The Honda NT650 Hawk GT was sold in the US from 1988 to 1991, a short-lived but well-regarded 647cc V-twin sport standard. It featured a 52-degree liquid-cooled V-twin (related to the NTV650/Bros 650 sold in other markets), a single-sided swingarm (Pro-Arm), and shaft drive, an unusual combination for a middlewight sport bike. Only about 5,000 units were sold in the US across its four-year run, making it uncommon but not rare. Sun Coast stocks used Hawk GT parts sourced from specific donor machines at our Florida facility, each inspected and cataloged individually.
Hawk NT650 generation and parts compatibility
The NT650 Hawk GT received no significant changes during its 1988-1991 US production run. The 647cc V-twin, steel frame, Pro-Arm single-sided swingarm, shaft drive, and bodywork were consistent across all four model years. All parts interchange across the full production range. Color and minor cosmetic changes are the only year-to-year differences.
The Hawk GT shares its basic engine architecture with the Honda NTV650/Bros 650 (sold in Japan, Europe, and Australia) and the Revere NTV650. Engine internals like pistons, valves, crankshaft, and connecting rods interchange between these models. However, the Hawk GT's frame, single-sided swingarm, bodywork, and exhaust are unique to the US model. The NTV650 uses a double-sided swingarm and different frame, so chassis components do not cross. The Hawk GT shares no parts with the larger NT700V Deauville or the smaller NTV600 Revere despite similar naming conventions.
Common Hawk NT650 failure points and replacement parts
Fuel system age deterioration: All surviving Hawk GTs are now 33-37 years old. Carburetor diaphragms, float valves, o-rings, and fuel petcock are the most commonly failed items, all due to age and ethanol fuel degradation. Full carburetor rebuilds are standard maintenance on any Hawk GT purchase.
Starter clutch wear: The one-way starter clutch can wear on higher-mileage examples, causing a grinding or slipping sensation when the starter motor engages. This requires engine case disassembly to access.
Final drive spline maintenance: Like the ST1100 and other Honda shaft-drive models, the output splines require periodic molybdenum grease application. Neglected splines wear prematurely.
Pro-Arm swingarm bearing: The single-sided swingarm pivot bearing can develop play at higher mileage, causing handling vagueness. Bearing replacement requires the swingarm to be removed.
The NT650 Hawk GT has no NHTSA recalls. Its issues are entirely age-related rather than design defects.
Commonly replaced Hawk NT650 parts
- Carburetor rebuild kits and diaphragms
- Fuel petcock
- Starter clutch
- Final drive seals and bearings
- Pro-Arm swingarm pivot bearing
- Fork seals
- Brake pads
- Bodywork (increasingly scarce)
Frequently asked questions
Q: Do Honda NTV650 (Bros/Revere) engine parts fit the Hawk GT?
Yes, engine internals are shared between the Hawk GT and the NTV650/Bros 650 family. Pistons, valves, crankshaft, and transmission components interchange. However, the Hawk GT uses a unique frame, single-sided Pro-Arm swingarm, and specific bodywork that are not compatible with the NTV650's double-sided swingarm chassis.
Q: Are Hawk GT body panels still available?
Honda discontinued OEM body panel production for the NT650 years ago. Used panels from donor bikes are the primary source. Because fewer than 5,000 Hawk GTs were sold in the US, clean bodywork commands a premium. Some aftermarket fiberglass reproduction panels exist for the tail section and front fender.
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