Question about Honda CB 750 Nighthawk Motorcycles

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'82 honda cb 750 sc. Runs ok when it's cold, then after it gets hot it seems to only be running on 2 cylinders. Ideas?

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More than likely one of the two ignition coils is bad. It is common for coils with broken internal wires to work fine when cold, but fail when the windings heat up and expand. To prove this, switch the coil outputs and see if the original "bad" cylinders are now "good" when hot. You will still experience the same problem (the original "good" coils will now be "bad" when hot), but you will have isolated the problem.

Posted on Jul 21, 2009

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For more information about your issue and valuable "Free" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
http://www.fireblades.org/forums/honda-cruisers/81620-91-nighthawk-750-fuel-problem.html
77 CB750 only runs with choke won take any throttle
Honda CB750f2 Manual
http://www.partsfish.com/page/oem-parts-for-honda
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Possibilities are>
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Can I get a “very helpful” rating on this answer?

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