Honda Monkey 125 2021 Maintenance Schedule
The 2021 Honda Monkey 125 maintenance schedule below covers the manufacturer's recommended service intervals for drive chain maintenance, general maintenance, spark plugs, valve clearance, oil, brake fluid, tires and air filter. Intervals are shown in kilometres by default and can be switched to miles.
Sourced from American Honda Motor Co. (Owners Manual) (this document covers model years 2018–2025): 2rom-prd-data.hondamotopub.com
Full schedule
| Task | Interval | Difficulty | Notes |
|---|---|---|---|
| Drive Chain Inspection & Lubrication | Every 300 mi | Easy | Inspect drive chain slack and condition, and lubricate. |
| Brake System Inspection | Every 4,000 mi | Moderate | Inspect overall brake system operation. |
| Spark Plug Replacement | Every 8,000 mi | Easy–Moderate | Replace spark plug. |
| Valve Clearance Inspection | Every 4,000 mi | Advanced | Inspect and adjust valve clearance. |
| Engine Oil Change | Every 4,000 mi · Every 600 months · Replace every 12 months | Easy | Replace engine oil. |
| Evaporative Emission Control System Inspection | Every 12,000 mi | Easy–Moderate | Inspect evaporative emission control system (charcoal canister). |
| Brake Fluid Inspection | Every 4,000 mi · Replace every 24 months | Moderate | Inspect brake fluid level and condition. |
| Brake Pads Wear Inspection | Every 4,000 mi | Easy–Moderate | Inspect brake pad wear. |
| Brake Light Switch Inspection | Every 4,000 mi | Easy | Inspect brake light switch operation. |
| Headlight Aim Inspection | Every 4,000 mi | Easy–Moderate | Inspect and adjust headlight aim. |
| Clutch System Inspection | Every 4,000 mi | Easy–Moderate | Inspect clutch lever freeplay and system operation. |
| Side Stand Inspection | Every 4,000 mi | Easy–Moderate | Inspect side stand and ignition cut-off system operation. |
| Suspension Inspection | Every 4,000 mi | Easy–Moderate | Inspect front and rear suspension. |
| Nuts, Bolts, Fasteners Inspection | Every 8,000 mi | Easy–Moderate | Check and tighten nuts, bolts, and fasteners. |
| Wheels/Tires Inspection | Every 4,000 mi | Moderate | Inspect wheels and tires for damage and wear. |
| Steering Head Bearings Inspection | Every 8,000 mi | Advanced | Inspect steering head bearings for looseness or damage. |
| Fuel Line Inspection | Every 4,000 mi | Easy–Moderate | Inspect fuel line for leaks, cracks, or damage. |
| Throttle Operation Inspection | Every 4,000 mi | Easy–Moderate | Check throttle grip freeplay and smooth operation. |
| Air Cleaner Replacement | Every 12,000 mi | Easy | Replace air cleaner element. |
| Crankcase Breather Cleaning | Every 4,000 mi | Easy–Moderate | Clean crankcase breather. |
| Spark Plug Inspection | Every 8,000 mi · Every 4000 months | Easy–Moderate | Inspect spark plug. |
| Engine Oil Strainer Screen Cleaning | Every 8,000 mi | Easy | Clean engine oil strainer screen. |
| Engine Oil Centrifugal Filter Cleaning | Every 8,000 mi | Easy | Clean engine oil centrifugal filter. |
| Engine Idle Speed Inspection | Every 4,000 mi · Every 600 months | Easy–Moderate | Check and adjust engine idle speed. |
No maintenance items match your search.
Easy: basic tools, straightforward Easy–Moderate: varies by task — somewhere between the two Moderate: some mechanical know-how helps Advanced: specialized tools/skill, still DIY-doable Expert: significant experience required Professional: dealer or shop recommended
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