Yamaha Mio I — 125 Parts Catalogue

Note: Actual part numbers are proprietary to Yamaha. Replace placeholder numbers with official ones from your regional Yamaha distributor. Document No.: YM-125-MIOi-2025-01 Model Year: 2016–2025 (Applicable to Mio i 125 / Mio i 125S) Engine: 125cc, 4-stroke, air-cooled, FI (Fuel Injection) 1. ENGINE & CYLINDER | Item | Part Description | Part Number (Example) | Qty | |------|----------------|----------------------|-----| | Cylinder head assembly | 1 | B7N-E1111-00 | 1 | | Cylinder kit (piston + rings + cylinder) | 1 | B7N-E1630-00 | 1 | | Piston ring set (std) | 1 | 3C1-E1601-00 | 1 | | Timing chain | 1 | 94591-22120 | 1 | | Camshaft | 1 | B7N-E2170-00 | 1 | | Valve, intake | 2 | B7N-E2121-00 | 2 | | Valve, exhaust | 2 | B7N-E2131-00 | 2 | 2. FUEL INJECTION & AIR SYSTEM | Item | Part Description | Part Number | Qty | |------|----------------|-------------|-----| | Throttle body assembly | 1 | B7N-E3700-00 | 1 | | Injector | 1 | B7N-E3910-00 | 1 | | Fuel pump (in-tank) | 1 | B7N-E3907-00 | 1 | | Air cleaner element | 1 | B7N-E4450-00 | 1 | | Intake manifold | 1 | B7N-E3585-00 | 1 | 3. CRANKSHAFT & TRANSMISSION | Item | Part Description | Part Number | Qty | |------|----------------|-------------|-----| | Crankshaft assembly | 1 | B7N-E1400-00 | 1 | | Connecting rod | 1 | B7N-E1651-00 | 1 | | Drive belt (V-belt) | 1 | B7N-E7641-00 | 1 | | Variator roller set (6 rollers) | 1 | B7N-E7623-00 | 6 | | Clutch shoe set (3 shoes) | 1 | B7N-E6620-00 | 3 | | Clutch bell / outer clutch housing | 1 | B7N-E6611-00 | 1 | 4. CHASSIS & FRAME | Item | Part Description | Part Number | Qty | |------|----------------|-------------|-----| | Frame (complete, no VIN) | 1 | B7N-F1110-00 | 1 | | Underbone cover (center) | 1 | B7N-F8370-00 | 1 | | Side stand assembly | 1 | B7N-F7311-00 | 1 | | Main stand assembly | 1 | B7N-F7111-00 | 1 | 5. FRONT FORK & STEERING | Item | Part Description | Part Number | Qty | |------|----------------|-------------|-----| | Handlebar | 1 | B7N-F6110-00 | 1 | | Front fork (left) | 1 | B7N-F3100-00 | 1 | | Front fork (right) | 1 | B7N-F3200-00 | 1 | | Steering stem bearing set | 1 | 93332-00038 | 1 set | 6. BRAKES & WHEELS | Item | Part Description | Part Number | Qty | |------|----------------|-------------|-----| | Front brake caliper assembly | 1 | B7N-F5800-00 | 1 | | Rear brake shoe set | 1 | B7N-F5300-00 | 1 | | Front disc brake pad set | 1 | B7N-F5820-00 | 2 pads | | Front wheel (cast, 12 in) | 1 | B7N-F5160-00 | 1 | | Rear wheel (cast, 12 in) | 1 | B7N-F5380-00 | 1 | 7. ELECTRICAL SYSTEM | Item | Part Description | Part Number | Qty | |------|----------------|-------------|-----| | ECU (Engine Control Unit) | 1 | B7N-H5910-00 | 1 | | Stator / Magneto | 1 | B7N-H1410-00 | 1 | | Rectifier / regulator | 1 | B7N-H1960-00 | 1 | | Battery (12V 5Ah) | 1 | 1S4-H2100-00 | 1 | | Headlight bulb (HS1 35/35W) | 1 | 5GS-H4314-00 | 1 | | Tail/brake light LED unit | 1 | B7N-H4710-00 | 1 | 8. BODY & COWLING (Standard Mio i 125) | Item | Part Description | Part Number | Qty | |------|----------------|-------------|-----| | Front leg shield | 1 | B7N-F8330-00 | 1 | | Front fender | 1 | B7N-F1510-00 | 1 | | Left side cowling | 1 | B7N-F8340-00 | 1 | | Right side cowling | 1 | B7N-F8350-00 | 1 | | Seat assembly | 1 | B7N-F4740-00 | 1 | 9. FASTENERS & MAINTENANCE KITS | Kit | Contents | Part Number | |-----|----------|-------------| | Engine overhaul gasket kit | Full gasket set + oil seals | B7N-W0001-00 | | CVT service kit | Belt, rollers, clips, grease | B7N-W0002-00 | | Brake overhaul kit (front) | Pistons, seals, bleed screw | B7N-W0003-00 | DISCLAIMER This parts catalogue is for reference only . Always verify part numbers with an authorized Yamaha dealer using the motorcycle’s VIN and model code (e.g., B7N). Yamaha reserves the right to change specifications and parts without notice.