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Sherco · Shim-adjusted overhead-cam four-stroke single, dry sump, gearbox shares engine oil, chain drive

SE 450

Library entry covers 2009-2025

55 factory 50 guideline

Published source

Sherco 450-500 SEF 2024 Owner's Manual, Maintenance schedule pp.139-141 (English section)

Factory owner's handbook. Covers 2024 Sherco 450-500 SEF owner manual (the manual calls the bike the 450 SEF); other years not compared.

105 items for a 2022 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: Dry sump (separate oil tank)
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: Fuel injection
Cooling: Liquid 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, single shock / cantilever
Front brake: Disc, hydraulic
Rear brake: Disc, hydraulic
Wheels: Cast / alloy, tubeless
Sidecar: No sidecar

Maintenance schedule

2022 Sherco SE 450

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 500 mi

1 item

Check coolant level

Pre-ride / on the road

Guideline

On the road: every 600 mi

1 item

Check chain slack and rear wheel alignment

Pre-ride / on the road

Guideline

Every 1,000 mi or 6 months

1 item

Inspect tire tread, sidewalls and date codes

Wheels and tires

Guideline

Every 3,000 mi or 12 months

9 items

Check throttle cable(s) free play and return

Fuel and air

Guideline
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.
Inspect chain and sprockets for wear (measure stretch)

Final drive

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 wheel bearings for play

Wheels and tires

Guideline

Every 4,000 mi or 12 months

2 items

Inspect, clean and gap spark plugs

Engine

Guideline
Adjust clutch free play, lubricate cable and lever pivot

Primary and gearbox

Guideline

Every 5,000 mi 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 6,000 mi 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 mi or 2 years

1 item

Compression test (or leak-down)

Engine

Guideline

Every 12,000 mi or 2 years

4 items

Replace air filter element

Fuel and air

Guideline
Synchronize throttle bodies

Fuel and air

Guideline
Clean and grease rear suspension linkage

Rear suspension and frame

Guideline
Grease swingarm pivot

Rear suspension and frame

Guideline

Every 15,000 mi 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 15,000 mi or 4 years

1 item

Check valve clearances (shim adjusted)

Engine

Guideline

Every 16,000 mi or 4 years

1 item

Replace spark plugs

Engine

Guideline

Every 18,000 mi

1 item

Replace chain and sprockets (wear based)

Final drive

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 24,000 mi or 4 years

1 item

Replace fuel filter

Fuel and air

Guideline

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 20 h

39 items

Bolts and screws (check tightness)

Engine

Factory

Factory: Maintenance schedule (p.139): after 5 hours, then every 20 hours. In competition, do the 20 hour schedule after each race; it should not be exceeded by more than 2 hours. Check screw tightness after the first ride or first hours of use.
Camshafts, cups and valve guides (check wear, sand competition use)

Engine

Factory

Factory: Maintenance schedule (p.141), important checks and work by a Sherco workshop for sand competition use: every 20 hours.
Connecting rod (replace, sand competition use)

Engine

Factory

Factory: Maintenance schedule (p.141), important checks and work by a Sherco workshop for sand competition use: every 20, 30 and 50 hours.
Cooling system (check for leaks)

Engine

Factory

Factory: Maintenance schedule (p.139): after 5 hours, then every 20 hours. In competition, do the 20 hour schedule after each race; it should not be exceeded by more than 2 hours. Check screw tightness after the first ride or first hours of use.
Crankshaft bearings (replace, sand competition use)

Engine

Factory

Factory: Maintenance schedule (p.141), important checks and work by a Sherco workshop for sand competition use: every 20, 30 and 50 hours.
Crankshaft end run-out (check, sand competition use)

Engine

Factory

Factory: Maintenance schedule (p.141), important checks and work by a Sherco workshop for sand competition use: every 20, 30 and 50 hours.
Cylinder wear (check, sand competition use)

Engine

Factory

Factory: Maintenance schedule (p.141), important checks and work by a Sherco workshop for sand competition use: every 20 hours.
ECU errors (check with Sherco diagnostic tool, sand competition use)

Engine

Factory

Factory: Maintenance schedule (p.141), important checks and work by a Sherco workshop for sand competition use: every race, every 20, 30 and 50 hours.
Electrical components (check function)

Engine

Factory

Factory: Maintenance schedule (p.139): headlight, tail, stop, turn signals, computer control unit and so on, after 5 hours, then every 20 hours. In competition, do the 20 hour schedule after each race; it should not be exceeded by more than 2 hours. Check screw tightness after the first ride or first hours of use.
Engine mounting bolts (check)

Engine

Factory

Factory: Maintenance schedule (p.139): after 5 hours, then every 20 hours. In competition, do the 20 hour schedule after each race; it should not be exceeded by more than 2 hours. Check screw tightness after the first ride or first hours of use.
Engine oil, filter and pre-filter (change)

Engine

Factory

Factory: Maintenance schedule (p.139): change engine oil and filter, clean the pre-filter and change it if necessary, after 5 hours, then every 20 hours. In competition, do the 20 hour schedule after each race; it should not be exceeded by more than 2 hours. Check screw tightness after the first ride or first hours of use.
Exhaust (check sealing and mounting)

Engine

Factory

Factory: Maintenance schedule (p.139): after 5 hours, then every 20 hours. In competition, do the 20 hour schedule after each race; it should not be exceeded by more than 2 hours. Check screw tightness after the first ride or first hours of use.
Injection body and stepper (clean, sand competition use)

Engine

Factory

Factory: Maintenance schedule (p.141), important checks and work by a Sherco workshop for sand competition use: every race, every 20, 30 and 50 hours.
Magnetic drain plug (clean)

Engine

Factory

Factory: Maintenance schedule (p.139): after 5 hours, then every 20 hours. In competition, do the 20 hour schedule after each race; it should not be exceeded by more than 2 hours. Check screw tightness after the first ride or first hours of use.
Piston (replace, sand competition use)

Engine

Factory

Factory: Maintenance schedule (p.141), important checks and work by a Sherco workshop for sand competition use: every 20 hours.
Throttle body venturi (clean)

Engine

Factory

Factory: Maintenance schedule (p.139): every 20 hours. In competition, do the 20 hour schedule after each race; it should not be exceeded by more than 2 hours. Check screw tightness after the first ride or first hours of use.
Valve clearance (check, adjust)

Engine

Factory

Factory: Maintenance schedule (p.139): after 5 hours, then every 20 hours. In competition, do the 20 hour schedule after each race; it should not be exceeded by more than 2 hours. Check screw tightness after the first ride or first hours of use.
Valve clearance (check, sand competition use)

Engine

Factory

Factory: Maintenance schedule (p.141), important checks and work by a Sherco workshop for sand competition use: every 20 hours and every 50 hours.
Air filter and housing (clean)

Fuel and air

Factory

Factory: Maintenance schedule (p.139): after 5 hours, then every 20 hours. In competition, do the 20 hour schedule after each race; it should not be exceeded by more than 2 hours. Check screw tightness after the first ride or first hours of use.
Clutch discs wear (check, sand competition use)

Primary and gearbox

Factory

Factory: Maintenance schedule (p.141), important checks and work by a Sherco workshop for sand competition use: every race and every 20 hours.
Clutch master cylinder oil level (check)

Primary and gearbox

Factory

Factory: Maintenance schedule (p.139): after 5 hours, then every 20 hours. In competition, do the 20 hour schedule after each race; it should not be exceeded by more than 2 hours. Check screw tightness after the first ride or first hours of use.
Clutch nut and clutch bell (check for marks, sand competition use)

Primary and gearbox

Factory

Factory: Maintenance schedule (p.141), important checks and work by a Sherco workshop for sand competition use: every 20 hours.
Clutch spring length (check, sand competition use)

Primary and gearbox

Factory

Factory: Maintenance schedule (p.141), important checks and work by a Sherco workshop for sand competition use: every race and every 20 hours.
Chain (lubricate)

Final drive

Factory

Factory: Maintenance schedule (p.139): after 5 hours, then every 20 hours. In competition, do the 20 hour schedule after each race; it should not be exceeded by more than 2 hours. Check screw tightness after the first ride or first hours of use.
Chain, sprockets, guides and tension (check)

Final drive

Factory

Factory: Maintenance schedule (p.139): after 5 hours, then every 20 hours. In competition, do the 20 hour schedule after each race; it should not be exceeded by more than 2 hours. Check screw tightness after the first ride or first hours of use.
Timing chain length (check, sand competition use)

Final drive

Factory

Factory: Maintenance schedule (p.141), important checks and work by a Sherco workshop for sand competition use: every 20 hours.
Timing chain tensioner (check operation, sand competition use)

Final drive

Factory

Factory: Maintenance schedule (p.141), important checks and work by a Sherco workshop for sand competition use: every race, every 20 hours and every 50 hours.
Fork and shock (check for leaks and function)

Front end

Factory

Factory: Maintenance schedule (p.139): after 5 hours, then every 20 hours. In competition, do the 20 hour schedule after each race; it should not be exceeded by more than 2 hours. Check screw tightness after the first ride or first hours of use.
Fork dust covers (clean)

Front end

Factory

Factory: Maintenance schedule (p.139): after 5 hours, then every 20 hours. In competition, do the 20 hour schedule after each race; it should not be exceeded by more than 2 hours. Check screw tightness after the first ride or first hours of use.
Fork legs (purge air)

Front end

Factory

Factory: Maintenance schedule (p.139): after 5 hours, then every 20 hours. In competition, do the 20 hour schedule after each race; it should not be exceeded by more than 2 hours. Check screw tightness after the first ride or first hours of use.
Steering head bearings (check, adjust)

Front end

Factory

Factory: Maintenance schedule (p.139): after 5 hours, then every 20 hours. In competition, do the 20 hour schedule after each race; it should not be exceeded by more than 2 hours. Check screw tightness after the first ride or first hours of use.
Brake fluid level, pad thickness and discs (check)

Brakes

Factory

Factory: Maintenance schedule (p.139): after 5 hours, then every 20 hours. In competition, do the 20 hour schedule after each race; it should not be exceeded by more than 2 hours. Check screw tightness after the first ride or first hours of use.
Brake lines (check)

Brakes

Factory

Factory: Maintenance schedule (p.139): check condition and sealing after 5 hours, then every 20 hours. In competition, do the 20 hour schedule after each race; it should not be exceeded by more than 2 hours. Check screw tightness after the first ride or first hours of use.
Brake pedal and hand lever (check)

Brakes

Factory

Factory: Maintenance schedule (p.139): after 5 hours, then every 20 hours. In competition, do the 20 hour schedule after each race; it should not be exceeded by more than 2 hours. Check screw tightness after the first ride or first hours of use.
Brake system fasteners and discs (check tightness)

Brakes

Factory

Factory: Maintenance schedule (p.139): after 5 hours, then every 20 hours. In competition, do the 20 hour schedule after each race; it should not be exceeded by more than 2 hours. Check screw tightness after the first ride or first hours of use.
Rims and spoke tension (check)

Wheels and tires

Factory

Factory: Maintenance schedule (p.139): after 5 hours, then every 20 hours. In competition, do the 20 hour schedule after each race; it should not be exceeded by more than 2 hours. Check screw tightness after the first ride or first hours of use.
Tires and tire pressure (check)

Wheels and tires

Factory

Factory: Maintenance schedule (p.139): after 5 hours, then every 20 hours. In competition, do the 20 hour schedule after each race; it should not be exceeded by more than 2 hours. Check screw tightness after the first ride or first hours of use.
Wheel bearing clearance (check)

Wheels and tires

Factory

Factory: Maintenance schedule (p.139): after 5 hours, then every 20 hours. In competition, do the 20 hour schedule after each race; it should not be exceeded by more than 2 hours. Check screw tightness after the first ride or first hours of use.
Cables (check, adjust, lubricate)

Controls and cables

Factory

Factory: Maintenance schedule (p.139): check condition, flexibility and position, adjust and lubricate, after 5 hours, then every 20 hours. In competition, do the 20 hour schedule after each race; it should not be exceeded by more than 2 hours. Check screw tightness after the first ride or first hours of use.

Every 30 h

3 items

Camshaft bearings (check, sand competition use)

Engine

Factory

Factory: Maintenance schedule (p.141), important checks and work by a Sherco workshop for sand competition use: every 30 hours.
Oil pumps (check, sand competition use)

Engine

Factory

Factory: Maintenance schedule (p.141), important checks and work by a Sherco workshop for sand competition use: every 30 hours.
Gearbox wear: gears, bearings, forks (check, sand competition use)

Front end

Factory

Factory: Maintenance schedule (p.141), important checks and work by a Sherco workshop for sand competition use: every 30 and 50 hours.

Every 50 h

2 items

Spark plug (replace)

Engine

Factory

Factory: Maintenance schedule (p.139): replace spark plug (after 50 hours); no column is marked. In competition, do the 20 hour schedule after each race; it should not be exceeded by more than 2 hours. Check screw tightness after the first ride or first hours of use.
Valves and valve springs (replace, sand competition use)

Engine

Factory

Factory: Maintenance schedule (p.141), important checks and work by a Sherco workshop for sand competition use: every 50 hours.

Every 6 months

1 item

Clean battery terminals, check charge and strap

Ignition and electrics

Guideline

Every 12 months

6 items

Muffler fiberglass (replace)

Engine

Factory

Factory: Maintenance schedule (p.140): at least once a year, by the dealer. In competition, do the 20 hour schedule after each race; it should not be exceeded by more than 2 hours. Check screw tightness after the first ride or first hours of use.
Electric contacts and switches (treat with protector)

Ignition and electrics

Factory

Factory: Maintenance schedule (p.140): at least once a year, by the dealer. In competition, do the 20 hour schedule after each race; it should not be exceeded by more than 2 hours. Check screw tightness after the first ride or first hours of use.
Fork (dealer service)

Front end

Factory

Factory: Maintenance schedule (p.140): at least once a year, by the dealer. In competition, do the 20 hour schedule after each race; it should not be exceeded by more than 2 hours. Check screw tightness after the first ride or first hours of use.
Steering head bearings and seals (clean, grease)

Front end

Factory

Factory: Maintenance schedule (p.140): at least once a year, by the dealer. In competition, do the 20 hour schedule after each race; it should not be exceeded by more than 2 hours. Check screw tightness after the first ride or first hours of use.
Shock (dealer service)

Rear suspension and frame

Factory

Factory: Maintenance schedule (p.140): at least once a year, by the dealer. In competition, do the 20 hour schedule after each race; it should not be exceeded by more than 2 hours. Check screw tightness after the first ride or first hours of use.
Brake fluid (replace)

Brakes

Factory

Factory: Maintenance schedule (p.140): at least once a year, by the dealer. In competition, do the 20 hour schedule after each race; it should not be exceeded by more than 2 hours. Check screw tightness after the first ride or first hours of use.

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 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

1 item

Replace tires on age (regardless of tread)

Wheels and tires

Guideline

No interval set

5 items

Exhaust muffler rock wool (replace, sand competition use)

Engine

Factory

Factory: Maintenance schedule (p.141), important checks and work by a Sherco workshop for sand competition use: every race.
Rider checks before each use

Engine

Factory

Factory: Maintenance schedule (p.140), checks by the rider before each use: engine oil level, brake fluid level, brake pad condition, lights, horn, tires and tire pressure, coolant level, fuel lines for leaks, all controls, brakes. In competition, do the 20 hour schedule after each race; it should not be exceeded by more than 2 hours. Check screw tightness after the first ride or first hours of use.
Rider maintenance after each use

Engine

Factory

Factory: Maintenance schedule (p.140), by the rider after each use: lubricate the throttle cable, purge air from the fork legs, clean the fork dust seals, clean and lubricate the chain and check and adjust tension, clean the air filter and box, check the brakes, spray anti-corrosion protector on unpainted parts (not brake parts or exhaust), spray protector on electrical switches, check tightness of nuts, screws and clamps. In competition, do the 20 hour schedule after each race; it should not be exceeded by more than 2 hours. Check screw tightness after the first ride or first hours of use.
Fuel pressure (check, sand competition use)

Fuel and air

Factory

Factory: Maintenance schedule (p.141), important checks and work by a Sherco workshop for sand competition use: every race.
Battery (check, charge, sand competition use)

Ignition and electrics

Factory

Factory: Maintenance schedule (p.141), important checks and work by a Sherco workshop for sand competition use: every race.

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.