2011 Yamaha TT-R125LW(M) Owner's Service Manual (P/N 5HP-28199-81)

This Yamaha Owner's Service Manual (5HP-28199-81) covers operation, inspection, maintenance, and repair of the 2011 TT-R125LW(M). It includes TT-R125LWM, TT-R125LWMC, and TT-R125LW models, with model codes 5HP4 and 5HP5.

• Engine repair: Engine removal, cylinder head and valve-train service, cylinder and piston inspection, crankcase separation, and crankshaft and balancer installation.

• Clutch and transmission: Clutch and primary-drive inspection, kick axle and shift shaft service, and transmission, shift cam, and shift fork assembly.

• Carburetor and lubrication: Mikuni VM20SS disassembly, fuel-level adjustment, coasting-enricher inspection, oil pump disassembly and assembly, and oil-delivery checks.

• Brakes and wheels: Front brake caliper and master-cylinder repair, hydraulic bleeding, rear drum brake service, and front and rear wheel bearing inspection.

• Suspension and steering: Front fork overhaul, steering-head bearing service, swingarm linkage inspection, and rear shock absorber removal and spring-preload adjustment.

• Ignition diagnosis: Wiring and cable routing diagrams, no-spark troubleshooting, engine stop switch tests, ignition coil checks, and CDI magneto inspection.

Owners can use the operating and basic maintenance sections; the repair procedures are suited to mechanics with measuring equipment and the specified special tools.

Model Identification and Parts Matching

The specification table assigns TT-R125LWMC to California, TT-R125LW to Europe, and TT-R125LWM to the rest of the U.S., Canada, Australia, and New Zealand. Code 5HP5 identifies Canada; 5HP4 covers the U.S., Australia, New Zealand, and Europe.

The identification section shows VIN, engine-number, and model-label locations. An A-E cylinder/piston matching chart links cylinder markings with piston size groups and color codes, helping select the matching piston before ordering parts.

Engine Assembly and Carburetor Service

Maintenance intervals and tightening-torque tables support the repair sections. Inspection criteria cover the cylinder head, camshaft, valve train, clutch, and transmission, with valve-guide replacement, valve-seat lapping, and rocker-arm measurements described in the engine chapter.

The Clutch and Primary Driven Gear and Oil Pump Disassembly exploded views include job instruction charts showing removal scope and part order. Sectional views illustrate circlip orientation. Tool references include crankcase separator YU-01135-A / 90890-01135.

Cylinder-head assembly notes flag the risk of incorrect valve timing and damage if the crankshaft moves during camshaft installation. Working on motorcycle engines requires precision and care; consult a qualified technician if you lack the skills for the repair.

Carburetor service covers the float, needle valve, jets, starter plunger, and coasting-enricher diaphragm. The pilot-air-screw section explains the machine-specific factory setting; the turns shown are examples. A high-altitude main-jet option is identified as 620-1423A-71-A0.

Brake, Fork, and Rear Suspension Work

Brake coverage extends to caliper piston seals, master-cylinder cups, rear brake shoes, and brake camshaft positioning. Wheel inspections include rim runout, axle straightness, and bearing condition.

The Front Fork Disassembly view accompanies damper-rod and oil-seal service instructions. Assembly notes warn that a damper rod dropped inside the tube can be damaged; Yamaha recommends dealer service for the fork.

Rear suspension coverage includes swingarm, relay-arm, and connecting-arm bushings. The rear shock section covers inspection, bushing replacement, and complete assembly replacement. The nitrogen-charged shock must not be opened; internal damper rebuilding is outside this manual's service scope.

CDI Ignition Tests and Wiring

The Electrical Components and Wiring Diagram, Cable Routing Diagram, and Ignition System inspection chart show component locations, wire-color codes, harness routing, and the no-spark test sequence. The diagnostic chart separates switch, ignition-coil, pickup-coil, and charging-coil checks before CDI-unit replacement, helping narrow down an ignition fault.

Examples of Engine Limits and Fluid Capacities

These are a few of the manual's adjustment specifications, inspection limits, and fluid capacities.

Cold valve clearance is 0.08-0.12 mm at the intake and 0.10-0.14 mm at the exhaust. Cylinder-head warpage and crankshaft runout each have a 0.03 mm limit.

The fork assembly instructions specify 156 cm³ of oil for each leg. Fuel tank capacity is 6.6 liters total, including a 1.9-liter reserve.

PDF Navigation, Languages, and Included Pages

Text search and diagram detail: Main text is searchable. PDF bookmarks open the contents pages, whose linked entries lead to the relevant sections. Small wire-color labels in the wiring diagram are readable when enlarged.

One printable 466-page PDF contains English, French, and German text. The total includes two cover pages, 24 introductory, index, and contents pages, and five memo pages.