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  • 1972-77 Honda CB350F / CB400F Dynatek Dyna S Ignition System
Dynatek ignition system brand detail for Honda CB builds
Dynatek ignition system brand detail for Honda CB builds
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60-day returnsEligible unused parts Free ground shippingUSA & Canada over $50
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Dynatek ignition system brand detail for Honda CB builds

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Load image into Gallery viewer, Dynatek ignition system brand detail for Honda CB builds
5.0 ( 1 review)

1972-77 Honda CB350F / CB400F Dynatek Dyna S Ignition System

07-9985
$369.95 USD
In stock Usually ships the same or next business day
Check model fitment View fitment
Questions about this part? Contact us 4.8/5 1,347 store reviews
Secure checkoutProtected payment
60-day returnsEligible unused parts Free ground shippingUSA & Canada over $50
Browse all parts

1 product reviews

1972-77 Honda CB350F / CB400F Dynatek Dyna S Ignition System

1972-77 Honda CB350F / CB400F Dynatek Dyna S Ignition System
$369.95 USD
Description

Start with the Dyna S ignition module only for your CB350F or CB400F Supersport. This is the base ignition unit without added coils or wires, for riders who already have compatible 3 Ohm or higher coils and just need the ignition upgrade.

The Dyna S is a self-contained electronic ignition built with state-of-the-art engineering, the same system used by top racers for over two decades. Housed behind the ignition cover with a magnetic rotor and the original spark advancer, it preserves the factory advance curve while increasing power, reducing vibration, backfiring, and intake reversion, especially on engines with radical cam timing. Front and rear cylinder timing adjust individually. Made in the USA.

Requires coils 3 Ohm or higher. Includes instructions and a one-year Dynatek warranty.

Key Features
• Dyna S electronic ignition module only
• Requires 3 Ohm or higher coils (not included)
• Magnetic rotor preserves factory advance curve
• Individual front/rear cylinder timing
• Made in the USA
• Instructions and 1-year warranty included

Fitment / Compatibility
• Honda CB350F (1972‑74) Supersport
• CB400F (1975‑77) Supersport

Part Number: 07-9985

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Check the listed model and year, then read any fitment notes in the description.

Make Model Year
Honda CB400F 1975
Honda CB400F 1976
Honda CB400F 1977
Honda CB350F0 1972
Honda CB350F0 1973
Honda CB350F1 1974

Free ground shipping over $50

To the USA & Canada. In-stock orders usually ship from our own warehouse the same or next business day.

Estimated ground delivery after your order ships
DestinationDelivery time
USA4–7 business days
Canada2–6 business days

Ground shipping includes tracking, emailed when your order ships. Need it sooner? Express options are available at checkout.

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60-day returns on eligible parts

No restocking fees. Eligible parts must be unused, uninstalled, unaltered and complete. The 60-day window starts when your order is delivered.

Electrical parts are excluded from standard returns. Check return eligibility.

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Other shipping options

Canada Post Economy: Available at checkout for select small items. Allow 1–3 weeks for delivery. No tracking or insurance is included.

Outside the USA & Canada: Delivery times vary by destination and shipping method. Buyers are responsible for applicable duties, taxes and import fees. We cannot mark orders as gifts.

Frequently Asked Questions

What does Dyna S ignition 07-9985 replace on a CB350F or CB400F?

The Dyna S replaces the complete breaker-points plate assembly and mounts in the original location. It uses its magnetic rotor with the motorcycle's original mechanical spark advancer, retaining the factory advance mechanism.

Are ignition coils and spark-plug wires included with Dyna S 07-9985?

No. This is the Dyna S ignition system and instructions only. It is designed to operate with the stock coil arrangement or aftermarket coils having at least 3 ohms of primary resistance.

Can bare 1.5-ohm coils be connected directly to the Dyna S?

No. Dynatek specifies at least 3 ohms primary resistance for aftermarket coils. If a stock system uses 1.5-ohm coils with a 1.5-ohm ballast resistor, keep the complete stock coil-and-ballast arrangement within factory specification rather than bypassing the resistor.

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