Suzuki · Suzuki GS air-cooled four (GS400-GS1100 1976-1988)

GS650E / GS650G / GS650L

Library entry covers 1981-1983

17 factory 44 guideline

Published source

Suzuki GS650G 1982 Owner's Manual (Suzuki Motor Co.), Periodic Maintenance Schedule pp.28-29

Factory owner's handbook. Covers 1982 GS650G owner's manual (US), chart in mi, km and months.

Open the source

61 items for a 1981 model, grouped by interval the way a factory chart is laid out.

How this bike is built (what the schedule is based on)

Engine cycle: Four-stroke
Engine lubrication: Wet sump (oil in crankcase)
Oil filtration: Replaceable cartridge or spin-on filter
Valve gear: Overhead cam, shim adjusted (incl. desmo)
Ignition: Electronic (CDI / transistor / ECU)
Charging: Alternator / stator with rectifier
Battery: Wet cell (flooded lead-acid, needs topping up)
Fuel system: Two or more carburetors
Cooling: Air / oil cooled
Primary drive: Gear or chain inside engine, shares engine oil
Gearbox oil: Shares engine oil
Clutch control: Hand lever, cable
Final drive: Chain
Front suspension: Telescopic fork
Rear suspension: Swingarm, twin shocks
Front brake: Disc, hydraulic
Rear brake: Disc, hydraulic
Wheels: Cast / alloy, tubeless
Sidecar: No sidecar

Maintenance schedule

1981 Suzuki GS650E / GS650G / GS650L

On the road: every 200 mi

1 item

Check engine oil level

Pre-ride / on the road

Guideline

Each fuel stop on old machines. Dry sump: check the tank hot, engine idling or just stopped, per your manual.

On the road: every 300 mi

3 items

Check lights, horn, brake light switches

Pre-ride / on the road

Guideline
Check tire pressures

Pre-ride / on the road

Guideline
Lubricate drive chain

Pre-ride / on the road

Guideline

Lube warm, ideally at the end of the riding day so it soaks in overnight. Sooner after rain.

On the road: every 600 mi

1 item

Check chain slack and rear wheel alignment

Pre-ride / on the road

Guideline

On the road: every 1,000 mi

1 item

Check road kit: plugs, points file, master link, tube patches, wire, tape

Pre-ride / on the road

Guideline

On the road: every 3,728 mi or 12 months

1 item

Walk-around: check nuts and bolts for vibration loosening

Pre-ride / on the road

Factory

Manual: Chassis bolts and nuts: tighten. Factory: Periodic maintenance schedule pp.28-29: dealer item; T at every column, first at 600 mi

Every 1,500 mi or 6 months

1 item

Clean drive chain thoroughly (remove and soak, re-lube)

Final drive

Guideline

Non O-ring chains on old machines: remove, clean, soak in hot chain grease or lube, refit with the master link clip closed end leading.

Every 2,000 mi or 12 months

2 items

Grease swingarm pivot

Rear suspension and frame

Guideline
Lubricate control cables and lever pivots

Controls and cables

Guideline

Every 3,000 mi or 12 months

12 items

Check engine mounting bolts and plates

Engine

Guideline
Check throttle cable(s) free play and return

Fuel and air

Guideline
Clean fuel tap filter / sediment bowl

Fuel and air

Guideline
Synchronize carburetors

Fuel and air

Guideline
Adjust clutch pushrod / clutch adjuster

Primary and gearbox

Guideline
Check chain guard, chain oiler (if fitted), rear chain case

Final drive

Guideline
Inspect chain and sprockets for wear (measure stretch)

Final drive

Guideline
Check steering damper (friction or hydraulic)

Front end

Guideline
Inspect fork seals, stanchions and fork boots

Front end

Guideline
Check footrests, pegs, rear brake and gear lever pivots

Rear suspension and frame

Guideline
Grease and check center / side stand and springs

Rear suspension and frame

Guideline
Check wheel bearings for play

Wheels and tires

Guideline

Every 3,728 mi or 12 months

11 items

Change engine oil

Engine

Factory

Manual: Engine oil: replace. Factory: Periodic maintenance schedule pp.28-29: R at every column, first at 600 mi
Check and adjust valve clearances

Engine

Factory

Manual: Tappet clearance: inspect. Factory: Periodic maintenance schedule pp.28-29: dealer item; I at every column, first at 600 mi
Check cylinder head bolt torque

Engine

Factory

Manual: Cylinder head nuts and exhaust pipe bolts: tighten. Factory: Periodic maintenance schedule pp.28-29: dealer item; T at every column, first at 600 mi
Inspect, clean and gap spark plugs

Engine

Factory

Manual: Spark plugs: clean. Factory: Periodic maintenance schedule pp.28-29: C at 4000 and 11000 mi, R at 7500 and 15000 mi
Replace oil filter

Engine

Factory

Manual: Oil filter: replace. Factory: Periodic maintenance schedule pp.28-29: replaced with the oil at every column, first at 600 mi
Clean / inspect air filter

Fuel and air

Factory

Manual: Air cleaner element: clean. Factory: Periodic maintenance schedule pp.28-29: C at every column from 4000 mi
Check battery electrolyte, top up with distilled water

Ignition and electrics

Factory

Manual: Battery (specific gravity): inspect. Factory: Periodic maintenance schedule pp.28-29: I at 4000/7500/11000/15000 mi columns
Adjust clutch free play, lubricate cable and lever pivot

Primary and gearbox

Factory

Manual: Clutch: inspect. Factory: Periodic maintenance schedule pp.28-29: I at every column, first at 600 mi; carburetor idle rpm at the same interval
Check steering head bearing adjustment

Front end

Factory

Manual: Steering stem: inspect. Factory: Periodic maintenance schedule pp.28-29: dealer item; I at every column, first at 600 mi
Check brake pads and discs

Brakes

Factory

Manual: Brakes: inspect. Factory: Periodic maintenance schedule pp.28-29: dealer item; I at every column, first at 600 mi
Inspect tire tread, sidewalls and date codes

Wheels and tires

Factory

Manual: Tires: inspect. Factory: Periodic maintenance schedule pp.28-29: I at every column, first at 600 mi

Every 6,000 mi or 12 months

4 items

Clean carburetor float bowl(s), check float level and jets

Fuel and air

Guideline

Ethanol fuel varnishes old carbs quickly in storage.
Check charging voltage and regulator / cut-out

Ignition and electrics

Guideline
Check swingarm bushes for play

Rear suspension and frame

Guideline
Lubricate speedometer / tachometer cables, check drive

Controls and cables

Guideline

A dry speedo cable whips the needle and eventually kills the instrument.

Every 6,000 mi or 2 years

2 items

Check engine breather and oil return

Engine

Guideline
Check valve clearances (shim adjusted)

Engine

Guideline

Every 7,500 mi or 2 years

2 items

Replace spark plugs

Engine

Factory

Manual: Spark plugs: replace. Factory: Periodic maintenance schedule pp.28-29: R at 7500 and 15000 mi columns
Inspect rear shocks for leaks and damping

Rear suspension and frame

Factory

Manual: Front forks: inspect. Factory: Periodic maintenance schedule pp.28-29: I at 7500 and 15000 mi columns; check fork air pressure every 6 months

Every 7,500 mi

1 item

Change final drive (rear drive) oil

Final drive

Factory

Manual: Final gear oil (GS650G shaft): replace. Factory: Periodic maintenance schedule pp.28-29: first at 600 mi (1,000 km); GS650E and GS650L are chain drive

Every 10,000 mi or 2 years

2 items

Compression test (or leak-down)

Engine

Guideline
Change fork oil

Front end

Guideline

Some early telescopic forks are grease filled or use very small oil quantities. Check your manual.

Every 10,000 mi

1 item

Replace chain and sprockets (wear based)

Final drive

Guideline

Every 12,000 mi or 2 years

1 item

Replace air filter element

Fuel and air

Guideline

Every 15,000 mi or 5 years

1 item

Inspect clutch plates and springs

Primary and gearbox

Guideline

Every 20,000 mi or 4 years

2 items

Repack / replace steering head bearings

Front end

Guideline

Many old machines use loose balls in cups and cones. Taper roller conversions are common.
Repack / replace wheel bearings

Wheels and tires

Guideline

Cup-and-cone and taper roller hubs need periodic repacking and adjustment.

Every 25,000 mi or 6 years

1 item

Replace swingarm bushes / bearings

Rear suspension and frame

Guideline

Every 30,000 mi or 6 years

1 item

Rebuild forks: seals, bushes, springs

Front end

Guideline

Every 6 months

1 item

Clean battery terminals, check charge and strap

Ignition and electrics

Guideline

Every 12 months

1 item

Check speedometer / odometer against a known distance

Controls and cables

Guideline

Old speedos drift with tire size and drive wear. Use phone GPS over a measured 10 miles / km.

Every 2 years

6 items

Inspect fuel tank for rust, sealer failure, leaks

Fuel and air

Guideline
Replace fuel lines

Fuel and air

Factory

Manual: Fuel line: replace. Factory: Periodic maintenance schedule pp.28-29: dealer item; replace every two years
Inspect wiring, bullet connectors and ground points

Ignition and electrics

Guideline
Inspect frame, welds and lugs for cracks

Rear suspension and frame

Guideline
Inspect brake hoses; replace old rubber

Brakes

Factory

Manual: Brake hose: replace. Factory: Periodic maintenance schedule pp.28-29: dealer item; replace every two years; brakes inspected at every column, first at 600 mi
Replace brake fluid

Brakes

Guideline

Every 4 years

1 item

Rebuild calipers and master cylinders (seals)

Brakes

Guideline

Every 6 years

1 item

Replace tires on age (regardless of tread)

Wheels and tires

Guideline

Guideline lines: Intervals here are general guidelines for the machine's era and layout, compiled for this app. They are not factory manual figures. Check your workshop manual, and edit any interval in the bike's Schedule tab.