Honda Ignition Coil - 30501-300-003 - CB350F/400F/500/550/750

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Reproduction Honda ignition coil. This coil replaces the stock style coil that came on many of Honda's SOHC CB's, it can be used on the left or right side. Use it with your points ignition or electronic ignition, it fits up just like the stock coils.

Sold individually. 2 are necessary for 4 cylinder models.


Spark plug wires are 17" long
Mounting holes are 102mm (4") apart. (measured from the center of each hole)
Low tension wires: 8" long - 1 male and 1 female bullet connector (power goes to the black/white line male terminal. points/condenser wire goes to the blue female terminal)
Primary Windings: 4.6 ohms +- 10% (just like the original coil)

Replaces Honda Part Numbers:

30510-333-013, 30520-333-013 (CB350F, CB400F)
30501-323-003, 30502-323-003 (CB500, CB550 up to '76)
30501-404-000, 30502-404-000 (CB550 '77-'78)
30501-300-003, 30502-300-003 (CB750)

Fits Honda:

CB350F Four - 1972-1974
CB400F Super Sport - 1975-1977
CB500K Four - 1971-1973
CB550F Super Sport - 1975-1977
CB550K Four - 1974-1978
CB750A Hondamatic - 1976-1978
CB750F Super Sport - 1975-1978
CB750K Four - 1969-1978

12 Reviews Hide Reviews Show Reviews

  • 5
    Flawless Fit

    Posted by Jeremy P on 30th Apr 2014

    I ordered a set of these for my cb 550 and had no problems what so ever for fitting or mounting. I have gone for a handful of rides already this season in all weather with these coils and still riding with no problems.

  • 5
    Replacement Coils for 73 Honda CB500K2

    Posted by Steve Hinkle on 21st Mar 2014

    I initially ordered new replacement coils from a different vendor - unfortunately, I received coils for a Suzuki or Kawasaki - they didn't fit the stock brackets. Contacted 4into1 from their Ebay ad who provided me with excellent service. Only had 1 coil in stock (I needed 2) - said they would re-order and let me know. They kept me informed on the order status and immediately sent me the parts once they got them. The parts fit the stock brackets as noted. The best thing is since I am actually getting some significant fire to the plugs now, it has never ran better! The parts guy I worked with was excellent and I will definately use them again and let my friends know about too.

  • 5
    High-quality product, fast delivery. Thank you 4 into 1

    Posted by Pierre-Yves Uhlmann on 13th Dec 2013

    High-quality product, fast delivery. Thank you 4 into 1