By NastyNils·
Motorcycle comparison · Naked Bike
Yamaha FZ6 (RJ14) vs Suzuki SV650 (WVBY)
Yamaha FZ6 vs Suzuki SV650: no fairing, no excuses. Here's how to pick.
You'll feel the swap at the throttle, where the Yamaha FZ6's engine asks for little beyond routine servicing. The Suzuki SV650's twin pulls clean from barely above idle.
So which one do you buy?
The SV650 has the edge if…
Daily commuting & city riding
A touch ahead: SV650
Day in, day out, the SV650 nudges ahead in traffic. It isn't a big enough gap to plan around.
Sporty riding on twisty roads
Nose ahead: SV650
In the twisties, the SV650 asks a bit less of you to go quickly. Call it a modest edge.
What makes each one tick
FZ6
Up near 12,000 rpm, the FZ6's inline-four finds the rush it's been saving, yet it trickles through a daily commute without fuss. Its cast-aluminum frame and swingarm keep the chassis taut, and there's no slack at corner entry. The nose tucks in and holds.
SV650
Through the Texas Hill Country, the SV650's light trellis frame and neutral steering flick it from one bend to the next on a nudge of the bar. A sharp bump at pace finds the fork and shock short of damping, and the rear wallows once you're pushing. Hard braking sends the front diving. Out of each bend, the V-twin's thrum hauls it on.
The Voice of Experience
What actually separates them
- The SV650 has the lower wet weight: 403 lb (183 kg) vs 459 lb (208 kg).
- The FZ6 makes more peak power: 98 hp (72 kW) vs 71 hp (52 kW).
- The SV650 has the larger engine: 645 cc vs 600 cc.
Which one for the way you ride
Comfortable long-distance riding
Both fall short
Big miles aren't where either one shines. You'll be watching for the next rest stop.
A confidence-building first motorcycle
Not built for it: FZ6
The FZ6 isn't a first bike. Learn on something gentler and come back to it later.
For running costs, you won't find daylight between them. Let the test ride settle it.
Who each one is built for
What's good, and what you'll live with
FZ6
What owners say
Strengths
- Bulletproof engine with low maintenance costs
SV650
What owners say
Strengths
- Punchy, characterful V-twin engine
- Great value and low running costs
- Ideal starter bike with lasting appeal
Trade-offs
- Budget suspension limits aggressive riding
- Weak front brakes
Known problems to check before you buy
FZ6
- Error code 19 / sidestand switch malfunction A faulty sidestand switch or wiring can cause the engine to cut out intermittently.
- Premature steering head bearing wear/corrosion The steering head bearings are susceptible to premature wear and corrosion, leading to looseness, notchy steering feel, and degraded handling precision.
- Throttle Position Sensor (TPS) malfunction A faulty throttle position sensor can send erratic voltage signals to the engine control unit, resulting in fluctuating idle speeds, hesitation, or unexpected engine stalling.
SV650
- Fuel tank weld cracking (California models) Recall 06V013000 On California-spec SV650s (2003–2006), the bracket for the liquid/vapor separator can crack from vibration, leading to fuel leakage. NHTSA recall 06V013000 required fuel tank replacement.
- Front spark plug water ingress The design of the front cylinder spark plug recess allows water and debris to accumulate, especially after washing or riding in heavy rain, causing an engine misfire.
- Oil starvation during extended wheelies The V-twin's oil pick-up can be starved during prolonged wheelies, potentially leading to bearing damage. This is a risk for stunt riders and not a concern for normal street riding.
- Green connector wiring chafe The wiring harness near the steering head or under the seat can chafe, causing intermittent shorts. The most common failure is the 'green connector'—the ignition switch or main harness plug—which causes sudden loss of power or no-start conditions.
What they share
- Cooling
- Liquid-cooled
- Gearbox
- 6-speed
- Final drive
- Chain
Where the spec sheets split
| FZ6 | SV650 | |
|---|---|---|
| Seat height | 31.3 in (795 mm) | 31.5 in (800 mm) |
| Wet weight | 459 lb (208 kg) | 403 lb (183 kg) |
| FZ6 | SV650 | |
|---|---|---|
| Displacement | 600 cc | 645 cc |
| Engine | Inline-four | 90° V-twin |
| Power | 98 hp (72 kW) | 71 hp (52 kW) |
| Peak power at | 12,000 rpm | 8,800 rpm |
| Torque | 47 lb-ft (63 Nm) | 47 lb-ft (64 Nm) |
| Peak torque at | 10,000 rpm | 7,200 rpm |
| FZ6 | SV650 | |
|---|---|---|
| Fuel capacity | 5.1 US gal (19.4 L) | 4.5 US gal (17 L) |
| FZ6 | SV650 | |
|---|---|---|
| Front tire | 120/70-17 | 120/60-17 |
| Rear tire | 180/55-17 | 160/60-17 |
| Wheelbase | 56.7 in (1440 mm) | 56.5 in (1435 mm) |
Head to head, area by area
Both bikes on the same scale, one area at a time.
