| Technical Parameter | Specification |
|---|---|
| Production Years | 1994 – 1995 |
| Engine Oil | SAE 10W-40 (API SF or SG) – 2.1 Liters |
| Front Tire | 90/90-21 54S |
| Rear Tire | 120/90-17 64S |
| Spark Plugs | 2x NGK DPR9EA-9 |
| Battery | YTX14-BS |
| Tire Pressure (Front) | 1.5 bar (22 psi) |
| Tire Pressure (Rear) | 1.75 bar (Solo) / 2.0 bar (Dual) |
The Suzuki DR 650 RE/REU (Internal code: SP45B) occupies a unique space in dual-sport history. Unlike its kick-start predecessors, the SP45B was one of the first iterations to fully commit to the electric-start era while retaining the robust frame-mounted fairing and the massive 17-liter fuel tank. It represents the final engineering peak of the first-generation DR650 architecture before the radical weight-reduction redesign of 1996.
Engineering Highlight: The SACS Advantage
At the heart of the SP45B is the 641cc single-cylinder engine featuring the Suzuki Advanced Cooling System (SACS). Borrowed from the high-performance GSX-R line, this system uses high-volume oil jets to cool the cylinder head and piston. This engineering choice allowed the DR650 to maintain reliability during long-distance highway travel and slow-speed technical trails, where traditional air-cooling often falters.
Maintenance & Technical Requirements
To maintain peak performance, the SP45B requires specific attention to its lubrication and electrical systems. The engine utilizes a dual-plug cylinder head (2x NGK DPR9EA-9), which ensures more complete combustion and smoother idling—a critical factor for a large-bore single.
- Oil Service: Use a high-quality SAE 10W-40 oil meeting API SF or SG standards. The total capacity is 2.1 liters. Given the SACS reliance on oil for cooling, regular intervals are mandatory.
- Electrical System: The transition to electric-only starting makes the battery health paramount. The SP45B utilizes a 12V 12Ah YTX14-BS battery.
- Chassis & Handling: The 21-inch front and 17-inch rear wheel combination provides a stable platform. For optimal tire longevity and grip, maintain 1.5 bar in the front. The rear varies significantly based on load: 1.75 bar for solo excursions and 2.0 bar when carrying luggage or a passenger.
MotoSpecsLab Editorial Verdict
The SP45B is often overlooked in favor of the lighter ‘SE’ models, but for the touring-oriented dual-sport enthusiast, it is arguably the superior machine. Its wind protection and fuel range make it a formidable trans-continental tool. From a mechanical perspective, it is a masterclass in ‘over-engineering,’ built during an era when Suzuki prioritized durability over extreme weight savings.
Frequently Asked Questions
Q: How many spark plugs does the SP45B require?
A: It requires two NGK DPR9EA-9 spark plugs for its dual-ignition system.
Q: Is the SP45B suitable for modern highway speeds?
A: Yes, the frame-mounted fairing and SACS cooling make it more capable of sustained 110-120 km/h speeds than many of its contemporaries.