1969 Suzuki T500-II Service & Repair Manual with GT500A Technical Bulletin

This Suzuki Motor Co., Ltd. publication combines the T500-II service manual, dated May 10, 1969, with the GT500A New Model Technical Bulletin. It documents the air-cooled two-stroke twin and its chassis, with supplemental maintenance information for the GT500A's changed systems.

• Engine and transmission: Engine removal and installation, crankcase separation, cylinder and crankshaft inspection, wet multi-disc clutch repair, gear shifting mechanism service, and kick starter inspection.

• Fuel and lubrication: VM 32 SC homo-pressure carburetor overhaul and balancing, diaphragm fuel cock operation, Posi-Force oil-line bleeding, and pump-control adjustment.

• Chassis service: Telescopic front fork disassembly, oil-seal replacement, steering damper service, wheel balancing and alignment, and brake adjustment.

• Ignition and charging: T500-II contact breaker, A.C. generator, ignition coil, condenser, rectifier, and voltage regulator checks, with ignition timing procedures.

• GT500A updates: PEI/CDI diagnosis, revised front fork maintenance, front disc brake checks, and model-specific service data and parts-interchangeability guidance.

• Troubleshooting and references: Fault charts for starting, running, overheating, clutch, gear selection, brakes, and steering, plus tightening torques and special tool listings.

The service manual is written for mechanics; crankshaft repair calls for precision measuring equipment, dedicated jigs, and a press.

Engine and Transmission Repair

The engine section distinguishes work possible with the engine in the frame from repairs requiring removal and crankcase separation. Cylinder, piston, ring, bearing, and oil-seal inspection accompany the disassembly and assembly procedures.

Clutch coverage includes plate wear, spring condition, housing play, and release adjustment. Transmission and kick starter sections explain gear engagement, shifting-fork wear, pawl operation, and assembly details, supported by exploded views of the transmission and crankshaft assembly. Crankshaft bearing service specifies puller 09913-61110.

Assembly cautions explain how incorrect piston orientation can break rings and damage the engine, and how prying between crankcase halves can damage the sealing surfaces.

Carburetors, Fuel Supply and Posi-Force Lubrication

The carburetor section covers jet needles, main-jet selection, float inspection, idle adjustment, and balancing the two cylinders. Its exploded carburetor view accompanies the component descriptions. Fuel tank mounting and the vacuum-operated diaphragm fuel cock are also documented.

The Posi-Force section explains oil pump operation, control-lever adjustment, and line bleeding, with an oil pump performance curve. Pump servicing is limited to external work: the manual cautions against dismantling the precision pump or its non-rebuildable oil-line check valves.

Front Fork, Steering and Wheels

Front fork procedures cover disassembly, seal replacement, and oil-level measurement, supported by an exploded fork view. Steering damper and steering-stem checks accompany wheel balancing, alignment, and brake adjustments. The periodical inspection chart organizes routine maintenance, while engine and motorcycle performance curves provide operating reference data.

Fuel handling, ignition testing, and brake work require appropriate workshop safety precautions.

T500-II Ignition and GT500A Electrical Changes

The T500-II electrical chapter provides contact-breaker inspection, static and timing-lamp checks, alternator output data, condenser-capacity checks, and charging-system diagnosis. A sectional view of the ignition system and the full T500-II wiring diagram document the battery-ignition circuit.

The GT500A bulletin covers PEI ignition, with the GT500 ignition and charging circuit diagram, a CDI checking chart, and coil-resistance tests. The CDI chart specifies Suzuki pocket tester 09900-25001. Regulator testing includes the required engine-speed, battery, and electrical-load conditions.

GT500A Maintenance and Parts Compatibility

The bulletin adds Mikuni VM32SS carburetor settings, polyurethane air-cleaner servicing, and revised front fork procedures. Its front disc brake section covers fluid level and specification, pad wear, and disc-thickness inspection.

Parts-interchangeability notes distinguish the front forks, fuel tanks, fenders, meters, and ignition switches. They also explain that the GT500 front disc brake does not fit the T500. These distinctions help identify incompatible replacement parts before ordering or attempting a conversion.

A Preview of Engine Inspection and Ignition Data

These are a few examples of the inspection and adjustment data in the manual. T500-II standard piston-to-cylinder clearance is 0.065–0.075 mm, using the cylinder bore 5 mm above the exhaust port and piston diameter 32 mm above the skirt, perpendicular to the piston pin.

The T500-II crankshaft runout limit is 0.06 mm; its contact breaker gap specification is 0.3–0.4 mm.

For GT500A regulator testing, specified battery voltage is 14 ± 0.5 V at 4,000 rpm, with a fully charged battery and the lights and other electrical loads switched off.

PDF Search, Diagram Detail and Page Breakdown

Search and diagram detail: PDF text search and embedded bookmarks are not available. Small labels in the T500-II wiring diagram and GT500 ignition/charging schematic are readable when enlarged.

One printable 143-page PDF contains 113 pages of T500-II manual material and reference sheets, 22 pages of GT500A bulletin material, and eight shared cover or blank pages. These totals already include all covers, 12 blank pages, one publisher page, the bulletin memo page, and the three T500-II reference sheets for periodic inspection, wiring, and the engine assembly.