| Component | Specification |
|---|---|
| Engine Oil | SAE 10W-40 (API SE, SF, SG) | 2.5L (w/ Filter) |
| Tires (F/R) | 110/80 V18 / 150/70 V17 |
| Tire Pressure (F/R) | 2.25 bar / 2.5-2.8 bar |
| Spark Plug | NGK DPR8EA-9 (0.8 – 0.9 mm gap) |
| Battery | YB16B-A1 |
The Suzuki VX 800 remains a unique anomaly in motorcycling history. Unlike many Japanese standard bikes of the 1990s, the VX 800 was largely the brainchild of Suzuki’s U.S. design studio in California. Lead designer Sam Tanushige envisioned a machine that combined the low-maintenance shaft drive and torque of the Intruder 750/800 cruiser with a standard, almost European-style chassis, creating one of the first true “factory streetfighters” before the term was even popularized.
Technical Review: Engineering and Performance
At the heart of the VS51B is the liquid-cooled, 45-degree V-twin. By 1996, this powerplant had been refined for better mid-range response. The engine produces approximately 63 horsepower, but its true character lies in the 73 Nm of torque available low in the rev range. The long wheelbase (1555mm) provides exceptional high-speed stability, though it sacrifices some flickability in tight technical corners.
The shaft drive system is a standout feature for long-distance commuters, significantly reducing maintenance compared to chain-driven rivals. However, riders should be aware of the “shaft effect”—the tendency of the rear suspension to rise under hard acceleration—a characteristic common to bikes of this era.
Maintenance Guide
Lubrication System
For the VS51B/96, Suzuki specifies SAE 10W-40 oil meeting API service classifications SE, SF, or SG.
- Oil Change: 2.4 Liters
- With Filter Change: 2.5 Liters
- Dry Engine Fill: 3.2 Liters
We recommend high-quality semi-synthetic fluids to protect the integrated gearbox and wet clutch system.
Tires and Handling
The VX 800 uses a somewhat unique 18-inch front and 17-inch rear combination. To maintain the intended handling characteristics, stick to the 110/80 V18 (Front) and 150/70 V17 (Rear) sizing.
Pressure Settings:
- Front: 2.25 bar (33 psi)
- Rear (Solo): 2.5 bar (36 psi)
- Rear (Dual/Loaded): 2.8 bar (41 psi)
Ignition and Electrical
The electrical system relies on the YB16B-A1 lead-acid battery. Given the V-twin’s high compression, a healthy battery is critical for cold starts. Ensure your NGK DPR8EA-9 spark plugs are gapped precisely between 0.8 and 0.9 mm. Fouled plugs on the rear cylinder are a common symptom of rich low-speed fueling; ensure your carburetors are balanced annually.
Frequently Asked Questions (FAQ)
Q: How often should I change the shaft drive oil?
A: While not listed in the quick specs, the final drive gear oil should typically be inspected every 6,000 miles and replaced every 12,000 miles using SAE 90 hypoid gear oil.
Q: Why is my VX 800 difficult to start after sitting?
A: This model often suffers from vacuum-operated fuel petcock issues or gummed-up pilot jets in the Mikuni carburetors. Ensure the fuel is fresh and the battery voltage is above 12.6V.