank -- remove it, and you will see them on either side of the frame tube.

[19smitty50]

thank you. can you tell me the availability of the coils.  this shop has had my bike for a month today saying it was hard to find the part

On Mon, Mar 7, 2011 at 10:24 PM, sgtslag [via Honda CB750'S] <[hidden email]> wrote:

Check the FSM on this site's homepage, but they should be underneath the gas tank -- remove it, and you will see them on either side of the frame tube.

1979 CB750K
1983 Kawasaki 440 LTD
1993 Kawasaki Voyager XII

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[lcochran]

z1enterprises.com has parts for nearly all the honda's.

Here is the link your to bikes homepage
http://www.z1enterprises.com/catalog.aspx?pid=CB750C-1981

Good luck.

[sgtslag]

BikeBandit has them:

http://www.bikebandit.com/houseofmotorcycles/1981-honda-cb750k/o/m2003#sch34961

If you can locate a dual-output automotive coil, with the correct input resistance (sorry, not sure what it should be, but check the FSM...), that would work as well.  The coil is a simple electrical device.  As long as it amplifies the voltage high enough (20kV+), it will work; because of the electronic ignition system, you need a coil with the correct input resistance/impedance, or you will overload the ignition system's output, causing it to burn out.

The automotive coils are said to be superior in durability, and much less expensive than M/C coils (typically in the $120+ range, per coil!).  I have looked into this upgrade, but I have not had a need to do it, yet.  If your coils are bad, look into it further, as you may not only improve performance considerably, but you may save money at the same time.

Another reason for the 'upgrade' to automotive coils, is that they deliver more energy to the plugs, allegedly.  This can also be achieved by: 1) using Iridium Spark Plugs [more expensive, last considerably longer, fire much more easily, and consistently -- amazing performance improvement in starting, my bike is running almost instantly, before I can begin to remove my thumb from the starter button, even after 5,000 miles!]; 2) wire your coils through a relay switch to the ignition system, but connect the coils directly to the battery for increased voltage and power to the coil, and to the plugs; 3) install new wires and caps.

Good luck!  Cheers!