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

Senda X-Treme 50 SM

Library entry covers 2004-2021

30 factory 60 guideline

Published source

Derbi SENDA 50 DRD RACING X-TREME owner's manual, Routine Maintenance Table printed pp.120-122 (ManualsLib)

Factory owner's handbook. Covers Derbi SENDA 50 DRD RACING X-TREME owner's manual (Piaggio-group chapter format; variants printed RACING - R, RACING - SM, X-TREME - R, X-TREME - SM); edition year not shown. Brake fluid replacement is marked (*) with no interval in the rows; early model years of the row not compared.

90 items for a 2018 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: Magneto (incl. magdyno, flywheel magneto)
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: Spoked, tubed
Sidecar: No sidecar

Maintenance schedule

2018 Derbi Senda X-Treme 50 SM

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 1,000 km or 2 months

1 item

Spark plug (check)

Engine

Factory

Factory: Routine maintenance table (Derbi SENDA 50 DRD RACING X-TREME owner's manual, chapter 06 Programd maintenance, English, printed pp.120-122); columns 1, 5, 10, 15, 20, 25 thousand km with months 2, 12, 24, 36, 48, 60. I = check and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. I at 1,000 km.

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

27 items

Coolant (check)

Engine

Factory

Factory: Routine maintenance table (Derbi SENDA 50 DRD RACING X-TREME owner's manual, chapter 06 Programd maintenance, English, printed pp.120-122); columns 1, 5, 10, 15, 20, 25 thousand km with months 2, 12, 24, 36, 48, 60. I = check and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. I at 1,000, 5,000 and 15,000 km. Printed with a (*) note not read.
Screws (tighten / check)

Engine

Factory

Factory: Routine maintenance table (Derbi SENDA 50 DRD RACING X-TREME owner's manual, chapter 06 Programd maintenance, English, printed pp.120-122); columns 1, 5, 10, 15, 20, 25 thousand km with months 2, 12, 24, 36, 48, 60. I = check and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. I at 1,000 km and every 5,000 km (12 months).
Spark plug (replace)

Engine

Factory

Factory: Routine maintenance table (Derbi SENDA 50 DRD RACING X-TREME owner's manual, chapter 06 Programd maintenance, English, printed pp.120-122); columns 1, 5, 10, 15, 20, 25 thousand km with months 2, 12, 24, 36, 48, 60. I = check and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. R every 5,000 km (12 months).
Air filter (clean)

Fuel and air

Factory

Factory: Routine maintenance table (Derbi SENDA 50 DRD RACING X-TREME owner's manual, chapter 06 Programd maintenance, English, printed pp.120-122); columns 1, 5, 10, 15, 20, 25 thousand km with months 2, 12, 24, 36, 48, 60. I = check and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. C at 1,000 km and every 5,000 km (12 months).
Carburetor (check)

Fuel and air

Factory

Factory: Routine maintenance table (Derbi SENDA 50 DRD RACING X-TREME owner's manual, chapter 06 Programd maintenance, English, printed pp.120-122); columns 1, 5, 10, 15, 20, 25 thousand km with months 2, 12, 24, 36, 48, 60. I = check and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. I at 1,000 km and every 5,000 km (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 pipes (check)

Fuel and air

Factory

Factory: Routine maintenance table (Derbi SENDA 50 DRD RACING X-TREME owner's manual, chapter 06 Programd maintenance, English, printed pp.120-122); columns 1, 5, 10, 15, 20, 25 thousand km with months 2, 12, 24, 36, 48, 60. I = check and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. I at 1,000, 5,000, 15,000 and 25,000 km.
Battery electrolyte level (check)

Ignition and electrics

Factory

Factory: Routine maintenance table (Derbi SENDA 50 DRD RACING X-TREME owner's manual, chapter 06 Programd maintenance, English, printed pp.120-122); columns 1, 5, 10, 15, 20, 25 thousand km with months 2, 12, 24, 36, 48, 60. I = check and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. I at 1,000 km and every 5,000 km (12 months).
Check / set ignition timing

Ignition and electrics

Guideline
Clean and gap contact breaker points, oil cam felt

Ignition and electrics

Guideline
Clutch control lever (adjust)

Primary and gearbox

Factory

Factory: Routine maintenance table (Derbi SENDA 50 DRD RACING X-TREME owner's manual, chapter 06 Programd maintenance, English, printed pp.120-122); columns 1, 5, 10, 15, 20, 25 thousand km with months 2, 12, 24, 36, 48, 60. I = check and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. A at 1,000 km and every 5,000 km (12 months).
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
Transmission kit: chain, sprockets (check)

Final drive

Factory

Factory: Routine maintenance table (Derbi SENDA 50 DRD RACING X-TREME owner's manual, chapter 06 Programd maintenance, English, printed pp.120-122); columns 1, 5, 10, 15, 20, 25 thousand km with months 2, 12, 24, 36, 48, 60. I = check and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. I at 1,000 km and every 5,000 km (12 months). Printed with a (**) note not read.
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
Brake levers (lubricate)

Brakes

Factory

Factory: Routine maintenance table (Derbi SENDA 50 DRD RACING X-TREME owner's manual, chapter 06 Programd maintenance, English, printed pp.120-122); columns 1, 5, 10, 15, 20, 25 thousand km with months 2, 12, 24, 36, 48, 60. I = check and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. L at 1,000 km and every 5,000 km (12 months).
Brake pads (check)

Brakes

Factory

Factory: Routine maintenance table (Derbi SENDA 50 DRD RACING X-TREME owner's manual, chapter 06 Programd maintenance, English, printed pp.120-122); columns 1, 5, 10, 15, 20, 25 thousand km with months 2, 12, 24, 36, 48, 60. I = check and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. I at 1,000 km and every 5,000 km (12 months).
Check brake pads and discs

Brakes

Guideline
Vehicle and brake system test

Brakes

Factory

Factory: Routine maintenance table (Derbi SENDA 50 DRD RACING X-TREME owner's manual, chapter 06 Programd maintenance, English, printed pp.120-122); columns 1, 5, 10, 15, 20, 25 thousand km with months 2, 12, 24, 36, 48, 60. I = check and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. I at 1,000 km and every 5,000 km (12 months).
Check spoke tension and wheel true

Wheels and tires

Guideline
Check wheel bearings for play

Wheels and tires

Guideline
Tire pressure (check)

Wheels and tires

Factory

Factory: Routine maintenance table (Derbi SENDA 50 DRD RACING X-TREME owner's manual, chapter 06 Programd maintenance, English, printed pp.120-122); columns 1, 5, 10, 15, 20, 25 thousand km with months 2, 12, 24, 36, 48, 60. I = check and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. I at 1,000 km and every 5,000 km (12 months).
Tires (check)

Wheels and tires

Factory

Factory: Routine maintenance table (Derbi SENDA 50 DRD RACING X-TREME owner's manual, chapter 06 Programd maintenance, English, printed pp.120-122); columns 1, 5, 10, 15, 20, 25 thousand km with months 2, 12, 24, 36, 48, 60. I = check and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. I every 5,000 km (12 months), from 5,000 km.

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 9,500 km or 2 years

2 items

Lubricate and check automatic advance unit

Ignition and electrics

Guideline
Magneto: clean slip ring and pickup brush, check HT lead

Ignition and electrics

Guideline

Every 10,000 km or 2 years

15 items

Coolant (replace)

Engine

Factory

Factory: Routine maintenance table (Derbi SENDA 50 DRD RACING X-TREME owner's manual, chapter 06 Programd maintenance, English, printed pp.120-122); columns 1, 5, 10, 15, 20, 25 thousand km with months 2, 12, 24, 36, 48, 60. I = check and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. R at 10,000, 20,000 and 25,000 km as printed.
Engine oil (check)

Engine

Factory

Factory: Routine maintenance table (Derbi SENDA 50 DRD RACING X-TREME owner's manual, chapter 06 Programd maintenance, English, printed pp.120-122); columns 1, 5, 10, 15, 20, 25 thousand km with months 2, 12, 24, 36, 48, 60. I = check and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. I at 5,000, 15,000 and 25,000 km.
Engine oil (replace)

Engine

Factory

Factory: Routine maintenance table (Derbi SENDA 50 DRD RACING X-TREME owner's manual, chapter 06 Programd maintenance, English, printed pp.120-122); columns 1, 5, 10, 15, 20, 25 thousand km with months 2, 12, 24, 36, 48, 60. I = check and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. R at 1,000 km, then at 10,000 km and 20,000 km.
Head, cylinder and piston (check)

Engine

Factory

Factory: Routine maintenance table (Derbi SENDA 50 DRD RACING X-TREME owner's manual, chapter 06 Programd maintenance, English, printed pp.120-122); columns 1, 5, 10, 15, 20, 25 thousand km with months 2, 12, 24, 36, 48, 60. I = check and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. I at 10,000 km (24 months) and 20,000 km (48 months).
Headlight (adjust)

Engine

Factory

Factory: Routine maintenance table (Derbi SENDA 50 DRD RACING X-TREME owner's manual, chapter 06 Programd maintenance, English, printed pp.120-122); columns 1, 5, 10, 15, 20, 25 thousand km with months 2, 12, 24, 36, 48, 60. I = check and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. A at 10,000 km (24 months) and 20,000 km (48 months).
Radiator, external (clean)

Engine

Factory

Factory: Routine maintenance table (Derbi SENDA 50 DRD RACING X-TREME owner's manual, chapter 06 Programd maintenance, English, printed pp.120-122); columns 1, 5, 10, 15, 20, 25 thousand km with months 2, 12, 24, 36, 48, 60. I = check and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. C at 10,000 km (24 months) and 20,000 km (48 months).
Reed valve intake (check)

Engine

Factory

Factory: Routine maintenance table (Derbi SENDA 50 DRD RACING X-TREME owner's manual, chapter 06 Programd maintenance, English, printed pp.120-122); columns 1, 5, 10, 15, 20, 25 thousand km with months 2, 12, 24, 36, 48, 60. I = check and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. I at 10,000 km (24 months) and 20,000 km (48 months).
Safety fasteners (check)

Engine

Factory

Factory: Routine maintenance table (Derbi SENDA 50 DRD RACING X-TREME owner's manual, chapter 06 Programd maintenance, English, printed pp.120-122); columns 1, 5, 10, 15, 20, 25 thousand km with months 2, 12, 24, 36, 48, 60. I = check and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. I at 1,000 km, then at 10,000 km and 20,000 km.
Fuel and oil pipes (replace)

Fuel and air

Factory

Factory: Routine maintenance table (Derbi SENDA 50 DRD RACING X-TREME owner's manual, chapter 06 Programd maintenance, English, printed pp.120-122); columns 1, 5, 10, 15, 20, 25 thousand km with months 2, 12, 24, 36, 48, 60. I = check and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. R at 10,000 km (24 months) and 20,000 km (48 months).
Fork oil (replace)

Front end

Factory

Factory: Routine maintenance table (Derbi SENDA 50 DRD RACING X-TREME owner's manual, chapter 06 Programd maintenance, English, printed pp.120-122); columns 1, 5, 10, 15, 20, 25 thousand km with months 2, 12, 24, 36, 48, 60. I = check and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. R at 10,000 km (24 months) and 20,000 km (48 months).
Steering (check)

Front end

Factory

Factory: Routine maintenance table (Derbi SENDA 50 DRD RACING X-TREME owner's manual, chapter 06 Programd maintenance, English, printed pp.120-122); columns 1, 5, 10, 15, 20, 25 thousand km with months 2, 12, 24, 36, 48, 60. I = check and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. I at 1,000 km, then at 10,000 km and 20,000 km.
Rear shock absorber (check)

Rear suspension and frame

Factory

Factory: Routine maintenance table (Derbi SENDA 50 DRD RACING X-TREME owner's manual, chapter 06 Programd maintenance, English, printed pp.120-122); columns 1, 5, 10, 15, 20, 25 thousand km with months 2, 12, 24, 36, 48, 60. I = check and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. I at 10,000 km (24 months) and 20,000 km (48 months).
Brake fluid level (check)

Brakes

Factory

Factory: Routine maintenance table (Derbi SENDA 50 DRD RACING X-TREME owner's manual, chapter 06 Programd maintenance, English, printed pp.120-122); columns 1, 5, 10, 15, 20, 25 thousand km with months 2, 12, 24, 36, 48, 60. I = check and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. I at 5,000, 15,000 and 25,000 km.
Brake hoses (check)

Brakes

Factory

Factory: Routine maintenance table (Derbi SENDA 50 DRD RACING X-TREME owner's manual, chapter 06 Programd maintenance, English, printed pp.120-122); columns 1, 5, 10, 15, 20, 25 thousand km with months 2, 12, 24, 36, 48, 60. I = check and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. I at 10,000 km (24 months) and 20,000 km (48 months).
Spokes: tension (check)

Wheels and tires

Factory

Factory: Routine maintenance table (Derbi SENDA 50 DRD RACING X-TREME owner's manual, chapter 06 Programd maintenance, English, printed pp.120-122); columns 1, 5, 10, 15, 20, 25 thousand km with months 2, 12, 24, 36, 48, 60. I = check and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. I at 1,000 km, then at 10,000 km 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 19,500 km or 3 years

1 item

Replace points and condenser

Ignition and electrics

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 40,000 km or 10 years

1 item

Magneto overhaul / re-magnetize, replace capacitor

Ignition and electrics

Guideline

Weak spark when hot is the classic symptom. Old capacitors fail with age, not miles.

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

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

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

2 items

Replace inner tubes and rim tape with tires

Wheels and tires

Guideline
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.