Suzuki GSF1250/S/A/SA – 2007 Service Manual (P/N 99500-39300-01E)

This Suzuki factory service manual covers the 2007 GSF1250, GSF1250S, GSF1250A, and GSF1250SA (K7), including naked, half-faired, non-ABS, and ABS configurations. P/N 99500-39300-01E; copyright Suzuki Motor Corporation 2006.

Searchable Service Text, Bookmarks, and Diagram Detail

Search and navigation: Most service text is searchable, but the intake and exhaust shim-selection charts are not text-searchable. Nine embedded PDF bookmarks link to the contents and main sections. Small labels in the wiring diagrams are readable when enlarged.

A 686-page PDF in English, supplied as one printable file. The total includes seven front/back matter pages: the cover, foreword, two overall contents pages, one blank page, imprint, and back cover.

Engine Overhaul, FI Diagnosis, and ABS Service

The following are selected workshop topics, rather than a complete contents list; additional subjects include combination-meter testing and seat-height adjustment.

• Engine repair: Step-by-step procedures for engine removal and installation, top- and bottom-end disassembly, cylinder-head service, camshaft timing, and internal inspection.

• Fuel injection: DTC troubleshooting, sensor and actuator tests, throttle-body service and synchronization, fuel-pressure checks, and ISC initialization.

• Transmission and clutch: Countershaft and driveshaft gear disassembly, gearshift inspection, wet multi-plate clutch service, and hydraulic master/release-cylinder repair.

• Cooling and lubrication: Water-pump disassembly, seal inspection, thermostat testing, radiator service, cooling-circuit bleeding, and oil-pressure diagnosis.

• Brakes and ABS: Master-cylinder and caliper overhaul, brake bleeding, wheel-speed sensor inspection, ABS fault tracing, and hydraulic-unit active-control checks.

• Suspension and chassis: Front-fork overhaul, steering-stem bearings, swingarm and cushion-lever bearings, wheel-bearing replacement, wheel balancing, and drive-chain replacement.

• Electrical systems: Ignition fault tracing, starter-motor disassembly and inspection, charging-system tests, interlock checks, and model-specific wiring diagrams.

Written for people with the knowledge, skills, and tools—including special tools—needed to service Suzuki motorcycles; generally known service information is not repeated.

K7 Market Coverage and Configuration Differences

The application data helps confirm whether the publication matches a market-specific K7. It identifies E-02 U.K., E-03 U.S. except California, E-19 E.U., E-24 Australia, E-28 Canada, and E-33 California configurations with effective frame numbers.

North American GSF1250S K7 coverage starts at JS1GW72A 72100001, while GSF1250SA K7 starts at JS1GW72B 72100001. The E-33 California configuration receives evaporative-emission coverage and an 18.5 L fuel-tank specification, compared with 19.0 L for the other listed markets.

Specifications reflect the publication’s production configuration; later modifications may differ.

Internal Engine Work and Drivetrain Service

Valve-guide replacement and valve-seat repair are documented alongside crankshaft and connecting-rod bearing selection. A component table identifies work that can be performed with the engine installed.

The wet-sump lubrication section covers the oil pump, strainer, pressure regulator, and oil cooler. Service data distinguishes oil-change, filter-change, and overhaul quantities and provides staged cylinder-head bolt tightening specifications.

Transmission instructions extend to individual shaft gears and gearshift components. Clutch documentation includes plate inspection, hydraulic bleeding, and the clutch sleeve-hub holder 09920-53740, with component-specific tightening data.

Drive-chain inspection includes 20–30 mm slack with the motorcycle on its center stand and a 319.4 mm service limit over 20 pitches. The manual warns that aggressive cleaning solvents can damage the chain’s O-rings.

FI Fault Tracing and Suzuki Diagnosis System

Sensor and circuit diagnosis: A 60-terminal ECM coupler map accompanies DTC and fail-safe tables and sensor input/output values. Troubleshooting covers CKP, IAP, TP, ECT, IAT, tip-over, and STVA/STPS circuits.

Further charts address ignition, gear-position, injector, ISC, fuel-pump relay, HO2, PAIR, and cooling-fan faults. Fuel-system procedures distinguish pressure checks from pump-output testing.

SDS functions: Suzuki Diagnosis System coverage includes DTC history, reset functions, live-data sampling, and “Show Data When Trouble.” Stored engine and riding conditions help relate a fault code to what was happening when the malfunction occurred.

Throttle-body synchronization includes ISC air-volume control and the associated learned-value reset. The STVA and integrated IAP/TP/IAT sensor are serviced with the throttle body as an assembly.

Diagnostic references include SDS set 09904-41010, FI mode select switch 09930-82720, multi-circuit tester set 09900-25008, and needle-pointed probe set 09900-25009.

Disconnecting the ECM coupler, battery, ECM ground, or main fuse can erase stored FI fault information. Electrical precautions explain how reversed battery polarity can damage FI/ABS electronics and forced tester probes can damage ECM terminals.

ABS, Brake Service, and Suspension Settings

GSF1250A/SA documentation covers the ABS control unit/hydraulic unit, wheel-speed sensors and rotors, DTC output/deletion, and SDS active-control checks. References include ABS mode select switch 09930-82710 and dedicated 20 A motor and 15 A valve fuse circuits. The ABS control unit/HU cannot be disassembled.

Brake sections provide master-cylinder and caliper inspection criteria, disc wear limits, hose routing, and bleeding procedures.

Fork and shock differences: Fork oil capacity is 472 ml per leg on GSF1250/A and 471 ml on GSF1250S/SA. Corresponding oil levels are 143 and 144 mm, measured without the spring and with the outer tube fully compressed.

Rear-shock spring preload is specified at the 3rd position for GSF1250/A and 4th for GSF1250S/SA. The shock is covered for inspection, adjustment, and replacement; internal disassembly is expressly excluded.

Electrical Tests and System Drawings

Starting and charging sections include starter-relay and interlock diagnosis, starter-motor inspection, battery-current leakage checks, generator tests, and regulator/rectifier testing.

Reference drawings include the FI System Wiring Diagram, Engine Lubrication System Chart Diagram, and Cooling Circuit Diagram. The ABS Wiring Diagram, ABS Unit Diagram, and Wiring Harness Routing Diagram support electrical and installation work; full-machine wiring diagrams are separated by model and market.

Working on motorcycles carries inherent physical risks; follow the manual’s precautions for fuel, brake, ABS, cooling, and electrical repair work and use the specified equipment before disassembly or adjustment.

A Preview of Valve-Clearance and Pressure Specifications

Cold valve-clearance specifications are 0.10–0.20 mm intake and 0.20–0.30 mm exhaust, supported by shim-selection charts. Compression-test data specifies 1,300–1,700 kPa with a 1,000 kPa service limit, using a warmed engine and fully open throttle.

Oil-pressure diagnosis specifies 100–400 kPa at 3,000 rpm with oil at 60 °C. Fuel-system data lists approximately 300 kPa regulator set pressure, alongside pressure-inspection procedures and fault checks.