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Engine & Maintenance

Engine Hours Maintenance Calculator

A practical MX / enduro service calendar from current hours and engine type. Intervals are conservative race-use numbers, not dealer marketing.

Inputs
Results
Live

  • Next oil change in

    2h

  • Top-end interval

    40h

  • Items due within 2 hours

    4

Table
ServiceInterval (h)Hours remainingStatus
Engine / trans oil52On interval
Oil filter102
Air filter (clean/oil)Every rideNowDo not skip
Valve clearance check150Due
Piston / rings (top end)4022OK
Coolant202

Formula

Due when hours ≥ last service + interval

Hard pack and deep sand eat air filters and piston rings faster. Pull the filter every ride regardless.

Related calculators

Engine Displacement
Swept volume from bore, stroke, and cylinder count. Output in cc, liters, and cubic inches.
2-Stroke / 4-Stroke Displacement
Same swept volume math, plus a power-stroke comparison: a two-stroke fires every crank revolution, a four-stroke every other rev.
Bore & Stroke
Solve the missing dimension. Leave bore at 0 to find bore from displacement and stroke, or stroke at 0 to find stroke from bore.
Compression Ratio
Static CR from bore, stroke, head chamber, piston dome/dish, deck height, and head-gasket volume.