NGK Standard Spark Plug
AB-6
$8.99
Sale price
$8.99
Regular price
$8.99
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NGK Standard Spark Plug for Harley-Davidson Z90 Motorcycle - Street
NGK Standard Spark Plug for Harley-Davidson Z90 Motorcycle - Street
$8.99
Sale price
$8.99
Regular price
$8.99
SKU:38-2245
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Description
Standard Spark Plug
The workhorse, at the heart of smooth-running engines around the world.
FEATURES
- OEM Quality
- Triple-Gasket Sealing Process
- Consistent Performance
- Plug of Choice in Millions of Vehicles
- Sold each
Technical Specifications
- MFG. Part Number AB-6
Vehicle Information
Harley-Davidson Z90 Motorcycle - Street (1973-1975)
The Harley-Davidson Z90, produced from 1973 to 1975, was a versatile motorcycle designed for both street and trail riding. Manufactured by Aermacchi in Italy for Harley-Davidson, it featured a robust 90cc (90.43 cubic centimeters) two-stroke, single-cylinder, air-cooled engine. This engine was paired with a 4-speed manual transmission and utilized an oil injection system, eliminating the need for pre-mixing fuel and oil. Throughout its production run from 1973 to 1975, the Harley-Davidson Z90 maintained a consistent design. There were no mid-cycle generation changes, significant engine alterations, or additional trim levels introduced. The Z90 was offered exclusively as a single "Base" model, ensuring uniformity across all model years within this period. Q: How do I know if this part fits my Z90?
A: Please use the year and model selector at the top of the page to confirm compatibility.
Maintenance
| Component | Interval | Details |
| Spark Plug | Inspect every 1,600 to 3,200 km or annually; replace as needed | More frequent inspection and replacement may be necessary due to potential carbon fouling typical of two-stroke engines. |
| Air Filter | Inspect and service (clean or replace) every 8,000 to 16,000 km | More often if the motorcycle is operated in dusty or off-road conditions. The type of filter (paper, foam, or cotton gauze) determines if it can be cleaned and re-oiled or if it requires replacement. |
| Drive Chain | Clean and lubricate every 800 km or more frequently; inspect for tension and wear | More often if ridden in wet or dirty conditions. |
Maintenance intervals are based on vehicle specifications and general practices for vintage two-stroke motorcycles. It is recommended to consult the official owner's manual for precise information.