Hyosung GT 650 R (2005–2018): A V-Twin Underdog with Surprising Charms

Introduction

The Hyosung GT 650 R is a motorcycle that defies expectations. Produced from 2005 to 2018, this Korean-built sportbike carved out a niche as an affordable alternative to Japanese middleweights like the Suzuki SV650 and Kawasaki Ninja 650. While it never quite shook off its reputation as a "budget" option, the GT 650 R offers a unique blend of V-twin character, sport-touring versatility, and enough performance to keep riders grinning. After spending a week with a well-maintained 2014 model, here’s why this underdog deserves a second look.

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Engine and Performance: Thump Meets Hustle

At the heart of the GT 650 R lies a 647cc, liquid-cooled, 90-degree V-twin engine. Early models (2005–2008) used carburetors, but from 2009 onward, fuel injection smoothed out throttle response. Output hovers around 76–79 HP (56–58 kW) and 66–68 Nm (49–50 lb-ft) of torque, with peak power arriving at 9,000 RPM.

Riding Impressions:

• Mid-Range Muscle: The engine’s sweet spot lives between 3,000–7,500 RPM. Crack the throttle in third gear, and the bike surges forward with a throaty exhaust note that’s more "growl" than "scream." It’s no supersport, but the torque-rich delivery makes overtaking or carving canyon roads effortless.
• High-RPM Limitations: Spin it past 8,000 RPM, and vibrations creep into the bars and pegs. The engine feels strained here, urging you to short-shift—a reminder that this V-twin prefers relaxed cruising over redline heroics.
• Fuel Injection vs. Carburetion: Later FI models (post-2009) eliminate the low-RPM hesitation noted in early carbureted versions. Cold starts are drama-free, and throttle transitions feel sharper.

Metric/Imperial Conversions:
- 647cc = 39.48 cubic inches
- 79 HP = 59 kW | 68 Nm = 50.2 lb-ft

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Handling and Ride Experience: Confidence in the Corners

Hyosung equipped the GT 650 R with a steel twin-spar frame, 41mm inverted forks, and a preload-adjustable rear monoshock. At 208–215 kg (458–474 lbs) wet, it’s no featherweight, but the chassis hides its heft well.

On the Road:

• Flickable Geometry: With a 25-degree rake and 1435mm wheelbase (56.5 inches), the GT 650 R changes direction eagerly. It’s no track weapon, but it carves twisties with a neutral, planted feel.
• Suspension Tuning: The USD forks absorb bumps competently, though adjusting the damping (on later models) yields minimal change. The rear shock handles two-up riding better than expected—no small feat for a budget bike.
• Braking: Dual 300mm front discs with 4-piston calipers (post-2010) offer adequate stopping power. Initial bite is soft compared to rivals, but modulation improves with aftermarket pads.

Ergonomics:
- Seat Height: Ranges from 780mm (30.7") to 831mm (32.7")—accessible for shorter riders.
- Riding Position: Semi-aggressive clip-ons and rearset pegs strike a balance between sporty and touring-friendly. After an hour in the saddle, my wrists and knees still felt fresh.

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Design and Features: Function Over Flair

The GT 650 R’s styling echoes early-2000s Japanese sportbikes, with a full fairing, dual headlights, and a stepped seat. Build quality improved over its 13-year run, but fit-and-finish quirks persist:

• Highs: LED taillights (2013+), adjustable levers, and a 17L fuel tank (4.5 gallons) for 250+ km (155+ mi) range.
• Lows: Cheap switchgear, uneven panel gaps, and a dated analog-digital dash.

Passenger-Friendly?

Surprisingly, yes. The pillion seat is wide and cushioned, and grab rails (added in 2011) inspire confidence. My passenger praised comfort during a 2-hour ride—something rarely said about sportbikes.

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Competition: How Does It Stack Up?

The GT 650 R faced fierce rivals in the 650cc segment. Here’s how it compares:

1. Suzuki SV650

• Pros: Legendary smoothness, aluminum frame, cult following.
• Cons: Pricier, less torque below 5,000 RPM.
• Verdict: The SV650 is the GT’s spiritual sibling but with polish the Hyosung lacks.

2. Kawasaki Ninja 650

• Pros: Parallel-twin revs freely, sharper styling, superior brakes.
• Cons: Less characterful engine, higher seat height.
• Verdict: The Ninja feels more modern but lacks the GT’s V-twin charm.

3. Honda CBR650F

• Pros: Inline-4 refinement, bulletproof reliability.
• Cons: Heavier, higher cost of ownership.
• Verdict: The Honda is a better all-rounder but doesn’t excite like the GT.

Hyosung’s Edge:
- Price: New, it undercut rivals by ~15%. Today, used models sell for 30–50% less than comparable SV650s.
- Customization: The simple chassis and ubiquitous V-twin make it a blank canvas for mods.

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Maintenance: Keeping the GT 650 R Thriving

Ownership costs are where the GT 650 R shines. Here’s what to prioritize:

Key Service Intervals:

• Oil Changes: Every 5,000 km (3,100 mi) with 3.2L of 10W-40 (API SG+). Consider synthetic blends for smoother shifts.
• Valve Adjustments: Every 12,000 km (7,500 mi). Intake: 0.1–0.2mm, Exhaust: 0.2–0.3mm (cold).
• Coolant: Replace every 2 years using 1.6L of ethylene glycol mix.
• Spark Plugs: NGK CR8E or iridium CR8EIX every 16,000 km (10,000 mi).

Common Upgrades:

• Brake Pads: Swap stock pads for EBC HH sintered compounds.
• Suspension: Hyperpro springs and oil improve front-end feedback.
• Exhaust: A slip-on (e.g., Delkevic) unlocks the V-twin’s rumble without breaking the bank.

Pro Tip: Check the clutch cable free play frequently—stiff engagement is a common griate.

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Conclusion: The Underdog’s Appeal

The Hyosung GT 650 R isn’t perfect. It’s rough around the edges, outgunned by Japanese rivals, and lacks the prestige of European brands. Yet, there’s something endearing about its honest, unpretentious nature. For riders seeking a budget-friendly V-twin that can commute, tour, and play on backroads—all while turning heads with its muscular stance—the GT 650 R delivers. It’s a reminder that sometimes, imperfection has its own kind of charm.

Whether you’re refreshing an older model or personalizing a newer one, MOTOPARTS.store has the components to keep your GT 650 R running strong—from OEM-spec NGK plugs to performance brake upgrades.

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Specifications sheet

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