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Yamaha · Overhead-cam four-stroke twin, wet sump, gearbox shares engine oil, shaft drive

BT 1100 Bulldog

Library entry covers 2002-2006

29 factory 22 guideline

Published source

Yamaha BT1100 Bulldog Owner's Manual (5YK, English, MY03), Periodic maintenance and lubrication chart pp.6-2 to 6-5

Factory owner's handbook. Covers 2003-2006 (BT1100 Bulldog, EU owner's manual 5YK, MY03 English edition).

51 items for a 2003 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: Fuel injection
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: Shaft
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

2003 Yamaha BT 1100 Bulldog

On the road: every 200 mi

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 300 mi

2 items

Check lights, horn, brake light switches

Pre-ride / on the road

Guideline
Check tire pressures

Pre-ride / on the road

Guideline

Every 497 mi

1 item

Lubricate drive chain

Pre-ride / on the road

Factory

Manual: Drive chain (check slack, alignment; adjust and lubricate). Factory: Every 800 km and after washing or riding in rain

Every 3,000 mi or 12 months

1 item

Check footrests, pegs, rear brake and gear lever pivots

Rear suspension and frame

Guideline

Every 6,000 mi or 12 months

4 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.
Check charging voltage and regulator / cut-out

Ignition and electrics

Guideline
Check final drive for leaks and bearing play

Final drive

Guideline
Lubricate speedometer / tachometer cables, check drive

Controls and cables

Guideline

A dry speedo cable whips the needle and eventually kills the instrument.

Every 6,214 mi or 12 months

9 items

Change engine oil

Engine

Factory

Manual: Engine oil (change). Factory: Cols 1/10/20/30/40 x1000km; every column incl. initial; annual check; km only
Chassis fasteners (check tightness)

Engine

Factory

Factory: 10000km columns and annual check
Inspect coolant hoses and clamps

Engine

Factory

Manual: Cooling system (check coolant level and leakage). Factory: 10000km columns and annual check
Check throttle cable(s) free play and return

Fuel and air

Factory

Manual: Throttle grip housing and cable (check free play, lubricate). Factory: 10000km columns and annual check
Fuel injection (adjust engine idling speed)

Fuel and air

Factory

Factory: Every column incl. 1000km initial and annual check
Grease and check center / side stand and springs

Rear suspension and frame

Factory

Manual: Sidestand (check operation, lubricate). Factory: 10000km columns and annual check
Check brake pads and discs

Brakes

Factory

Manual: Front/rear brake (check operation, fluid level, leakage). Factory: Every column incl. initial; pads replaced whenever worn to limit
Inspect tire tread, sidewalls and date codes

Wheels and tires

Factory

Manual: Tires (check tread depth, damage, pressure). Factory: 10000km columns and annual check
Lubricate control cables and lever pivots

Controls and cables

Factory

Manual: Moving parts and cables (lubricate). Factory: 10000km columns and annual check

Every 6,214 mi

7 items

Muffler and exhaust pipe (check screw clamp)

Engine

Factory

Factory: Marked 1000km initial, then every 10000km
Adjust clutch free play, lubricate cable and lever pivot

Primary and gearbox

Factory

Manual: Clutch (check operation, adjust). Factory: Marked 1000km initial, then every 10000km
Check steering head bearing adjustment

Front end

Factory

Manual: Steering bearings (check play and roughness). Factory: Marked 1000km initial, then every 10000km
Inspect fork seals, stanchions and fork boots

Front end

Factory

Manual: Front fork (check operation and oil leakage). Factory: 10000km columns
Check swingarm bushes for play

Rear suspension and frame

Factory

Manual: Swingarm (check operation and excessive play). Factory: 10000km columns
Inspect rear shocks for leaks and damping

Rear suspension and frame

Factory

Manual: Shock absorber assembly (check operation and oil leakage). Factory: 10000km columns
Check wheel bearings for play

Wheels and tires

Factory

Manual: Wheel bearings (check looseness or damage). Factory: 10000km columns

Every 10,000 mi or 2 years

1 item

Compression test (or leak-down)

Engine

Guideline

Every 12,000 mi or 2 years

2 items

Synchronize throttle bodies

Fuel and air

Guideline
Change final drive (rear drive) oil

Final drive

Guideline

Every 12,427 mi

7 items

Check and adjust valve clearances

Engine

Factory

Manual: Valves (check clearance, adjust). Factory: Marked at 20000km and 40000km; from 50000km repeat from 10000km
Inspect, clean and gap spark plugs

Engine

Factory

Manual: Spark plug (check condition, clean and regap). Factory: Marked at 10000km and 30000km
Replace oil filter

Engine

Factory

Manual: Engine oil filter element (replace). Factory: Marked 1000km initial, 20000km, 40000km
Replace spark plugs

Engine

Factory

Manual: Spark plug (replace). Factory: Marked at 20000km and 40000km
Replace air filter element

Fuel and air

Factory

Manual: Air filter element (replace). Factory: Marked at 20000km and 40000km
Repack / replace steering head bearings

Front end

Factory

Manual: Steering bearings (lubricate, lithium-soap grease). Factory: Every 20000 km
Clean and grease rear suspension linkage

Rear suspension and frame

Factory

Manual: Suspension relay arm and connecting arm pivots (lubricate). Factory: Lubricate at 20000km and 40000km; check every 10000km

Every 15,000 mi 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 20,000 mi or 4 years

2 items

Lubricate drive shaft splines / check U-joint

Final drive

Guideline
Repack / replace wheel bearings

Wheels and tires

Guideline

Cup-and-cone and taper roller hubs need periodic repacking and adjustment.

Every 24,000 mi or 4 years

1 item

Replace fuel filter

Fuel and air

Guideline

Every 25,000 mi or 6 years

1 item

Replace swingarm bushes / bearings

Rear suspension and frame

Guideline

Every 30,000 mi or 6 years

1 item

Rebuild forks: seals, bushes, springs

Front end

Guideline

Every 31,069 mi

1 item

Grease swingarm pivot

Rear suspension and frame

Factory

Manual: Swingarm (lubricate, lithium-soap grease). Factory: Every 50000 km

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
Rebuild calipers and master cylinders (seals)

Brakes

Factory

Manual: Brake master cylinder and caliper internal components (replace). Factory: Every two years (NOTE under chart)
Replace brake fluid

Brakes

Factory

Manual: Brake fluid (change). Factory: Every two years (NOTE under chart)

Every 3 years

1 item

Replace coolant

Engine

Factory

Manual: Cooling system (change coolant). Factory: Every 3 years

Every 4 years

2 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

Factory

Manual: Brake hoses (replace). Factory: Every 4 years; checked every 10000km and annually

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.