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SYM · Overhead-cam four-stroke single, wet sump, separate gearbox oil, CVT belt drive

Maxsym 400

Library entry covers 2011-2025

34 factory 52 guideline

Published source

SYM MAXSYM 400 Owner's Manual, Periodic Maintenance Schedule pp.53-54 (manualsnet)

Factory source. Covers SYM MAXSYM 400 owner's manual on manualsnet (no year printed in the pages read; the manual covers ABS, TCS and a smart key system); other editions not checked.

86 items for a 2023 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, screw/locknut adjusters
Ignition: Electronic (CDI / transistor / ECU)
Charging: Alternator / stator with rectifier
Battery: Wet cell (flooded lead-acid, needs topping up)
Fuel system: Fuel injection
Cooling: Liquid cooled
Primary drive: Gear or chain inside engine, shares engine oil
Gearbox oil: Separate gearbox oil
Clutch control: Hand lever, cable
Final drive: Belt CVT, scooter automatic
Front suspension: Telescopic fork
Rear suspension: Swingarm, twin shocks
Front brake: Disc, hydraulic
Rear brake: Drum (or band / belt rim)
Wheels: Spoked, tubed
Sidecar: No sidecar

Maintenance schedule

2023 SYM Maxsym 400

On the road: every 300 km

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 500 km

2 items

Check lights, horn, brake light switches

Pre-ride / on the road

Guideline
Check tire pressures

Pre-ride / on the road

Guideline

On the road: every 800 km

1 item

Check coolant level

Pre-ride / on the road

Guideline

Every 1,000 km

1 item

Engine oil level (inspect)

Engine

Factory

Factory: Periodic Maintenance Schedule (owner manual pp.53-54): every 1,000 km. Columns as printed: 1,000 km; 10,000 km; 20,000 km; 30,000 km; 40,000 km; annual service. For higher readings repeat at the same frequency. Key: I inspect or adjust, C clean, R replace, L lubricate. * service more often in severe conditions; # service annually or at the odometer interval, whichever comes first.

Every 1,600 km or 6 months

2 items

Adjust rear drum brake and rod / cable linkage

Brakes

Guideline
Inspect tire tread, sidewalls and date codes

Wheels and tires

Guideline

Every 5,000 km or 12 months

10 items

Engine oil (replace)

Engine

Factory

Factory: Periodic Maintenance Schedule (owner manual pp.53-54): at 1,000 km, second at the first 5,000 km, every 5,000 km thereafter; also at the annual service. Columns as printed: 1,000 km; 10,000 km; 20,000 km; 30,000 km; 40,000 km; annual service. For higher readings repeat at the same frequency. Key: I inspect or adjust, C clean, R replace, L lubricate. * service more often in severe conditions; # service annually or at the odometer interval, whichever comes first.
Engine oil filter screen (clean)

Engine

Factory

Factory: Periodic Maintenance Schedule (owner manual pp.53-54): at 1,000 km, second at the first 5,000 km, every 5,000 km thereafter; also at the annual service. Columns as printed: 1,000 km; 10,000 km; 20,000 km; 30,000 km; 40,000 km; annual service. For higher readings repeat at the same frequency. Key: I inspect or adjust, C clean, R replace, L lubricate. * service more often in severe conditions; # service annually or at the odometer interval, whichever comes first.
Check throttle cable(s) free play and return

Fuel and air

Guideline
Check steering head bearing adjustment

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 brake pads and discs

Brakes

Guideline
Check spoke tension and wheel true

Wheels and tires

Guideline
Check wheel bearings for play

Wheels and tires

Guideline

Every 6,500 km or 12 months

4 items

Inspect, clean and gap spark plugs

Engine

Guideline
Adjust clutch free play, lubricate cable and lever pivot

Primary and gearbox

Guideline
Inspect CVT drive belt, rollers / sliders and clutch shoes

Final drive

Guideline

Typical scooter interval. Your owner's manual figure governs; check belt width against the service limit.
Lubricate brake cam spindles, check linings and drums

Brakes

Guideline

Every 8,000 km or 12 months

2 items

Change engine oil

Engine

Guideline

Pre-1970 machines: many owners run non-detergent or classic-spec oil with no filter, so short intervals matter. Dry sump: drain the tank and the crankcase/sump, flush the tank and clean the feed and return screens.
Replace oil filter

Engine

Guideline

Every 9,500 km or 12 months

7 items

Inspect coolant hoses and clamps

Engine

Guideline
Clean / inspect air filter

Fuel and air

Guideline

Mesh or oiled foam: clean and re-oil. Paper: blow out or replace. Some very early machines have no filter at all.
Check charging voltage and regulator / cut-out

Ignition and electrics

Guideline
Check swingarm bushes for play

Rear suspension and frame

Guideline
Inspect rear shocks for leaks and damping

Rear suspension and frame

Guideline
Lubricate control cables and lever pivots

Controls and cables

Guideline
Lubricate speedometer / tachometer cables, check drive

Controls and cables

Guideline

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

Every 10,000 km or 12 months

14 items

Cooling system (inspect)

Engine

Factory

Factory: Periodic Maintenance Schedule (owner manual pp.53-54): every 10,000 km, and at the annual service. Columns as printed: 1,000 km; 10,000 km; 20,000 km; 30,000 km; 40,000 km; annual service. For higher readings repeat at the same frequency. Key: I inspect or adjust, C clean, R replace, L lubricate. * service more often in severe conditions; # service annually or at the odometer interval, whichever comes first.
Electrical system (inspect)

Engine

Factory

Factory: Periodic Maintenance Schedule (owner manual pp.53-54): five inspection marks across the columns (page 54); marked for annual service or odometer interval, whichever comes first. Columns as printed: 1,000 km; 10,000 km; 20,000 km; 30,000 km; 40,000 km; annual service. For higher readings repeat at the same frequency. Key: I inspect or adjust, C clean, R replace, L lubricate. * service more often in severe conditions; # service annually or at the odometer interval, whichever comes first.
Suspension system (inspect)

Engine

Factory

Factory: Periodic Maintenance Schedule (owner manual pp.53-54): every 10,000 km, and at the annual service. Columns as printed: 1,000 km; 10,000 km; 20,000 km; 30,000 km; 40,000 km; annual service. For higher readings repeat at the same frequency. Key: I inspect or adjust, C clean, R replace, L lubricate. * service more often in severe conditions; # service annually or at the odometer interval, whichever comes first.
Fuel hose (inspect)

Fuel and air

Factory

Factory: Periodic Maintenance Schedule (owner manual pp.53-54): at 1,000 km, then every 10,000 km, and at the annual service. Columns as printed: 1,000 km; 10,000 km; 20,000 km; 30,000 km; 40,000 km; annual service. For higher readings repeat at the same frequency. Key: I inspect or adjust, C clean, R replace, L lubricate. * service more often in severe conditions; # service annually or at the odometer interval, whichever comes first.
Fuel system (inspect)

Fuel and air

Factory

Factory: Periodic Maintenance Schedule (owner manual pp.53-54): at 1,000 km, then every 10,000 km, and at the annual service. Columns as printed: 1,000 km; 10,000 km; 20,000 km; 30,000 km; 40,000 km; annual service. For higher readings repeat at the same frequency. Key: I inspect or adjust, C clean, R replace, L lubricate. * service more often in severe conditions; # service annually or at the odometer interval, whichever comes first.
Transmission oil (replace)

Primary and gearbox

Factory

Factory: Periodic Maintenance Schedule (owner manual pp.53-54): at 1,000 km, then every 10,000 km. Columns as printed: 1,000 km; 10,000 km; 20,000 km; 30,000 km; 40,000 km; annual service. For higher readings repeat at the same frequency. Key: I inspect or adjust, C clean, R replace, L lubricate. * service more often in severe conditions; # service annually or at the odometer interval, whichever comes first.
Brake fluid level (inspect)

Brakes

Factory

Factory: Periodic Maintenance Schedule (owner manual pp.53-54): at 1,000 km, then every 10,000 km, and at the annual service. Columns as printed: 1,000 km; 10,000 km; 20,000 km; 30,000 km; 40,000 km; annual service. For higher readings repeat at the same frequency. Key: I inspect or adjust, C clean, R replace, L lubricate. * service more often in severe conditions; # service annually or at the odometer interval, whichever comes first.
Brake light switch operation (inspect)

Brakes

Factory

Factory: Periodic Maintenance Schedule (owner manual pp.53-54): at 1,000 km, then every 10,000 km, and at the annual service. Columns as printed: 1,000 km; 10,000 km; 20,000 km; 30,000 km; 40,000 km; annual service. For higher readings repeat at the same frequency. Key: I inspect or adjust, C clean, R replace, L lubricate. * service more often in severe conditions; # service annually or at the odometer interval, whichever comes first.
Brake operation (inspect)

Brakes

Factory

Factory: Periodic Maintenance Schedule (owner manual pp.53-54): at 1,000 km, then every 10,000 km, and at the annual service. Columns as printed: 1,000 km; 10,000 km; 20,000 km; 30,000 km; 40,000 km; annual service. For higher readings repeat at the same frequency. Key: I inspect or adjust, C clean, R replace, L lubricate. * service more often in severe conditions; # service annually or at the odometer interval, whichever comes first.
Brake system (inspect)

Brakes

Factory

Factory: Periodic Maintenance Schedule (owner manual pp.53-54): at 1,000 km, then every 10,000 km, and at the annual service. Columns as printed: 1,000 km; 10,000 km; 20,000 km; 30,000 km; 40,000 km; annual service. For higher readings repeat at the same frequency. Key: I inspect or adjust, C clean, R replace, L lubricate. * service more often in severe conditions; # service annually or at the odometer interval, whichever comes first.
Tire pressure (inspect)

Wheels and tires

Factory

Factory: Periodic Maintenance Schedule (owner manual pp.53-54): at 1,000 km, then every 10,000 km, and at the annual service. Columns as printed: 1,000 km; 10,000 km; 20,000 km; 30,000 km; 40,000 km; annual service. For higher readings repeat at the same frequency. Key: I inspect or adjust, C clean, R replace, L lubricate. * service more often in severe conditions; # service annually or at the odometer interval, whichever comes first.
Wheels and tires (inspect)

Wheels and tires

Factory

Factory: Periodic Maintenance Schedule (owner manual pp.53-54): at 1,000 km, then every 10,000 km, and at the annual service. Columns as printed: 1,000 km; 10,000 km; 20,000 km; 30,000 km; 40,000 km; annual service. For higher readings repeat at the same frequency. Key: I inspect or adjust, C clean, R replace, L lubricate. * service more often in severe conditions; # service annually or at the odometer interval, whichever comes first.
Evaporative emission control system (inspect)

Controls and cables

Factory

Factory: Periodic Maintenance Schedule (owner manual pp.53-54): every 10,000 km, and at the annual service. Columns as printed: 1,000 km; 10,000 km; 20,000 km; 30,000 km; 40,000 km; annual service. For higher readings repeat at the same frequency. Key: I inspect or adjust, C clean, R replace, L lubricate. * service more often in severe conditions; # service annually or at the odometer interval, whichever comes first.
Throttle control system (inspect)

Controls and cables

Factory

Factory: Periodic Maintenance Schedule (owner manual pp.53-54): at 1,000 km, then every 10,000 km, and at the annual service. Columns as printed: 1,000 km; 10,000 km; 20,000 km; 30,000 km; 40,000 km; annual service. For higher readings repeat at the same frequency. Key: I inspect or adjust, C clean, R replace, L lubricate. * service more often in severe conditions; # service annually or at the odometer interval, whichever comes first.

Every 10,000 km

10 items

Bolts, nuts and fastener condition (inspect)

Engine

Factory

Factory: Periodic Maintenance Schedule (owner manual pp.53-54): five inspection marks across the columns (page 54). Columns as printed: 1,000 km; 10,000 km; 20,000 km; 30,000 km; 40,000 km; annual service. For higher readings repeat at the same frequency. Key: I inspect or adjust, C clean, R replace, L lubricate. * service more often in severe conditions; # service annually or at the odometer interval, whichever comes first.
Coolant level (inspect)

Engine

Factory

Factory: Periodic Maintenance Schedule (owner manual pp.53-54): at 1,000 km, then every 10,000 km. Columns as printed: 1,000 km; 10,000 km; 20,000 km; 30,000 km; 40,000 km; annual service. For higher readings repeat at the same frequency. Key: I inspect or adjust, C clean, R replace, L lubricate. * service more often in severe conditions; # service annually or at the odometer interval, whichever comes first.
Idle speed (inspect/adjust)

Engine

Factory

Factory: Periodic Maintenance Schedule (owner manual pp.53-54): at 1,000 km, then every 10,000 km. Columns as printed: 1,000 km; 10,000 km; 20,000 km; 30,000 km; 40,000 km; annual service. For higher readings repeat at the same frequency. Key: I inspect or adjust, C clean, R replace, L lubricate. * service more often in severe conditions; # service annually or at the odometer interval, whichever comes first.
Spark plug (inspect/replace)

Engine

Factory

Factory: Periodic Maintenance Schedule (owner manual pp.53-54): every 10,000 km. Columns as printed: 1,000 km; 10,000 km; 20,000 km; 30,000 km; 40,000 km; annual service. For higher readings repeat at the same frequency. Key: I inspect or adjust, C clean, R replace, L lubricate. * service more often in severe conditions; # service annually or at the odometer interval, whichever comes first.
Valve clearance (inspect/adjust)

Engine

Factory

Factory: Periodic Maintenance Schedule (owner manual pp.53-54): every 10,000 km. Columns as printed: 1,000 km; 10,000 km; 20,000 km; 30,000 km; 40,000 km; annual service. For higher readings repeat at the same frequency. Key: I inspect or adjust, C clean, R replace, L lubricate. * service more often in severe conditions; # service annually or at the odometer interval, whichever comes first.
Engine air cleaner element (replace)

Fuel and air

Factory

Factory: Periodic Maintenance Schedule (owner manual pp.53-54): every 10,000 km. Columns as printed: 1,000 km; 10,000 km; 20,000 km; 30,000 km; 40,000 km; annual service. For higher readings repeat at the same frequency. Key: I inspect or adjust, C clean, R replace, L lubricate. * service more often in severe conditions; # service annually or at the odometer interval, whichever comes first.
Steering stem bearings (inspect; lubricate)

Front end

Factory

Factory: Periodic Maintenance Schedule (owner manual pp.53-54): inspect at 10,000 and 30,000 km; lubricate at 20,000 and 40,000 km. Columns as printed: 1,000 km; 10,000 km; 20,000 km; 30,000 km; 40,000 km; annual service. For higher readings repeat at the same frequency. Key: I inspect or adjust, C clean, R replace, L lubricate. * service more often in severe conditions; # service annually or at the odometer interval, whichever comes first.
Brake pad wear (inspect)

Brakes

Factory

Factory: Periodic Maintenance Schedule (owner manual pp.53-54): every 10,000 km. Columns as printed: 1,000 km; 10,000 km; 20,000 km; 30,000 km; 40,000 km; annual service. For higher readings repeat at the same frequency. Key: I inspect or adjust, C clean, R replace, L lubricate. * service more often in severe conditions; # service annually or at the odometer interval, whichever comes first.
Wheel bearings (inspect)

Wheels and tires

Factory

Factory: Periodic Maintenance Schedule (owner manual pp.53-54): every 10,000 km. Columns as printed: 1,000 km; 10,000 km; 20,000 km; 30,000 km; 40,000 km; annual service. For higher readings repeat at the same frequency. Key: I inspect or adjust, C clean, R replace, L lubricate. * service more often in severe conditions; # service annually or at the odometer interval, whichever comes first.
Pivots and cables (lubricate)

Controls and cables

Factory

Factory: Periodic Maintenance Schedule (owner manual pp.53-54): every 10,000 km. Columns as printed: 1,000 km; 10,000 km; 20,000 km; 30,000 km; 40,000 km; annual service. For higher readings repeat at the same frequency. Key: I inspect or adjust, C clean, R replace, L lubricate. * service more often in severe conditions; # service annually or at the odometer interval, whichever comes first.

Every 13,000 km or 2 years

1 item

Check and adjust valve clearances

Engine

Guideline

Every 16,000 km or 2 years

2 items

Compression test (or leak-down)

Engine

Guideline
Change gearbox oil

Primary and gearbox

Guideline

Every 19,500 km or 2 years

3 items

Replace air filter element

Fuel and air

Guideline
Synchronize throttle bodies

Fuel and air

Guideline
Grease swingarm pivot

Rear suspension and frame

Guideline

Every 19,500 km or 3 years

1 item

Replace CVT drive belt

Final drive

Guideline

Typical scooter interval, or sooner if the belt is cracked, glazed or below its width limit.

Every 20,000 km or 12 months

1 item

Engine oil filter (replace)

Engine

Factory

Factory: Periodic Maintenance Schedule (owner manual pp.53-54): at 1,000 km, 10,000 km and 30,000 km (every 20,000 km after the 10,000 km service). Columns as printed: 1,000 km; 10,000 km; 20,000 km; 30,000 km; 40,000 km; annual service. For higher readings repeat at the same frequency. Key: I inspect or adjust, C clean, R replace, L lubricate. * service more often in severe conditions; # service annually or at the odometer interval, whichever comes first.

Every 20,000 km

3 items

CVT system: rollers, shafts, drive pulley cushion (inspect/lubricate/replace)

Engine

Factory

Factory: Periodic Maintenance Schedule (owner manual pp.53-54): every 20,000 km. Columns as printed: 1,000 km; 10,000 km; 20,000 km; 30,000 km; 40,000 km; annual service. For higher readings repeat at the same frequency. Key: I inspect or adjust, C clean, R replace, L lubricate. * service more often in severe conditions; # service annually or at the odometer interval, whichever comes first.
V-belt (replace)

Engine

Factory

Factory: Periodic Maintenance Schedule (owner manual pp.53-54): every 20,000 km. Columns as printed: 1,000 km; 10,000 km; 20,000 km; 30,000 km; 40,000 km; annual service. For higher readings repeat at the same frequency. Key: I inspect or adjust, C clean, R replace, L lubricate. * service more often in severe conditions; # service annually or at the odometer interval, whichever comes first.
V-belt case air cleaner element (inspect/replace)

Fuel and air

Factory

Factory: Periodic Maintenance Schedule (owner manual pp.53-54): every 20,000 km. Columns as printed: 1,000 km; 10,000 km; 20,000 km; 30,000 km; 40,000 km; annual service. For higher readings repeat at the same frequency. Key: I inspect or adjust, C clean, R replace, L lubricate. * service more often in severe conditions; # service annually or at the odometer interval, whichever comes first.

Every 24,000 km or 3 years

1 item

Change fork oil

Front end

Guideline

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

Every 24,000 km

1 item

Replace brake linings / skim drums (wear based)

Brakes

Guideline

Every 25,500 km or 4 years

1 item

Replace spark plugs

Engine

Guideline

Every 30,000 km or 2 years

1 item

Brake fluid (replace)

Brakes

Factory

Factory: Periodic Maintenance Schedule (owner manual pp.53-54): every 2 years or every 30,000 km; inspect at the annual service. Columns as printed: 1,000 km; 10,000 km; 20,000 km; 30,000 km; 40,000 km; annual service. For higher readings repeat at the same frequency. Key: I inspect or adjust, C clean, R replace, L lubricate. * service more often in severe conditions; # service annually or at the odometer interval, whichever comes first.

Every 32,000 km 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 38,500 km or 4 years

1 item

Replace fuel filter

Fuel and air

Guideline

Every 40,000 km or 6 years

1 item

Replace swingarm bushes / bearings

Rear suspension and frame

Guideline

Every 48,500 km or 6 years

1 item

Rebuild forks: seals, bushes, springs

Front end

Guideline

Every 60,000 km or 4 years

1 item

Brake hoses (replace)

Brakes

Factory

Factory: Periodic Maintenance Schedule (owner manual pp.53-54): every 4 years or every 60,000 km; inspect at the annual service. Columns as printed: 1,000 km; 10,000 km; 20,000 km; 30,000 km; 40,000 km; annual service. For higher readings repeat at the same frequency. Key: I inspect or adjust, C clean, R replace, L lubricate. * service more often in severe conditions; # service annually or at the odometer interval, whichever comes first.

Every 6 months

1 item

Clean battery terminals, check charge and strap

Ignition and electrics

Guideline

Every 2 years

4 items

Replace coolant

Engine

Guideline
Inspect wiring, bullet connectors and ground points

Ignition and electrics

Guideline
Inspect frame, welds and lugs for cracks

Rear suspension and frame

Guideline
Replace brake fluid

Brakes

Guideline

Every 3 years

1 item

Coolant, water hoses and O-rings (replace)

Engine

Factory

Factory: Periodic Maintenance Schedule (owner manual pp.53-54): every 3 years; inspect at the annual service. Columns as printed: 1,000 km; 10,000 km; 20,000 km; 30,000 km; 40,000 km; annual service. For higher readings repeat at the same frequency. Key: I inspect or adjust, C clean, R replace, L lubricate. * service more often in severe conditions; # service annually or at the odometer interval, whichever comes first.

Every 4 years

3 items

Replace fuel lines

Fuel and air

Guideline

Old rubber and modern ethanol fuel do not mix well.
Inspect brake hoses; replace old rubber

Brakes

Guideline
Rebuild calipers and master cylinders (seals)

Brakes

Guideline

Every 6 years

2 items

Replace inner tubes and rim tape with tires

Wheels and tires

Guideline
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.