Honda Monkey 125 2023 Maintenance Schedule
The 2023 Honda Monkey 125 maintenance schedule below covers the manufacturer's recommended service intervals for spark plugs, valve clearance, brake fluid, general maintenance, air filter, oil, drive chain maintenance and tires. 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 |
|---|---|---|---|
| Spark Plug Inspection | Every 8,000 mi · Every 4000 months | Easy–Moderate | Inspect spark plug. |
| 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. |
| Brake Fluid Inspection | Every 4,000 mi · Replace every 24 months | Moderate | Inspect brake fluid level and condition. |
| Nuts, Bolts, Fasteners Inspection | Every 8,000 mi | Easy–Moderate | Check and tighten nuts, bolts, and fasteners. |
| 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. |
| Engine Oil Change | Every 4,000 mi · Every 600 months · Replace every 12 months | Easy | Replace engine oil. |
| 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. |
| Evaporative Emission Control System Inspection | Every 12,000 mi | Easy–Moderate | Inspect evaporative emission control system (charcoal canister). |
| Drive Chain Inspection & Lubrication | Every 300 mi | Easy | Inspect drive chain slack and condition, and lubricate. |
| Brake Pads Wear Inspection | Every 4,000 mi | Easy–Moderate | Inspect brake pad wear. |
| Brake System Inspection | Every 4,000 mi | Moderate | Inspect overall brake system operation. |
| Brake Light Switch Inspection | Every 4,000 mi | Easy | Inspect brake light switch 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. |
| 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. |
| 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. |
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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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