Model Maintenance Schedule
Sherco 300 SEF Maintenance Schedule
The Sherco 300 SEF is a 300cc 4-stroke enduro bike. These are the maintenance intervals from Sherco's 2026 owner's manual for the 250 and 300 SEF, in engine hours.
Key Intervals At A Glance
- Oil: Engine oil and filter, pre-filter: change oil and filter; clean pre-filter, change if necessary, after 5 hours, then every 20 hours.
- Air filter: Air filter and housing: clean, after 5 hours, then every 20 hours; also after each use.
- Valve clearance: Valve clearances: check and adjust, after 5 hours, then every 20 hours.
- Top end: Piston: replace at workshop service, competition 40 hours and 80 hours; recreational 80 hours.
- Fork: Fork service: dealer service, at least once a year.
How The Sherco Schedule Works
Sherco's manual has three tables: a maintenance schedule with columns for after 5 hours and every 20 hours, an annual maintenance list split into dealer jobs and before and after each use checks, and a workshop table for engine wear parts with separate competition and recreational columns.
Sherco 300 SEF Service Intervals By Hours
The table below lists the core service items from the maintenance schedule in the Sherco 250-300 SEF 2026 Owner's Manual (multilingual FR/EN/ES/DE). Task wording follows the manual. Where the manual gives both an hour and a calendar interval, do the work at whichever comes first.
| Service task | Interval | First service |
|---|---|---|
| Engine oil and filter, pre-filter: change oil and filter; clean pre-filter, change if necessary | After 5 hours, then every 20 hours | 5 hours |
| Magnetic drain plug: clean | After 5 hours, then every 20 hours | 5 hours |
| Spark plug: replace | After 50 hours | None listed |
| Valve clearances: check and adjust | After 5 hours, then every 20 hours | 5 hours |
| Engine mounting bolts: check tightness | After 5 hours, then every 20 hours | 5 hours |
| Venturi (injection): clean | Every 20 hours | None listed |
| Cooling system: check for leaks | After 5 hours, then every 20 hours | 5 hours |
| Exhaust sealing and attachment: check | After 5 hours, then every 20 hours | 5 hours |
| Cables: check, adjust, lubricate | After 5 hours, then every 20 hours | 5 hours |
| Clutch master cylinder oil level: check | After 5 hours, then every 20 hours | 5 hours |
| Air filter and housing: clean | After 5 hours, then every 20 hours; also after each use | 5 hours |
| Electric components and wiring: check function | After 5 hours, then every 20 hours | 5 hours |
| Brakes: fluid level, pads, discs, lines, levers, fasteners: check | After 5 hours, then every 20 hours | 5 hours |
| Fork and shock: check for leaks and function | After 5 hours, then every 20 hours | 5 hours |
| Fork dust covers: clean | After 5 hours, then every 20 hours; also after each use | 5 hours |
| Fork air bleed: purge air | Every 5 to 10 hours (chassis section), after 5 hours then every 20 hours (schedule), after each use | 5 hours |
| Bolts and screws general tightness: check | After 5 hours, then every 20 hours; after each use | 5 hours |
| Steering head bearings: check/adjust | After 5 hours, then every 20 hours | 5 hours |
| Rims and spoke tension: check | After 5 hours, then every 20 hours | 5 hours |
| Tires and pressure: check | After 5 hours, then every 20 hours; before each use | 5 hours |
| Chain, sprockets, guides, chain tension: check | After 5 hours, then every 20 hours | 5 hours |
| Chain: lubricate | After 5 hours, then every 20 hours; clean and lubricate after each use | 5 hours |
| Wheel bearings: check clearance | After 5 hours, then every 20 hours | 5 hours |
| Fork service: dealer service | At least once a year | None listed |
| Shock service: dealer service | At least once a year | None listed |
| Steering head bearings and seals: clean and grease | At least once a year | None listed |
| Muffler fiberglass packing: replace | At least once a year (dealer); the workshop table also marks it at 10, 20, 40 and 80 hours for competition and 20, 40 and 80 hours for recreational use | 10 hours (competition) / 20 hours (recreational) |
| Brake fluid: replace | At least once a year | None listed |
| Engine oil level: check | Before each use | None listed |
| Coolant level: check | Before each use | None listed |
| Clutch disc wear / clutch spring length: check at workshop service | Competition 20 hours, 40 hours, 80 hours; recreational 40 hours, 80 hours | None listed |
| Piston: replace at workshop service | Competition 40 hours and 80 hours; recreational 80 hours | None listed |
| Cylinder/piston, piston pin, camshafts, cam buckets, valve guides, crank run-out, conrod condition, gearbox, relief valve spring, cam chain length: check at workshop service | Competition 40 hours and 80 hours; recreational 80 hours | None listed |
| Big end bearing and crankshaft bearings: replace at workshop service | Competition 40 hours and 80 hours; recreational 80 hours | None listed |
| Valves: replace at workshop service | 80 hours | None listed |
| Timing chain tensioner guide: check operation at workshop service | 80 hours | None listed |
| Connecting rod kit: replace at workshop service | Competition 80 hours, recreational 120 hours (as printed) | None listed |
The manual is the authority. Check the edition for your exact model year before ordering parts, and shorten intervals for mud, sand, heat or heavy loads.
Fluids And Capacities
| Item | Specification |
|---|---|
| Engine oil | 1 L SAE 10W40 (Motorex Top Speed 4T) |
| Coolant | approx. 1.1 L, Motorex Coolant M3.0 |
| Fork oil | KAYABA 01M, 345 cc per leg; oil level 120 mm (Racing open cartridge) |
| Shock oil | KAYABA K2C |
| Brake fluid | DOT 4 (Motorex Brake Fluid Dot 4) |
| Spark plug | NGK CR8EK, gap 0.7 mm |
| Fuel tank | 9.7 L with 1 L reserve |
Ownership Notes
The core schedule is simple: a first service after 5 hours, then engine oil and filter, air filter, valve clearance and chain checks every 20 hours. Fork and shock service, brake fluid and muffler packing are dealer jobs at least once a year.
The workshop table in the manual is laid out for competition and recreational use with different hour columns. As printed, the piston is replaced at 40 and 80 hours for competition use and at 80 hours for recreational use. The table header is hard to read, so confirm workshop intervals with your Sherco dealer. The manual does not print a coolant replacement interval.
Track The Sherco 300 SEF Schedule Automatically
MotoMind tracks these intervals automatically by engine hours. Add your Sherco 300 SEF to the garage, set each task to the interval in the table above, and update hours from your hour meter or the GPS ride tracker. Every task then shows as upcoming, due now or overdue, and your completed service builds a history you can export as a PDF when you sell the bike.
More Model Schedules
Browse every model in the maintenance schedules hub.
FAQ
How often should I change the engine oil on a Sherco 300 SEF?
The 2026 Sherco owner's manual lists engine oil and filter, pre-filter (change oil and filter; clean pre-filter, change if necessary) on this interval: after 5 hours, then every 20 hours. Ride in mud, sand or heat, or race hard, and shorten the interval.
When does a Sherco 300 SEF need a new piston?
The 2026 Sherco owner's manual lists piston (replace at workshop service) on this interval: competition 40 hours and 80 hours; recreational 80 hours. Track engine hours closely so the top end is replaced on schedule rather than after a failure.
How often should I check the valve clearance on a Sherco 300 SEF?
The 2026 Sherco owner's manual lists valve clearances (check and adjust) on this interval: after 5 hours, then every 20 hours.
How often should I clean the air filter on a Sherco 300 SEF?
The 2026 Sherco owner's manual lists air filter and housing (clean) on this interval: after 5 hours, then every 20 hours; also after each use. In dusty or sandy conditions, inspect it after every ride.
How often does the Sherco 300 SEF suspension need service?
The 2026 Sherco owner's manual lists fork service (dealer service) on this interval: at least once a year.
Can an app track the Sherco 300 SEF maintenance schedule for me?
Yes. MotoMind tracks these intervals automatically by engine hours. Enter your Sherco 300 SEF's hours or log rides with the GPS ride tracker, set the intervals from this table, and MotoMind shows what is upcoming, due or overdue.
Track The Sherco 300 SEF By Engine Hours
MotoMind tracks these intervals automatically by engine hours, so your Sherco 300 SEF gets oil, filters, top end and suspension service on time.
