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Sherco · Two-stroke single, premix, chain drive

ST 125

Library entry covers 2009-2024

47 factory 50 guideline

Published source

Sherco Owner's Manual 125-250-300 ST, Maintenance schedule pp.73-74 (sherco.com)

Factory source. Covers Sherco Owner's Manual 125-250-300 ST (official sherco.com PDF; file name says 2022, no year printed in the manual pages read).

97 items for a 2012 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
Two-stroke
Engine lubrication
Two-stroke premix (oil in fuel)
Oil filtration
None (no filter)
Valve gear
None (two-stroke porting)
Ignition
Electronic (CDI / transistor / ECU)
Charging
Alternator / stator with rectifier
Battery
Wet cell (flooded lead-acid, needs topping up)
Fuel system
Single carburetor
Cooling
Liquid cooled
Primary drive
Gear or chain inside engine, shares engine oil
Gearbox oil
Separate gearbox oil
Clutch control
Hand lever, hydraulic
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

2012 Sherco ST 125

On the road: every 150 mi

1 item
  • Check two-stroke oil tank / carry premix oil
    Pre-ride / on the road
    Guideline

    Running a two-stroke out of oil seizes it. Injection bikes: check the tank. Premix: carry oil and a measure.

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 2,000 mi or 12 months

1 item
  • Replace spark plugs (two-stroke)
    Engine
    Guideline

Every 3,000 mi or 12 months

10 items
  • Check throttle cable(s) free play and return
    Fuel and air
    Guideline
  • Clean fuel tap filter / sediment bowl
    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 3,000 mi or 2 years

1 item
  • Decarbonize exhaust ports, pipes and baffles
    Engine
    Guideline

    Two-strokes coke up the exhaust port and muffler baffles; power falls off gradually.

Every 4,000 mi or 12 months

1 item
  • Inspect, clean and gap spark plugs
    Engine
    Guideline

Every 6,000 mi or 12 months

8 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.

  • 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
  • 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

2 items
  • Compression test (or leak-down)
    Engine
    Guideline
  • Change gearbox oil
    Primary and gearbox
    Guideline

Every 12,000 mi or 2 years

3 items
  • Replace air filter element
    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 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 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

38 items
  • All tubes and dust cover (inspect for cracks or leaks)
    Engine
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: every 20 hours; every 60 hours; every 100 hours; after each ride. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Coolant level (check)
    Engine
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: after 3 hours; every 20 hours; every 60 hours; every 100 hours; after each ride. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Flap valve (check)
    Engine
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: every 20 hours; every 60 hours; every 100 hours. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Headlight adjustment (check)
    Engine
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: every 20 hours; every 60 hours; every 100 hours. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Idle speed (check)
    Engine
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: every 20 hours; every 60 hours; every 100 hours; after each ride. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Interference filter (check)
    Engine
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: every 20 hours; every 60 hours; every 100 hours. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Nuts and bolts (check tightness)
    Engine
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: after 3 hours; every 20 hours; every 60 hours; every 100 hours; after each ride. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Rims (check that they are not bent)
    Engine
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: every 20 hours; every 60 hours; every 100 hours; after each ride. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Spark plug (check)
    Engine
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: every 20 hours; every 60 hours; every 100 hours. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Suspension rods (check for slack)
    Engine
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: every 20 hours; every 60 hours; every 100 hours; after each ride. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Throttle grip play (check)
    Engine
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: after 3 hours; every 20 hours; every 60 hours; every 100 hours; after each ride. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Wires (check for damage or kinks)
    Engine
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: every 20 hours; every 60 hours; every 100 hours; after each ride. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Air filter and air filter housing (clean)
    Fuel and air
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: every 20 hours; every 60 hours; every 100 hours; after each ride. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Clutch (check)
    Primary and gearbox
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: every 20 hours; every 60 hours; every 100 hours; after each ride. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Clutch fluid level (check)
    Primary and gearbox
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: every 20 hours; every 60 hours; every 100 hours; after each ride. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Gearbox oil (replace)
    Primary and gearbox
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: after 3 hours; every 20 hours; every 60 hours; every 100 hours; after each ride. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Chain tension (check)
    Final drive
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: after 3 hours; every 20 hours; every 60 hours; every 100 hours; after each ride. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Final drive, chain, sprocket, pinion and chain guide (check)
    Final drive
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: every 20 hours; every 60 hours; every 100 hours; after each ride. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Fork (maintenance)
    Front end
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: every 20 hours; every 60 hours. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Steering column (check for slack)
    Front end
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: after 3 hours; every 20 hours; every 60 hours; every 100 hours. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Frame (check)
    Rear suspension and frame
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: every 20 hours; every 60 hours; every 100 hours; after each ride. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Shock absorber (check leak tightness)
    Rear suspension and frame
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: every 20 hours; every 60 hours; every 100 hours. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Shock absorber attachments (check)
    Rear suspension and frame
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: after 3 hours; every 20 hours; every 60 hours; every 100 hours; after each ride. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Swingarm (check)
    Rear suspension and frame
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: every 20 hours; every 60 hours; every 100 hours; after each ride. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Swingarm bearings (check for slack)
    Rear suspension and frame
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: every 20 hours; every 60 hours; every 100 hours; after each ride. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Brake fluid level (check)
    Brakes
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: every 20 hours; every 60 hours; every 100 hours; after each ride. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Brake lines (check condition and leak-tightness)
    Brakes
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: every 20 hours; every 60 hours; every 100 hours; after each ride. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Front brake discs (check)
    Brakes
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: every 20 hours; every 60 hours; every 100 hours; after each ride. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Front brake lever free clearance (check; printed as front brake pedal)
    Brakes
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: after 3 hours; every 20 hours; every 60 hours; every 100 hours; after each ride. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Front brake pads (check)
    Brakes
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: every 20 hours; every 60 hours; every 100 hours; after each ride. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Rear brake pads (check)
    Brakes
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: every 20 hours; every 60 hours; every 100 hours; after each ride. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Rear brake pedal free clearance (check)
    Brakes
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: after 3 hours; every 20 hours; every 60 hours; every 100 hours; after each ride. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Spoke tension (check)
    Wheels and tires
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: after 3 hours; every 20 hours; every 60 hours; every 100 hours; after each ride. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Tire condition (check)
    Wheels and tires
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: every 20 hours; every 60 hours; every 100 hours; after each ride. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Tire pressure (check)
    Wheels and tires
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: after 3 hours; every 20 hours; every 60 hours; every 100 hours; after each ride. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Wheel hub slack (check)
    Wheels and tires
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: every 20 hours; every 60 hours; every 100 hours; after each ride. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Wheel hubs (check)
    Wheels and tires
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: every 20 hours; every 60 hours; every 100 hours; after each ride. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Throttle cable condition (check)
    Controls and cables
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: every 20 hours; every 60 hours; every 100 hours; after each ride. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

Every 60 h

1 item
  • Clutch spring (replace)
    Primary and gearbox
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: every 60 hours. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

Every 100 h

1 item
  • Muffler steel wool (replace)
    Engine
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): marked: every 100 hours. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

Every 120 h

1 item
  • Engine maintenance: replace the rod, needle basket, crank pin basket and piston; check the cylinder, gearbox and shifting mechanism; replace all engine bearings
    Primary and gearbox
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): every 120 hours of use, or every 40 hours in competition use. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

Every 6 months

1 item
  • Clean battery terminals, check charge and strap
    Ignition and electrics
    Guideline

Every 12 months

5 items
  • Suspension rod bearings (lubricate)
    Engine
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): every year. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Clutch fluid (replace)
    Primary and gearbox
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): every year (marked in the every year and every 4 years columns). Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Steering column bearings (lubricate)
    Front end
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): every year. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Swingarm bearings (lubricate)
    Rear suspension and frame
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): every year. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • Brake fluid (replace)
    Brakes
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): every year (marked in the every year and every 4 years columns). Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

Every 2 years

5 items
  • Replace coolant
    Engine
    Guideline
  • Inspect wiring, bullet connectors and ground points
    Ignition and electrics
    Guideline
  • Replace hydraulic clutch fluid
    Primary and gearbox
    Guideline
  • Inspect frame, welds and lugs for cracks
    Rear suspension and frame
    Guideline
  • Replace brake fluid
    Brakes
    Guideline

Every 4 years

4 items
  • Coolant (replace)
    Engine
    Factory

    Factory: Maintenance schedule (Sherco Owner's Manual 125-250-300 ST, English section, printed pp.73-74; official sherco.com PDF): every 4 years. Columns as printed, p.73: after 3 hours of use; every 20 hours; every 60 hours; every 100 hours; after each ride. p.74: every 60 hours; every 120 hours; every year; every 4 years; every 40 hours competition use.

  • 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

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.

Keep up with this schedule on your phone

Add the bike in the app and this chart loads itself, ready to log against and edit.

Coming soon to Google Play

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SM 125
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2009-2012
SE 125
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2009-2025
SE 450
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