Yamaha TT-R50 / TTR-50E Service & Owner’s Manual Set, 2012–2013 (P/N LIT-11616-25-38)

The owner’s manual explains operation and routine care. The service manual extends that information into component inspection, fault diagnosis, and internal repair.

PDF Search, Bookmarks and Wiring Detail

Search and navigation: Both files have searchable main text and chapter bookmarks. Text search does not cover every illustration label or the owner’s warranty Q&A page. The service file’s top-level table-of-contents bookmark has no working destination, although its chapter bookmarks provide navigation. Small wiring codes require zooming for comfortable reading.

The ZIP download contains two printable English PDFs totaling 302 pages, including covers and blank pages. This total also includes two appended wiring-diagram sheets in the service file and three publisher promotional pages in the owner’s file.

Engine, Drivetrain and Electrical Service

The following selected contents outline the repair coverage. Other topics include spark-arrester cleaning and checks of the starting circuit cut-off system.

• Engine repair: Compression testing, engine removal and installation, cylinder-head service, camshaft and rocker-arm inspection, valve and valve-seat work, piston service, crankcase separation, and crankshaft inspection.

• Clutch and transmission: Wet multiple-disc centrifugal automatic clutch service, primary-drive inspection, shift-shaft and stopper-lever checks, and removal and assembly of the shift drum, forks, and transmission gearsets.

• Chassis service: Wheel and bearing work, drum-brake disassembly and inspection, handlebar replacement, front-fork inspection, steering-head bearing service, rear-shock removal, swingarm service, and drive-chain installation.

• Fuel system: VM11 carburetor removal, disassembly, cleaning, inspection, assembly, and fuel-level adjustment, together with fuel-cock, strainer, and filter checks.

• Electrical diagnosis: Circuit diagrams and troubleshooting paths for ignition, electric starting, charging, and carburetor heating, supported by component tests and starter-motor repair procedures.

• Repair illustrations: Exploded assemblies with job/parts charts, engine-oil lubrication drawings, cable-routing layouts, electrical component-location views, and monochrome and color TT-R50EB wiring diagrams.

• Factory reference data: General, engine, and chassis torque tables; lubrication charts; capacities; wear limits; clearances; electrical test specifications; maintenance schedules; and Yamaha special-tool numbers.

Yamaha wrote the service volume primarily for dealers and qualified mechanics with basic mechanical knowledge. Experienced owners with that knowledge can use it as a shop reference, but internal repairs and electrical tests require the specified tools and equipment.

Engine Inspection and Reassembly

The documented configuration uses wet-sump lubrication, DC CDI ignition, a VM11 carburetor, spoke wheels, tube-type tires, and mechanical drum brakes.

Step-by-step procedures cover cylinder-head and piston work, valve-guide replacement and valve-seat lapping, timing-chain installation, and crankcase disassembly and assembly. Inspection references include camshaft wear and runout, rocker-arm fit, spring condition, cylinder wear, piston-ring fit, and crankshaft and connecting-rod clearances.

Exploded drawings show component relationships alongside replacement symbols, lubricant callouts, tightening references, and job charts. These details support repair planning by identifying the parts, consumables, and equipment involved before an assembly is opened.

The camshaft-sprocket installation section warns that crankshaft movement during installation can cause damage or incorrect valve timing. The crankcase section also identifies mating-surface damage as a risk during separation.

Clutch, Gearbox and Lubrication Components

Clutch inspection extends to friction-plate wear, steel-plate warpage, the spring plate, housing dogs, boss splines, pressure plate, and primary gears. Reassembly illustrations identify plate positioning and the clutch-release adjustment.

Transmission procedures address the main- and drive-axle assemblies, gear dogs, shaft runout, shift-fork condition, and shift-drum grooves. The lubrication section includes oil-pump removal and assembly, rotor-clearance checks, and oil-strainer inspection.

Wheels, Brakes and Suspension

Brake inspection includes lining thickness, drum diameter, wear-indicator alignment, and brake-camshaft condition. Wheel procedures cover bearing and seal replacement, runout checks, spokes, the rear drive hub, and sprocket wear.

Front-fork instructions cover leg removal, tube and spring inspection, and installation. Rear-shock work covers removal and installation of the complete assembly; swingarm procedures include pivot inspection and lubrication.

Carburetor and Electrical Fault Isolation

Carburetor inspection distinguishes fuel-passage blockage, float and needle-valve condition, jet wear, throttle-valve movement, and starter-plunger faults. Separate illustrations explain float-height measurement and fuel-level checking with a gauge.

Electrical fault paths address missing or intermittent spark, a starter that will not turn, failure to charge, and an inoperative carburetor heater. They connect symptoms to individual component checks, allowing a mechanic to distinguish wiring, switch, relay, coil, and component faults before selecting a repair.

Tests cover the VRLA battery, fuses, starter relay, ignition coil, spark-plug cap, pickup coil, lighting and charging coils, rectifier/regulator, thermo switch, and carburetor warmer. Starter-motor inspection includes the commutator, brushes, armature resistance, and insulation.

The diagram material includes the Engine Oil Lubrication Chart, handlebar and battery routing views, ignition and starting circuit diagrams, and the TT-R50EB wiring sheets. Eight cable-routing layouts also address the front brake wire, ignition coil, CDI unit, and fuel tank.

Special Tools and Owner Guidance

The tool references distinguish international 90890-series numbers from U.S./Canada equivalents. Examples include the YU-33223 compression tester, YM-04019 valve-spring compressor, YU-33270-B flywheel puller, YM-01312-A fuel-level gauge, and YM-34487 ignition checker. These references help establish equipment requirements before diagnostic or internal-engine work begins.

The owner’s volume adds control descriptions, speed-limiter adjustment, pre-operation checks, starting and shifting, break-in, routine maintenance, wheel removal, a basic no-start chart, cleaning, storage, identification, and Yamaha warranty information. Parent and rider guidance addresses the youth model’s off-road use.

Fuel-system work, battery charging, ignition tests, brake service, and work with the motorcycle raised involve specific fire, electrical, chemical, or stability hazards. Follow Yamaha’s safety notices and use the specified service equipment.

Examples of Valve and Ignition Test Specifications

For cold-engine valve adjustment, the TT-R50EB service manual specifies intake clearance of 0.05–0.09 mm and exhaust clearance of 0.08–0.12 mm.

Ignition-coil test data distinguish primary resistance of 0.32–0.48 Ω from secondary resistance of 5.68–8.52 kΩ, both measured at 20 °C (68 °F).