| Specification | Value |
|---|---|
| Production Years | 1982 – 1985 |
| Engine Type | Air-cooled, 4-stroke Inline-4 |
| Engine Oil | SAE 10W-40 (API SE/SF) – 3.2 L |
| Spark Plug | NGK DR8ES (Gap: 0.6–0.7 mm) |
| Tire Size (F/R) | 100/90-19 / 120/90-18 |
| Battery Type | YB14L-A2 |
A unique engineering highlight of the Kawasaki Z 750 GT (KZ750E-P) was its transition to a shaft-drive system, a rarity for middleweight inline-fours of the early 1980s. While its siblings in the ‘Z’ family were focused on raw superbike performance, the GT was precision-engineered for the European touring market, offering a low-maintenance final drive that significantly reduced the mechanical fatigue associated with long-distance high-speed cruising.
Technical Engineering Overview
The KZ750E-P is powered by Kawasaki’s legendary air-cooled 738cc DOHC engine. Unlike the more aggressive GPz models, the GT variant was tuned for a broader torque curve, making it exceptionally smooth for two-up riding. The frame was reinforced to handle the lateral forces of the shaft drive, resulting in a stable, albeit slightly heavier, chassis compared to the chain-driven KZ750E.
Maintenance Guide & Essentials
Lubrication System
To maintain the longevity of the air-cooled top end, use SAE 10W-40 oil. It is critical that the oil meets API SE or SF standards to ensure compatibility with the internal seals and clutch materials of the era. The total capacity is 3.2 Liters.
Ignition & Electrical
Reliable combustion is achieved via NGK DR8ES spark plugs. For optimal throttle response and cold-start performance, the gap must be set precisely between 0.6 and 0.7 mm. The electrical system relies on the YB14L-A2 battery, which provides the necessary cold cranking amps for the high-compression inline-four.
Chassis & Tires
The GT utilizes a 19-inch front wheel for superior tracking and an 18-inch rear. Proper inflation is vital for handling stability: 2.0 bar (28 psi) in the front and 2.25 bar (32 psi) in the rear. Over-inflation can lead to harsh feedback through the air-assisted front forks, while under-inflation will compromise the shaft-drive’s cornering characteristics.
Expert Verdict
The Kawasaki Z 750 GT remains a testament to over-engineered Japanese reliability. It bridges the gap between the classic ‘Universal Japanese Motorcycle’ (UJM) and the modern sport-tourer. For collectors and enthusiasts, its mechanical simplicity and robust shaft drive make it one of the most practical vintage motorcycles to maintain today.
Frequently Asked Questions
Q: How often should the shaft drive oil be changed?
A: While the engine oil is changed frequently, the final drive gear oil should be inspected every 5,000 km and replaced every 20,000 km using a high-quality GL-5 gear lubricant.
Q: Can I use modern synthetic oil?
A: While possible, ensure the synthetic oil does not contain friction modifiers that could cause the wet clutch to slip. A dedicated motorcycle 10W-40 is always preferred.