2007–2008 Suzuki GSF650, GSF650S & GSX650F Factory Service Manual

Suzuki's factory service manual covers maintenance, diagnosis, and repair of the 2007–2009 GSF650, GSF650S, and GSX650F family, including the listed U, SU, and FU variants. The Suzuki Motor Corporation text carries a 2007 copyright; the included GSX650FK9 supplement provides specifications and refers to K8 service data.

• Engine repair: Engine removal, cylinder-head service, piston inspection, crankcase disassembly, and crankshaft and connecting-rod bearing selection.

• Fuel injection: DTC troubleshooting, Suzuki Diagnosis System (SDS) checks, throttle-body synchronization, and idle speed control (ISC) valve initialization.

• Cooling and lubrication: Cooling-system pressure tests, thermostat inspection, water-pump service, oil-pressure diagnosis, and oil-pump inspection and replacement.

• Transmission and clutch: Shaft and gear disassembly, shift-mechanism inspection, clutch-plate checks, hydraulic-control repair, and clutch-circuit bleeding.

• Suspension and brakes: Front-fork overhaul, steering-stem bearing replacement, swingarm service, brake-caliper and master-cylinder repair, and brake-circuit bleeding.

• Electrical systems: Ignition, starting, charging, and interlock diagnosis, supported by component-location illustrations, ECM terminal views, and wiring diagrams.

This manual is written for users who already have the knowledge, skills, and special tools needed to service Suzuki motorcycles.

Engine Repair and Scheduled Maintenance

Periodic maintenance charts cover fluid changes, valve checks, throttle adjustment, and drive-chain service. Valve-shim selection charts and the camshaft and sprocket assembly diagram support top-end work; bottom-end procedures include bearing selection and crankshaft thrust-clearance inspection.

Service-data tables provide compression-test specifications, bore and stroke dimensions, piston inspection limits, transmission gear ratios, and engine and chassis tightening torques.

SDS Diagnosis and Fuel-System Service

SDS instructions cover current and stored DTCs, captured fault data, and comparison with previously recorded operating data. The captured engine and riding conditions help a technician investigate an intermittent fault under the conditions in which it occurred.

Circuit tests address the CKP and TP sensors, secondary throttle valve actuator (STVA), and fuel-pump relay. Procedures identify the SDS set 09904-41010 and mode select switch 09930-82720.

Throttle-body procedures cover synchronization and ISC preset/opening initialization. The STVA and integrated IAP/TP/IAT sensor are available only with the throttle-body assembly. A handling caution explains how twisting the fuel-delivery T-joint can damage the delivery pipe.

PAIR inspection covers the reed valve and control solenoid. EVAP canister inspection and the EVAP canister hose routing diagram apply to the E-33 California configuration.

Cooling and Lubrication

The cooling circuit and water hose routing diagrams accompany radiator, cooling-fan, thermostat, and water-pump procedures. Water-pump inspection distinguishes the mechanical seal, oil seal, impeller, and shaft.

The engine lubrication system chart diagram supports oil-circuit diagnosis, with separate procedures for the strainer, pressure regulator, and oil jets.

Suspension, Brakes, and Drivetrain

Front-fork inspection includes the inner and outer tubes, spring, cylinder, and cylinder ring. Steering service includes bearing replacement and tension adjustment. Rear-shock procedures cover removal, inspection, adjustment, and replacement; the shock absorber is identified as internally nonserviceable.

Transmission inspection covers gears, shift forks, and shafts. Clutch and brake sections include hydraulic cylinder disassembly, seal inspection, and bleeding procedures.

Wiring and Electrical Troubleshooting

Full wiring sheets are labeled for GSF650 E-28, GSX650F E-03/E-24/E-28, and GSX650F E-33 configurations. The FI system wiring diagram and ECM pinouts support circuit diagnosis; throttle cable routing diagrams distinguish GSF650 and GSX650F layouts.

Electrical precautions explain how excessive probe pressure can bend or damage ECM connector terminals. Fuel-system and electrical work requires the manual's precautions for pressurized fuel and circuit protection.

A Preview of Valve and Piston Clearances

These clearance figures are a small sample of the engine service data in the manual.

Valve inspection: For the covered engines, cold valve clearance is 0.10–0.20 mm on the intake side and 0.20–0.30 mm on the exhaust side.

Cylinder and piston inspection: Piston-to-cylinder clearance is listed at 0.030–0.040 mm standard, with a 0.120 mm service limit.

Searchable Text, Bookmarks, and PDF Contents

Finding procedures and reading diagrams: Searchable text and embedded bookmarks provide access to the main service sections and the K9 supplement. Small wire-color codes and connector labels on the detailed wiring sheets require zooming.

Supplied as one printable, 620-page English PDF: 618 pages of base-manual material and a two-page GSX650FK9 supplement. The total includes six front-matter pages, including three blank pages.