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Derbi · Two-stroke single, oil injection, chain drive

Senda SM 50

Library entry covers 2003-2021

38 factory 52 guideline

Published source

Derbi Senda DRD Evo 50 SM owner's manual (multilingual), ManualsLib 2093424

Factory source. Covers edition year not shown (prints Senda DRD Evo 50 SM); earlier model years of the 2003-2021 row not compared.

90 items for a 2011 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 oil injection (Autolube, Injectolube, Pilgrim pump...)
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, 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

2011 Derbi Senda SM 50

On the road: every 200 km

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 500 km

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 800 km

1 item

Check coolant level

Pre-ride / on the road

Guideline

On the road: every 1,000 km

1 item

Check chain slack and rear wheel alignment

Pre-ride / on the road

Guideline

Every 1,600 km or 6 months

1 item

Inspect tire tread, sidewalls and date codes

Wheels and tires

Guideline

Every 3,000 km or 12 months

1 item

Replace spark plugs (two-stroke)

Engine

Guideline

Every 5,000 km or 12 months

29 items

Coolant (check)

Engine

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. Check at 1,000, 5,000 and 15,000 km.
Cylinder head nuts and screws (check)

Engine

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. At 1,000, 5,000, 15,000 and 25,000 km.
Piston rings (check)

Engine

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. Check at 5,000, 15,000 and 25,000 km.
Rear sprocket fasteners (check)

Engine

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. Every 5,000 km or 12 months.
Spark plug and electrode gap (replace)

Engine

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. Check at 1,000 km; replace every 5,000 km or 12 months.
Air filter (clean)

Fuel and air

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. Clean at 1,000 km, then every 5,000 km or 12 months.
Carburetor (clean and adjust)

Fuel and air

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. At 1,000 km (2 months), then every 5,000 km or 12 months.
Check throttle cable(s) free play and return

Fuel and air

Guideline
Clean fuel tap filter / sediment bowl

Fuel and air

Guideline
Fuel and oil hoses (check)

Fuel and air

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. Check at 1,000, 5,000, 15,000 and 25,000 km.
Electrical system and battery (check)

Ignition and electrics

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. At 1,000 km (2 months), then every 5,000 km or 12 months.
Clutch lever (adjust)

Primary and gearbox

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. At 1,000 km (2 months), then every 5,000 km or 12 months.
Transmission oil (check)

Primary and gearbox

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. Check at 5,000, 15,000 and 25,000 km.
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.
Drive chain (lubricate)

Final drive

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. At 1,000 km (2 months), then every 5,000 km or 12 months.
Drive chain tension (check)

Final drive

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. Check at 1,000, 5,000, 15,000 and 25,000 km.
Inspect chain and sprockets for wear (measure stretch)

Final drive

Guideline
Check steering head bearing adjustment

Front end

Guideline
Front fork oil (check)

Front end

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. Check at 1,000, 5,000, 15,000 and 25,000 km.
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
Brake levers (lubricate)

Brakes

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. At 1,000 km (2 months), then every 5,000 km or 12 months.
Brake pads (check)

Brakes

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. At 1,000 km (2 months), then every 5,000 km or 12 months.
Check brake pads and discs

Brakes

Guideline
Road test, vehicle and brakes

Brakes

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. At 1,000 km (2 months), then every 5,000 km or 12 months.
Check wheel bearings for play

Wheels and tires

Guideline
Tire pressure (check)

Wheels and tires

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. At 1,000 km (2 months), then every 5,000 km or 12 months.
Tires, condition and wear (check)

Wheels and tires

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. Every 5,000 km or 12 months.

Every 5,000 km 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 6,500 km or 12 months

3 items

Check / bleed / adjust oil injection pump cable

Engine

Guideline
Inspect, clean and gap spark plugs

Engine

Guideline
Adjust clutch free play, lubricate cable and lever pivot

Primary and gearbox

Guideline

Every 9,500 km 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 km or 2 years

18 items

Coolant (replace)

Engine

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. Replace at 10,000, 20,000 and 25,000 km per the chart.
Cylinder head, cylinder and piston (clean)

Engine

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. At 10,000 and 20,000 km.
Headlight (adjust)

Engine

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. At 10,000 and 20,000 km.
Inlet reed valve (check)

Engine

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. At 10,000 and 20,000 km.
Odometer drive (lubricate)

Engine

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. At 1,000 km, then 10,000 and 20,000 km.
Oil filter (replace)

Engine

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. At 10,000 and 20,000 km.
Piston rings (replace)

Engine

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. Replace at 10,000 and 20,000 km.
Radiator, external (clean)

Engine

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. At 10,000 and 20,000 km.
Safety fasteners (check)

Engine

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. At 1,000 km, then 10,000 and 20,000 km.
Fuel and oil hoses (replace)

Fuel and air

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. Replace at 10,000 and 20,000 km.
Transmission oil (replace)

Primary and gearbox

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. Replace at 1,000 km, then at 10,000 and 20,000 km (24 and 48 months).
Drive chain (replace)

Final drive

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. Chart marks replace at 10,000 and 20,000 km.
Front fork oil (replace)

Front end

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. Replace at 10,000 and 20,000 km.
Steering (check)

Front end

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. At 1,000 km, then 10,000 and 20,000 km.
Rear shock absorber (check)

Rear suspension and frame

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. At 10,000 and 20,000 km.
Brake fluid level (check)

Brakes

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. At 5,000, 15,000 and 25,000 km.
Brake hoses (check)

Brakes

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. At 10,000 and 20,000 km.
Wheel spokes (check tension)

Wheels and tires

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. At 1,000 km, then 10,000 and 20,000 km.

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
Clean and grease rear suspension linkage

Rear suspension and frame

Guideline
Grease swingarm pivot

Rear suspension and frame

Guideline

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 25,500 km or 4 years

1 item

Replace spark plugs

Engine

Guideline

Every 29,000 km

1 item

Replace chain and sprockets (wear based)

Final drive

Guideline

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 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 6 months

1 item

Clean battery terminals, check charge and strap

Ignition and electrics

Guideline

Every 2 years

5 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
Brake fluid (replace)

Brakes

Factory

Factory: Maintenance and lubrication chart (Derbi Senda DRD Evo 50 SM owner's manual, multilingual, printed pp.88-91; edition year not shown). Columns: 1,000 km or 2 months, 5,000 km or 12 months, 10,000 km or 24 months, 15,000 km or 36 months, 20,000 km or 48 months, 25,000 km or 60 months, whichever comes first. Symbols: replace, check, clean, lubricate, adjust. Every 2 years.
Replace brake fluid

Brakes

Guideline

Every 4 years

4 items

Replace oil injection delivery lines

Engine

Guideline
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.