Ultima SHOVELHEAD ENGINES Specifications download pdf (Page 11)

Ignition Systems

Ultima

Shovelhead engines come with an Ultima Fixed Curve Single Fire Ignition System (by Dynatek) with advance Curves and the Rev

Limiter preset from the factory and do not require further adjustment. Rev limiter is set at 6,000 RPM. Modifying or tampering with the

ignition settings during the engines warranty period will result in your warranty being void.

Ultima® Shovelheads utilize a dual plug design to prevent detonation, overheating, spark plug fouling and hard starting. Additional

horsepower and increased gas mileage are also benefits of the dual plug design.

It is recommended, yet not required, to run both plugs per head. If you choose to run dual plugs please refer to dual plug wiring diagram on

the next page.

• INSTALLATION NOTES

**IMPORTANT** Coil primary resistance must be in the range of 2.5 to 3.5 ohms.

**IMPORTANT** Carbon, graphite or spiral core type suppression spark plug wires are required.

Do not use metal core wires. Ultima

high performance spark plug wires w/300 ohms of resistance per foot produce

the best results when using an Ultima

ignition system.

**IMPORTANT** This Ultima Ignition requires the gold colored timing rotor used on 1983 and later EVO

motors (Midwest part no. 53-14).

The earlier silver colored cup will not work properly. Bikes originally equipped with points (except distributors) or early

electronic ignition will accept the later model cup without modification.

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Ultima SHOVELHEAD ENGINES Specifications Page 11