1988-1991 Honda NT650 Hawk GT Parts Manual
This parts manual for the 1988-1991 Honda NT650 Hawk GT provides comprehensive coverage of all components. Includes detailed diagrams and part numbers for efficient identification and ordering of replacement parts
Honda Models Covered & Key Technical Specifications
Models: Honda NT650 Hawk GT
Sub-models / Variants: 88, 89, 90, 91 (model years), California and non-California emissions variants
Model Years: 1988–1991
Serial Numbers:
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NT650 88: RC31E-2000015 to 2004639 (engine), RC310-JM000007 to JM003038 (frame)
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NT650 89: RC31E-2100031 to subsequent (engine), RC310-KM100011 to subsequent (frame)
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NT650 90: RC31E-2200001 to subsequent (engine), RC310-LM200001 to subsequent (frame)
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NT650 91: RC31E-2300001 to subsequent (engine), RC311-MM300001 to subsequent (frame)
Technical Data:
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Engine: 647 cc V2, 4-stroke, water-cooled
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Valve Configuration: OHC, 3 valves per cylinder
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Transmission: 5-speed, constant mesh, wet multi-plate clutch
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Front Suspension: Telescopic fork
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Tires: 110/80-17 57H (front), 150/70-17 69H (rear)
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Fuel Capacity: 3.18 gal (standard), 2.10 gal (reserve)
Honda Manual Features & Content Preview
1988–1991 Honda NT650 Hawk GT Parts Catalog
- Instant PDF download with fully searchable text, letting you track down exact OEM part numbers in seconds.
- Covers all 1988–1991 Honda NT650 Hawk GT models, including California and 49-state engine variants.
- Official 102-page American Honda Motor Co. publication (14MN8JM, first edition published December 1993).
- Features 80 exploded-view diagrams spanning the engine, frame, chassis, electrical, and cooling systems.
- Securely stored in your account for lifetime access and easy retrieval if you ever experience a hard-drive loss.
- The definitive parts reference for the RC31E-series V-twin engine and chassis assembly.
Component Breakdown and Shop Utility
Tired of guessing which fastener goes where? This factory parts manual gives you an uncompromising look at the entire 647cc motorcycle. It organizes every gasket, bolt, and major assembly into a clear, grid-referenced catalog to save you time at the workbench. You'll find detailed visual breakdowns of the complete cylinder head, transmission gear sets, crankshaft components, and the Hawk GT's signature single-shock rear suspension.
To guarantee accurate ordering, all diagrams pair directly with official Honda codes and detailed serial number cross-references. This takes the guesswork out of identifying the exact correct component for your specific '88 through '91 production unit, preventing costly mistakes at the parts counter.
Technical Specifications and Identification Data
Beyond exploded views, this manual delivers critical baseline data for your daily workshop routine. Technical tables outline engine displacement, lubrication requirements, and specific tolerances like the intake valve clearance (0.13–0.17 mm). Need to replace aging lines? There is a highly practical bulk hose cross-reference chart for accurate fuel and vacuum routing.
When working on fuel systems or chassis components, using the correct hardware is critical for vehicle integrity. Always verify fitment specifications and utilize proper shop equipment during reassembly to ensure a safe, roadworthy build.
The catalog also verifies standard chassis and electrical specs. It documents factory tire pressures (33 PSI front, 36 PSI rear on 17-inch wheels) and includes a complete index for identifying the correct YTX9-BS battery, headlight assemblies, and signal bulbs. Whether you're doing a full restoration or a quick routine fix, this reference ensures your Hawk GT stays authentic and reliable.
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