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Derbi · Overhead-cam four-stroke single, wet sump, gearbox shares engine oil, chain drive

Senda 125

Library entry covers 2006

28 factory 49 guideline

Published source

Derbi SENDA 125 c.c. 4 Stroke workshop manual (Nacional Motor S.A.U.), periodical maintenance chart printed pp.30-31 (dealerinfo.net)

Factory service manual. Covers Workshop manual covering SENDA 125 SM and SENDA 125 R 4 Stroke; no year printed (file name says 2005).

77 items for a 2006 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: Four-stroke
Engine lubrication: Wet sump (oil in crankcase)
Oil filtration: Replaceable cartridge or spin-on filter
Valve gear: Overhead cam, screw/locknut adjusters
Ignition: Electronic (CDI / transistor / ECU)
Charging: Alternator / stator with rectifier
Battery: Wet cell (flooded lead-acid, needs topping up)
Fuel system: Single carburetor
Cooling: Air / oil cooled
Primary drive: Gear or chain inside engine, shares engine oil
Gearbox oil: Shares engine 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

2006 Derbi Senda 125

On the road: every 300 km

1 item

Check engine oil level

Pre-ride / on the road

Guideline

Each fuel stop on old machines. Dry sump: check the tank hot, engine idling or just stopped, per your manual.

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 1,000 km

1 item

Check chain slack and rear wheel alignment

Pre-ride / on the road

Guideline

Every 500 km

1 item

Drive chain: check slack and alignment, adjust, clean and lubricate

Final drive

Factory

Factory: Periodical maintenance / lubrication intervals (Derbi SENDA 125 c.c. 4 Stroke workshop manual, SENDA 125 SM and SENDA 125 R 4 Stroke, printed pp.30-31; columns 1,000 km, every 3,000 km, every 6,000 km, every 12,000 km). * = recommended to be checked by an authorised DERBI dealer. Every 500 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

6 items

Engine oil (change; run engine till hot before draining)

Engine

Factory

Factory: Periodical maintenance / lubrication intervals (Derbi SENDA 125 c.c. 4 Stroke workshop manual, SENDA 125 SM and SENDA 125 R 4 Stroke, printed pp.30-31; columns 1,000 km, every 3,000 km, every 6,000 km, every 12,000 km). * = recommended to be checked by an authorised DERBI dealer. At 1,000 km, then every 3,000 km.
Spark plug: check condition, clean or replace if necessary

Engine

Factory

Factory: Periodical maintenance / lubrication intervals (Derbi SENDA 125 c.c. 4 Stroke workshop manual, SENDA 125 SM and SENDA 125 R 4 Stroke, printed pp.30-31; columns 1,000 km, every 3,000 km, every 6,000 km, every 12,000 km). * = recommended to be checked by an authorised DERBI dealer. At 1,000 km, then every 3,000 km.
Valves: check clearance, adjust if necessary *

Engine

Factory

Factory: Periodical maintenance / lubrication intervals (Derbi SENDA 125 c.c. 4 Stroke workshop manual, SENDA 125 SM and SENDA 125 R 4 Stroke, printed pp.30-31; columns 1,000 km, every 3,000 km, every 6,000 km, every 12,000 km). * = recommended to be checked by an authorised DERBI dealer. At 1,000 km, then every 3,000 km.
Air filter: clean, inspect and lubricate (replace if necessary)

Fuel and air

Factory

Factory: Periodical maintenance / lubrication intervals (Derbi SENDA 125 c.c. 4 Stroke workshop manual, SENDA 125 SM and SENDA 125 R 4 Stroke, printed pp.30-31; columns 1,000 km, every 3,000 km, every 6,000 km, every 12,000 km). * = recommended to be checked by an authorised DERBI dealer. At 1,000 km, then every 3,000 km.
Carburetor: check idle speed and choke operation, adjust if necessary *

Fuel and air

Factory

Factory: Periodical maintenance / lubrication intervals (Derbi SENDA 125 c.c. 4 Stroke workshop manual, SENDA 125 SM and SENDA 125 R 4 Stroke, printed pp.30-31; columns 1,000 km, every 3,000 km, every 6,000 km, every 12,000 km). * = recommended to be checked by an authorised DERBI dealer. At 1,000 km, then every 3,000 km.
Clutch: check alignment of activating rod and casing marks (L1), adjust if necessary

Primary and gearbox

Factory

Factory: Periodical maintenance / lubrication intervals (Derbi SENDA 125 c.c. 4 Stroke workshop manual, SENDA 125 SM and SENDA 125 R 4 Stroke, printed pp.30-31; columns 1,000 km, every 3,000 km, every 6,000 km, every 12,000 km). * = recommended to be checked by an authorised DERBI dealer. Every 3,000 km.

Every 5,000 km or 12 months

11 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 spoke tension and wheel true

Wheels and tires

Guideline
Check wheel bearings for play

Wheels and tires

Guideline

Every 6,000 km

13 items

Discs and calipers: adjust and check condition

Engine

Factory

Factory: Periodical maintenance / lubrication intervals (Derbi SENDA 125 c.c. 4 Stroke workshop manual, SENDA 125 SM and SENDA 125 R 4 Stroke, printed pp.30-31; columns 1,000 km, every 3,000 km, every 6,000 km, every 12,000 km). * = recommended to be checked by an authorised DERBI dealer. Every 6,000 km.
Fuel line: inspect fuel and vacuum hoses for cracks or damage, replace if necessary

Fuel and air

Factory

Factory: Periodical maintenance / lubrication intervals (Derbi SENDA 125 c.c. 4 Stroke workshop manual, SENDA 125 SM and SENDA 125 R 4 Stroke, printed pp.30-31; columns 1,000 km, every 3,000 km, every 6,000 km, every 12,000 km). * = recommended to be checked by an authorised DERBI dealer. Every 6,000 km.
Battery: charge if necessary

Ignition and electrics

Factory

Factory: Periodical maintenance / lubrication intervals (Derbi SENDA 125 c.c. 4 Stroke workshop manual, SENDA 125 SM and SENDA 125 R 4 Stroke, printed pp.30-31; columns 1,000 km, every 3,000 km, every 6,000 km, every 12,000 km). * = recommended to be checked by an authorised DERBI dealer. At 1,000 km, then every 6,000 km.
Front forks: check functioning and oil leaks *

Front end

Factory

Factory: Periodical maintenance / lubrication intervals (Derbi SENDA 125 c.c. 4 Stroke workshop manual, SENDA 125 SM and SENDA 125 R 4 Stroke, printed pp.30-31; columns 1,000 km, every 3,000 km, every 6,000 km, every 12,000 km). * = recommended to be checked by an authorised DERBI dealer. Every 6,000 km.
Steering bearings: check for clearance or damage *

Front end

Factory

Factory: Periodical maintenance / lubrication intervals (Derbi SENDA 125 c.c. 4 Stroke workshop manual, SENDA 125 SM and SENDA 125 R 4 Stroke, printed pp.30-31; columns 1,000 km, every 3,000 km, every 6,000 km, every 12,000 km). * = recommended to be checked by an authorised DERBI dealer. At 1,000 km, then every 6,000 km.
Prop stand: check functioning, lubricate if necessary

Rear suspension and frame

Factory

Factory: Periodical maintenance / lubrication intervals (Derbi SENDA 125 c.c. 4 Stroke workshop manual, SENDA 125 SM and SENDA 125 R 4 Stroke, printed pp.30-31; columns 1,000 km, every 3,000 km, every 6,000 km, every 12,000 km). * = recommended to be checked by an authorised DERBI dealer. At 1,000 km, then every 6,000 km.
Shock absorber: check functioning, replace if necessary *

Rear suspension and frame

Factory

Factory: Periodical maintenance / lubrication intervals (Derbi SENDA 125 c.c. 4 Stroke workshop manual, SENDA 125 SM and SENDA 125 R 4 Stroke, printed pp.30-31; columns 1,000 km, every 3,000 km, every 6,000 km, every 12,000 km). * = recommended to be checked by an authorised DERBI dealer. Every 6,000 km.
Swinging arm joint shaft: check play, tighten to specified torque if necessary *

Rear suspension and frame

Factory

Factory: Periodical maintenance / lubrication intervals (Derbi SENDA 125 c.c. 4 Stroke workshop manual, SENDA 125 SM and SENDA 125 R 4 Stroke, printed pp.30-31; columns 1,000 km, every 3,000 km, every 6,000 km, every 12,000 km). * = recommended to be checked by an authorised DERBI dealer. At 1,000 km, then every 6,000 km.
Brake fluid level (check)

Brakes

Factory

Factory: Periodical maintenance / lubrication intervals (Derbi SENDA 125 c.c. 4 Stroke workshop manual, SENDA 125 SM and SENDA 125 R 4 Stroke, printed pp.30-31; columns 1,000 km, every 3,000 km, every 6,000 km, every 12,000 km). * = recommended to be checked by an authorised DERBI dealer. At 1,000 km, then every 6,000 km.
Front/rear brake pads (check wear)

Brakes

Factory

Factory: Periodical maintenance / lubrication intervals (Derbi SENDA 125 c.c. 4 Stroke workshop manual, SENDA 125 SM and SENDA 125 R 4 Stroke, printed pp.30-31; columns 1,000 km, every 3,000 km, every 6,000 km, every 12,000 km). * = recommended to be checked by an authorised DERBI dealer. Every 6,000 km.
Throttle, clutch control and front brake cables: check functioning, clearance, damage

Brakes

Factory

Factory: Periodical maintenance / lubrication intervals (Derbi SENDA 125 c.c. 4 Stroke workshop manual, SENDA 125 SM and SENDA 125 R 4 Stroke, printed pp.30-31; columns 1,000 km, every 3,000 km, every 6,000 km, every 12,000 km). * = recommended to be checked by an authorised DERBI dealer. At 1,000 km, then every 6,000 km.
Wheel bearings: check for clearance or damage *

Wheels and tires

Factory

Factory: Periodical maintenance / lubrication intervals (Derbi SENDA 125 c.c. 4 Stroke workshop manual, SENDA 125 SM and SENDA 125 R 4 Stroke, printed pp.30-31; columns 1,000 km, every 3,000 km, every 6,000 km, every 12,000 km). * = recommended to be checked by an authorised DERBI dealer. Every 6,000 km.
Wheels: check for distortion, spoke tightness, damage *

Wheels and tires

Factory

Factory: Periodical maintenance / lubrication intervals (Derbi SENDA 125 c.c. 4 Stroke workshop manual, SENDA 125 SM and SENDA 125 R 4 Stroke, printed pp.30-31; columns 1,000 km, every 3,000 km, every 6,000 km, every 12,000 km). * = recommended to be checked by an authorised DERBI dealer. At 1,000 km, then every 6,000 km.

Every 6,500 km or 12 months

2 items

Inspect, clean and gap spark plugs

Engine

Guideline
Adjust clutch free play, lubricate cable and lever pivot

Primary and gearbox

Guideline

Every 8,000 km or 12 months

2 items

Change engine oil

Engine

Guideline

Pre-1970 machines: many owners run non-detergent or classic-spec oil with no filter, so short intervals matter. Dry sump: drain the tank and the crankcase/sump, flush the tank and clean the feed and return screens.
Replace oil filter

Engine

Guideline

Every 9,500 km or 12 months

7 items

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 12,000 km

7 items

Nuts, bolts and fixing devices: check tightness *

Engine

Factory

Factory: Periodical maintenance / lubrication intervals (Derbi SENDA 125 c.c. 4 Stroke workshop manual, SENDA 125 SM and SENDA 125 R 4 Stroke, printed pp.30-31; columns 1,000 km, every 3,000 km, every 6,000 km, every 12,000 km). * = recommended to be checked by an authorised DERBI dealer. At 1,000 km, then every 12,000 km.
Spark plug (change)

Engine

Factory

Factory: Periodical maintenance / lubrication intervals (Derbi SENDA 125 c.c. 4 Stroke workshop manual, SENDA 125 SM and SENDA 125 R 4 Stroke, printed pp.30-31; columns 1,000 km, every 3,000 km, every 6,000 km, every 12,000 km). * = recommended to be checked by an authorised DERBI dealer. Change every 12,000 km.
Air filter (change)

Fuel and air

Factory

Factory: Periodical maintenance / lubrication intervals (Derbi SENDA 125 c.c. 4 Stroke workshop manual, SENDA 125 SM and SENDA 125 R 4 Stroke, printed pp.30-31; columns 1,000 km, every 3,000 km, every 6,000 km, every 12,000 km). * = recommended to be checked by an authorised DERBI dealer. Change every 12,000 km.
Front fork oil (change) *

Front end

Factory

Factory: Periodical maintenance / lubrication intervals (Derbi SENDA 125 c.c. 4 Stroke workshop manual, SENDA 125 SM and SENDA 125 R 4 Stroke, printed pp.30-31; columns 1,000 km, every 3,000 km, every 6,000 km, every 12,000 km). * = recommended to be checked by an authorised DERBI dealer. Change the oil every 12,000 km.
Steering bearings (grease) *

Front end

Factory

Factory: Periodical maintenance / lubrication intervals (Derbi SENDA 125 c.c. 4 Stroke workshop manual, SENDA 125 SM and SENDA 125 R 4 Stroke, printed pp.30-31; columns 1,000 km, every 3,000 km, every 6,000 km, every 12,000 km). * = recommended to be checked by an authorised DERBI dealer. Grease every 12,000 km.
Swinging arm joint shaft (grease) *

Rear suspension and frame

Factory

Factory: Periodical maintenance / lubrication intervals (Derbi SENDA 125 c.c. 4 Stroke workshop manual, SENDA 125 SM and SENDA 125 R 4 Stroke, printed pp.30-31; columns 1,000 km, every 3,000 km, every 6,000 km, every 12,000 km). * = recommended to be checked by an authorised DERBI dealer. Grease every 12,000 km.
Wheel bearings (grease) *

Wheels and tires

Factory

Factory: Periodical maintenance / lubrication intervals (Derbi SENDA 125 c.c. 4 Stroke workshop manual, SENDA 125 SM and SENDA 125 R 4 Stroke, printed pp.30-31; columns 1,000 km, every 3,000 km, every 6,000 km, every 12,000 km). * = recommended to be checked by an authorised DERBI dealer. Grease every 12,000 km.

Every 13,000 km or 2 years

1 item

Check and adjust valve clearances

Engine

Guideline

Every 16,000 km or 2 years

1 item

Compression test (or leak-down)

Engine

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

4 items

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 (change)

Brakes

Factory

Factory: Periodical maintenance / lubrication intervals (Derbi SENDA 125 c.c. 4 Stroke workshop manual, SENDA 125 SM and SENDA 125 R 4 Stroke, printed pp.30-31; columns 1,000 km, every 3,000 km, every 6,000 km, every 12,000 km). * = recommended to be checked by an authorised DERBI dealer. Every 2 years.
Replace brake fluid

Brakes

Guideline

Every 4 years

3 items

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.