Suzuki GSF1250 Service Manual

Manual Transmission: 5B-1
Transmission / Transaxle
Manual Transmission
Diagnostic Information and Procedures
Manual Transmission Symptom Diagnosis
B718H15204001
Condition Possible cause Correction / Reference Item
Engine is noisy (Noise
seems to come from the
transmission).
Worn or rubbing gear. Replace.
Worn countershaft spline. Replace countershaft.
Worn driveshaft spline. Replace driveshaft.
Worn or rubbing primary gear. Replace.
Worn bearing. Replace.
Transmission will not
shift.
Broken gearshift cam. Replace.
Distorted gearshift fork. Replace.
Worn gearshift pawl. Replace.
Transmission will not
shift back.
Broken gearshift shaft return spring. Replace.
Rubbing or stuck gearshift shaft. Repair or replace.
Worn or distorted gearshift fork. Replace.
Transmission jumps out
of gear.
Worn shifting gears on driveshaft or
countershaft.
Replace.
Worn or distorted gearshift fork. Replace.
Weakened gearshift stopper spring. Replace.
Worn gearshift cam plate. Replace.

Suzuki GSF1250 Specifications

General

Displacement	1255 cc
Bore x Stroke	79.0 mm x 64.0 mm
Compression Ratio	10.5:1
Fuel System	Fuel injection
Transmission	6-speed, constant mesh
Front Suspension	Telescopic, coil spring, oil damped
Rear Suspension	Link type, coil spring, oil damped
Front Brakes	Dual hydraulic disc
Rear Brakes	Single hydraulic disc
Front Tire	120/70ZR17M/C (58W), tubeless
Rear Tire	180/55ZR17M/C (73W), tubeless
Overall Length	2130 mm
Overall Width	790 mm
Seat Height	805 mm
Wheelbase	1485 mm
Fuel Tank Capacity	19.0 L
Starter	Electric
Final Drive	Chain
Ignition	Electronic ignition (transistorized)
Engine Type	4-stroke, liquid-cooled, DOHC
Ground Clearance	135 mm