Yamaha recommends changing the engine oil and filter at regular intervals as per the maintenance schedule.
Many riders confuse the "Owner's Manual" (often available for free online) with the comprehensive "Service Manual" (a detailed technical document). The Owner's Manual is your day-to-day guide, designed to be kept with the motorcycle. It covers basic controls, safety checks, and the periodic maintenance chart. It explicitly states, "This manual should stay with this vehicle if it is sold". Yamaha Mt 15 Service Manual
| Symptom | Likely Cause | Fix | |---------|--------------|-----| | Hard start cold | Valve clearance tight (exhaust) | Adjust to 0.20 mm | | VVA not engaging (no pull after 7.4k rpm) | Solenoid stuck, low oil pressure (under 2.5 bar) | Check oil level, test solenoid, clean strainer | | ABS warning light stays on | Wheel sensor gap too wide | Gap: 0.7–1.2 mm, clean tone ring | | Engine knock on acceleration | Low octane fuel (<91 RON) | Use 95 RON | | Clutch slips at high rpm | Worn plates, weak springs | Replace friction plates (thickness >2.8 mm) | Yamaha recommends changing the engine oil and filter
| Specification | Details | | :--- | :--- | | | 155cc, Liquid-cooled, SOHC, 4-stroke, Single cylinder | | Bore & Stroke | 58.0 mm × 58.7 mm | | Compression Ratio | 11.6 : 1 | | Max Power | 18.4 PS (13.5 kW) @ 10,000 rpm | | Max Torque | 14.1 Nm (10.4 lbf·ft) @ 7,500 rpm | | Transmission | Constant mesh, 6-speed | | Frame Type | Deltabox (Twin-spar) | | Front Suspension | Inverted telescopic fork | | Rear Suspension | Monoshock | | Front Tire | 110/70-17 | | Rear Tire | 140/70-17 | | Fuel Capacity | 10 Liters | | Oil Capacity | 1.05 Liters | | Seat Height | 810 mm | | Wheelbase | 1,335 mm | It covers basic controls, safety checks, and the
This article serves as a detailed guide to understanding the , highlighting key maintenance schedules, technical specifications, and procedures necessary to keep your bike in peak condition, covering models up to the updated 2026 version. Why You Need the Yamaha MT-15 Service Manual
Yamaha uses standard wire colors across its platforms (e.g., Black is always Ground, Red is positive battery feed, Dark Green/Dark Brown are turn signals).
You can confidently handle routine maintenance like oil changes, spark plug replacements, and brake pad swaps instead of paying steep dealership labor rates.