Vehicle Segment:
Entry-level youth off-road motorcycle, designed for beginner riders and recreational use.
Key Competitors 2006:
Honda CRF50F, Kawasaki KLX110 (though larger, often cross-shopped), Suzuki JR50.
Design Philosophy:
Emphasis on ease of use, low maintenance, and safety for young riders. Features like electric start and automatic clutch simplify operation.
Manual Value Proposition:
Provides dealership-level technical information, enabling owners to perform a wide range of maintenance and repairs, thereby reducing reliance on professional service and extending the vehicle's lifespan.
Engine Mechanical:
Complete disassembly, inspection, repair, and reassembly of all internal engine components, including cylinder, piston, crankshaft, connecting rod, and valve train.
Engine Fuel System:
Carburetor adjustment, cleaning, and overhaul; fuel tank and line maintenance; fuel petcock operation.
Engine Ignition System:
Spark plug specifications, ignition timing checks, CDI unit testing, and troubleshooting.
Engine Lubrication System:
Oil change procedures, oil filter replacement, oil pump inspection and operation.
Transmission System:
Clutch adjustment and replacement, gearbox inspection and repair, shift mechanism operation.
Chassis Suspension:
Front fork disassembly, service, and adjustment; rear shock absorber inspection and replacement; swingarm and linkage maintenance.
Brakes:
Front and rear brake system inspection, adjustment, and component replacement (pads, shoes, cables, levers).
Wheels Tires:
Tire pressure specifications, wheel bearing maintenance, spoke tension checks, and replacement procedures.
Electrical System:
Wiring diagrams, battery maintenance, lighting system checks, fuse identification and replacement.
Bodywork Frame:
Plastic panel removal and installation, frame inspection, handlebar and control adjustments.
Routine Maintenance:
Regular service intervals, oil changes, chain lubrication and adjustment, air filter cleaning/replacement, spark plug inspection.
Troubleshooting Diagnostics:
Systematic diagnostic charts and procedures for identifying and resolving common operational issues, including starting problems, poor performance, and electrical faults.
Engine Repair:
Detailed, step-by-step instructions for engine overhauls, component replacements (piston rings, valves, gaskets), and timing adjustments.
Transmission Repair:
Procedures for clutch service, gearbox disassembly and reassembly, and shift drum and fork inspection.
Suspension Service:
Front fork oil change and seal replacement, rear shock absorber inspection, and swingarm bearing service.
Brake Service:
Front and rear brake cable adjustment, caliper/drum inspection, and lining/pad replacement.
Electrical System Repair:
Troubleshooting electrical faults using wiring diagrams, battery testing, and component checks.
Carburetor Adjustment Overhaul:
Step-by-step instructions for carburetor cleaning, jet replacement, float level adjustment, and idle speed settings.
Depth Of Coverage:
Comprehensive, mirroring dealership-level repair and maintenance procedures. Includes detailed specifications, torque values, and diagnostic guidance.
Engine Type:
Air-cooled, four-stroke, SOHC
Bore X Stroke:
39.0 mm x 41.4 mm
Valve Clearance Intake:
0.05 mm (cold)
Valve Clearance Exhaust:
0.08 mm (cold)
Horsepower Estimated:
Approximately 3.2 HP @ 8,500 RPM (specifications can vary slightly by source)
Torque Estimated:
Approximately 2.5 lb-ft @ 7,500 RPM (specifications can vary slightly by source)
Carburetor Model:
Mikuni VM14 (typical for this model)
Fuel Type:
Unleaded gasoline (minimum 87 octane recommended)
Fuel Tank Capacity:
1.0 L (0.26 gal)
Fuel Delivery:
Gravity feed from fuel tank
Vehicle Class Safety:
Off-road recreational vehicle, not intended for street use. Safety features are primarily design-related for rider control and stability.
Throttle Limiter:
Adjustable throttle stop screw to limit acceleration and top speed for novice riders.
Engine Stop Switch:
Handlebar-mounted engine kill switch for immediate shutdown.
Low Seat Height:
Facilitates confident foot placement for beginner riders.
Automatic Clutch:
Eliminates the need for manual clutch operation, simplifying learning to ride.
Chain Guard:
Protects rider from contact with the drive chain and sprockets.
Engine Oil Change:
Every 10 hours of operation or monthly, whichever comes first. Use SAE 10W-30 API SE SF or SG classification oil.
Air Filter Cleaning:
Every 10 hours of operation. Clean with mild soap and water, dry thoroughly, and lubricate with a suitable foam filter oil.
Spark Plug Inspection:
Every 10 hours of operation. Clean and check gap, replace if necessary. Recommended plug: NGK CR7HSA or DENSO U20FS-U.
Chain Lubrication Adjustment:
Every 5 hours of operation or after washing/riding in rain. Check and adjust chain slack (10-20 mm).
Valve Clearance Check:
Every 20 hours of operation or annually. Adjust as per specifications (Intake: 0.05mm, Exhaust: 0.08mm when cold).
Engine Oil Type:
SAE 10W-30 API SE, SF, or SG
Engine Oil Capacity:
0.80 L (0.85 US qt) for oil change, 0.90 L (0.95 US qt) for filter change/overhaul.
Transmission Oil Type:
Yamaha-recommended engine oil (same as engine oil, SAE 10W-30)
Transmission Oil Capacity:
0.35 L (0.37 US qt)
Brake Fluid Type:
N/A (uses cable-actuated brakes)
Common Wear Items:
Brake pads/shoes, clutch plates (due to automatic operation), chain and sprockets, spark plug, air filter.
Carburetor Performance:
Can be susceptible to clogging from debris or stale fuel; requires regular cleaning and adjustment. Pilot jet may require specific attention.
Throttle Sticking:
Can occur if throttle cable is not properly lubricated or adjusted, or if dirt ingress occurs near the throttle tube.
Suspension Wear:
Front fork seals can wear over time, leading to oil leaks. Rear shock may lose damping effectiveness with heavy use.
Yamaha Motorcycles:
Yamaha Motor Company, established in 1955, has a long and storied history in motorsport and motorcycle manufacturing, renowned for innovation and performance.
Tt-R Series Introduction:
The TT-R line represents Yamaha's commitment to entry-level and youth off-road riding, building on decades of dirt bike expertise.
Tt-R50E Introduction Year:
First introduced in 2004.
Manufacturing Location Typical:
Japan (primary manufacturing hub for Yamaha's smaller displacement models)