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Rieju · Two-stroke single, premix, chain drive

MR 300

Library entry covers 2021-2024

46 factory 52 guideline

Published source

Rieju MR 300/250/200 Owner's Manual, maintenance table (official PDF pp.34-35)

Factory source. Covers Rieju MR 300 - 250 - 200 Owner's manual (English; no model year printed in the pages read); fit to the 2021-2024 row not confirmed.

98 items for a 2024 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 premix (oil in fuel)
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, hydraulic
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

2024 Rieju MR 300

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

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 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

1 item

Inspect, clean and gap spark plugs

Engine

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 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 0.5 h

1 item

Air filter (check and clean)

Fuel and air

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 0.5 hours of use; clean when needed; replace when damaged. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.

Every 5 h

1 item

Tires (check)

Wheels and tires

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 5 hours; replace when needed. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.

Every 10 h

11 items

Bolts, nuts and fasteners (check)

Engine

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 10 hours; adjust every 20 hours. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
Exhaust and muffler rubber gasket (check)

Engine

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 10 hours; replace when needed. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
Front suspension (check)

Engine

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 10 hours; adjust and clean when needed. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
Kick starter and gear shift pedal (lubricate)

Engine

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 10 hours. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
Radiator tube and connections (check)

Engine

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 10 hours. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
Clutch (check)

Primary and gearbox

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 10 hours; adjust every 20 hours; lubricate every 10 hours. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
Chain (adjust)

Final drive

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 10 hours; replace when needed. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
Steering head adjustment (check)

Front end

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 10 hours. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
Brake fluid level (check)

Brakes

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 10 hours; adjust every 20 hours. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
Front and rear wheel spokes (adjust; use Loctite 243 on the spokes)

Wheels and tires

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 10 hours; replace when needed. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
Throttle cable (check, adjust and lubricate)

Controls and cables

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 10 hours. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.

Every 20 h

13 items

Cylinder head, cylinder and exhaust valve (clean)

Engine

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 20 hours; replace when needed. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
General lubrication

Engine

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 20 hours. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
Muffler fiber (adjust/check)

Engine

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 20 hours. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
Piston and rings (check)

Engine

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 20 hours. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
Spark plug (replace)

Engine

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 20 hours; clean every 10 hours. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
Carburetor (check)

Fuel and air

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 20 hours; adjust when needed. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
Fuel hose (check)

Fuel and air

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 20 hours; replace when needed. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
Transmission oil (change)

Primary and gearbox

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 20 hours. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
Chain guide (lubricate)

Final drive

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 20 hours. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
Chain guide shoe (check)

Final drive

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 20 hours; replace when needed. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
Chain guide wear (check)

Final drive

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 20 hours. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
Swingarm and linkage (check and grease)

Rear suspension and frame

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 20 hours; replace when needed. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
Brake adjustment (check)

Brakes

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 20 hours; replace parts when needed. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.

Every 30 h

7 items

Coolant (replace)

Engine

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 30 hours. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
Front suspension oil (change)

Engine

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 30 hours. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
Muffler fiber (replace)

Engine

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 30 hours. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
Clutch discs (check)

Primary and gearbox

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 30 hours; replace when needed. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
Steering bearing (grease)

Front end

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 30 hours. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
Brake wear (check)

Brakes

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 30 hours; replace when needed. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
Wheel bearings (check)

Wheels and tires

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 30 hours; replace when needed. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.

Every 40 h

1 item

Radiator tube and connections (replace)

Engine

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 40 hours. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.

Every 50 h

1 item

Piston and rings (replace)

Engine

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 50 hours. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.

Every 80 h

2 items

Connecting rod and bearings (check)

Engine

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 80 hours. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
Crankshaft bearings (check)

Engine

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 80 hours; replace at 120 hours or when needed. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.

Every 120 h

1 item

Connecting rod and bearings (replace)

Engine

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 120 hours. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.

Every 6 months

1 item

Clean battery terminals, check charge and strap

Ignition and electrics

Guideline

Every 2 years

9 items

Rear suspension (check)

Engine

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 2 years; replace when needed. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
Replace coolant

Engine

Guideline
Inspect wiring, bullet connectors and ground points

Ignition and electrics

Guideline
Replace hydraulic clutch fluid

Primary and gearbox

Guideline
Inspect frame, welds and lugs for cracks

Rear suspension and frame

Guideline
Brake caliper piston and dust cover (replace)

Brakes

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 2 years. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
Brake fluid (replace)

Brakes

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 2 years. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
Brake master cylinder piston and dust cover (replace)

Brakes

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 2 years. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
Replace brake fluid

Brakes

Guideline

Every 4 years

4 items

Replace fuel lines

Fuel and air

Guideline

Old rubber and modern ethanol fuel do not mix well.
Brake hose (replace)

Brakes

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): every 4 years. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
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

No interval set

3 items

Exhaust system (replace when needed)

Engine

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): when needed. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
Fuel system (clean when needed)

Fuel and air

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): when needed. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.
Battery (charge)

Ignition and electrics

Factory

Factory: Maintenance table (manual pp.34-35, official PDF pp.34-35): 12 hours slow charge as needed. Columns as printed: check/inspect, adjust, replace/change, clean, grease/lubricate, each with an interval in hours or when needed. Shorten intervals for competition use.

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.