| Category | Specification |
|---|---|
| Model Designation | Suzuki VX 800 (VS51B) |
| Production Years | 1990 – 1997 |
| Engine | 805cc V-twin, SOHC, 8-valve |
| Oil Capacity | 2.8 L (SAE 10W-40 API SF/SG) |
| Spark Plug | NGK DPR8EA-9 |
| Final Drive | Shaft Drive |
The Suzuki VX 800 (VS51B) stands as a unique chapter in motorcycle history, being one of the few machines designed primarily at Suzuki’s U.S. design studio in California. Conceived by lead designer Sam Tanushige, the VX 800 was a bold experiment: transplanting the torque-rich V-twin heart of the Intruder 750/800 cruiser into a long-wheelbase, sport-touring chassis with a maintenance-free shaft drive.
Technical Engineering Deep-Dive
At the core of the VS51B is the 45-degree V-twin. Unlike the high-revving inline-fours of its era, the VX 800 emphasizes low-to-midrange torque, delivering a rhythmic and mechanical riding experience. The engine features liquid cooling and a staggered crankpin design to reduce vibrations, which is critical for long-distance touring comfort. The shaft drive, inherited from the Intruder line, makes it an exceptionally low-maintenance choice for commuters and world travelers alike.
Maintenance Guide & Fluid Specifications
To maintain the longevity of the VS51B, adherence to specific fluid and component standards is non-negotiable for MotoSpecsLab enthusiasts.
Lubrication and Ignition
The engine requires 2.8 liters of SAE 10W-40 motor oil. Given the era of the engine design, an API SF or SG rating is recommended. For the ignition system, the VX 800 utilizes NGK DPR8EA-9 spark plugs, which should be gapped correctly to ensure efficient combustion across both cylinders.
Tires and Chassis
The VX 800 utilizes a specific tire combination to balance its 1,555mm wheelbase. The front requires a 110/80-18 58V, while the rear takes a 150/70-17 69V. Proper inflation is vital for handling stability:
- Front: 2.25 bar (33 psi)
- Rear (Solo): 2.50 bar (36 psi)
- Rear (Dual/Loaded): 2.80 bar (41 psi)
Electrical System
The electrical load is managed by a YB16B-A1 battery. Given the V-twin’s high compression, a healthy battery is essential for reliable starting, especially in colder climates where the thick oil can resist initial cranking.
The MotoSpecsLab Verdict
The Suzuki VX 800 (VS51B) is a machine of understated competence. While it never achieved mainstream stardom, its combination of a cruiser’s soul and a tourer’s practicality has earned it a dedicated cult following. For the modern owner, regular oil changes and maintaining correct tire pressures are the keys to preserving this unique piece of 1990s engineering.
Frequently Asked Questions
Q: What is the best oil for the Suzuki VX 800?
A: We recommend a high-quality 10W-40 mineral or semi-synthetic oil meeting API SF or SG standards.
Q: How often should I check the shaft drive?
A: While the shaft drive is low maintenance, the final gear oil should be inspected every 12,000 km and replaced if contaminated.