A defining engineering milestone of the Yamaha FZ6 FAZER S2 (RJ149) is its Controlled Filling (CF) die-cast aluminum frame. Unlike traditional frames of the era that relied on multiple welds, Yamaha utilized a high-vacuum casting process to create a two-piece, bolt-together frame that was significantly lighter and more rigid, effectively utilizing the engine as a stressed member to mirror the handling characteristics of the YZF-R6 lineage.
| Component | Specification |
|---|---|
| Model Code | RJ149 (ABS Version) |
| Production Years | 2007 – 2010 |
| Engine Oil | SAE 10W-40, JASO MA (2.80L with filter) |
| Front Tire | 120/70 ZR 17 M/C (58W) |
| Rear Tire | 180/55 ZR 17 M/C (73W) |
| Spark Plug | NGK CR9EK (Gap: 0.6 – 0.7 mm) |
| Battery | GT12B-4 |
Engineering Evolution: The S2 Distinction
The RJ149 ‘S2’ (Spec 2) was not merely a facelift but a significant technical refinement of the original FZ6. It introduced a redesigned swingarm (hexagonal cross-section), upgraded monoblock-style front brake calipers (on ABS models), and a remapped ECU to smoothen the power delivery of the R6-derived inline-four engine. The inclusion of the Bosch ABS system specifically tuned for the RJ149 chassis added a layer of safety that made it a premier middleweight sport-touring choice.
Maintenance Essentials
Lubrication System
To maintain the high-revving nature of the 600cc powerplant, Yamaha specifies SAE 10W-40 engine oil meeting API Service SG or higher and JASO MA standards. Correct oil levels are critical:
- Periodic Change: 2.50 Liters
- With Filter Replacement: 2.80 Liters
- Dry Engine (Overhaul): 3.40 Liters
Ignition & Electrical
The S2 utilizes NGK CR9EK spark plugs. For optimal combustion efficiency, the electrode gap must be maintained between 0.6 and 0.7 mm. Electrical stability is managed by the GT12B-4 battery; given the ABS pump’s current draw, ensuring a healthy resting voltage is paramount for preventing system errors.
Chassis & Contact Patch
The RJ149 demands precise tire pressure management to maintain its neutral handling profile. The factory recommends 2.25 bar (33 psi) for the front tire. The rear pressure varies significantly based on load: 2.50 bar (36 psi) for solo riding (under 90kg) and 2.90 bar (42 psi) for pillion or heavy luggage scenarios.
Frequently Asked Questions
What type of oil filter does the FZ6 S2 use?
The FZ6 S2 typically uses a spin-on cartridge filter. It is highly recommended to replace the crush washer on the drain bolt at every oil change to prevent slow leaks.
How often should I check the spark plug gap?
While the service interval is usually every 12,000 km, checking the gap every 6,000 km ensures the R6-derived engine maintains its crisp throttle response and high-RPM stability.