Model:
YZF750R / YZF750SP
Model Code:
YZF750R, YZF750SP
Production Years:
1993, 1994, 1995, 1996, 1997, 1998
Chassis Codes:
4HN, 4HG (for R), 4HX, 4HT (for SP)
Engine Codes:
4JD (for R), 4JD-xxx (for SP - often specific build codes)
Market Segment:
Supersport motorcycle, high-performance sportbike.
Target Audience:
Performance-oriented riders, track day enthusiasts, and DIY mechanics.
Key Competitors:
Honda CBR900RR Fireblade, Kawasaki ZX-9R Ninja, Suzuki GSX-R750.
Model Distinction R:
The YZF750R was the standard sport-touring oriented version with a wider powerband and more comfortable ergonomics.
Model Distinction Sp:
The YZF750SP was the homologation special for racing, featuring a tighter gearbox, higher compression, upgraded suspension (often with adjustable rebound and compression), and sometimes lighter components.
Engine Layout:
Inline-four, DOHC, 5-valve per cylinder.
Engine:
Complete disassembly, inspection, repair, and reassembly of the 749cc inline-four cylinder engine.
Fuel System:
Carburetor servicing, jetting, float adjustment, fuel pump operation, fuel tank, and fuel lines.
Ignition System:
Ignition timing, CDI unit, spark plugs, ignition coils, and wiring.
Cooling System:
Radiator, coolant, fan operation, water pump, thermostat, and hoses.
Exhaust System:
Exhaust pipes, mufflers, and catalytic converter (if applicable).
Transmission:
Gearbox disassembly, inspection, repair, clutch operation, and lubrication.
Drivetrain:
Chain and sprockets maintenance, rear wheel hub, and drive chain adjustment.
Suspension:
Front fork (including internal components, seals, and oil), rear shock absorber, and linkage maintenance.
Brakes:
Front and rear brake systems, caliper servicing, master cylinders, brake lines, brake pads, and rotors.
Electrical System:
Wiring diagrams, battery, charging system (stator, rectifier/regulator), lighting, starter motor, and switches.
Frame And Bodywork:
Frame inspection, fairing removal and installation, seat, and handlebars.
Troubleshooting:
Diagnostic procedures for common issues, symptom analysis, and repair guidance.
Maintenance:
Scheduled maintenance tasks, fluid changes, filter replacements, chain adjustment, spark plug checks.
Repair:
Step-by-step instructions for component repair and replacement across all major systems.
Disassembly Reassembly:
Detailed procedures for dismantling and reassembling the motorcycle and its various components.
Cleaning Lubrication:
Specific guidance on cleaning procedures and lubrication points for optimal performance and longevity.
Torque Specifications:
Essential torque values for critical fasteners to ensure proper assembly and prevent damage.
Special Tools:
Identification and usage of specialized tools required for certain repair or maintenance procedures.
Depth Level:
Comprehensive: Covers everything from routine maintenance to full engine rebuilds and advanced diagnostics.
Diagnostic Capability:
Detailed troubleshooting guides for electrical and mechanical issues, including symptom-based problem solving.
Engine Type:
4-stroke, Liquid-cooled, DOHC, 5-valve inline-four
Bore X Stroke:
73.0 mm x 44.7 mm
Compression Ratio:
11.2:1 (R) / 11.3:1 (SP - typically)
Valve Configuration:
DOHC, 5 valves per cylinder (3 intake, 2 exhaust)
Horsepower:
Approx. 105-108 PS (77-79 kW) @ 10,000 rpm (rear wheel)
Torque:
Approx. 7.8 kg-m (76.5 Nm; 56.4 lb-ft) @ 8,500 rpm (rear wheel)
Carburetor Type:
Four Mikuni CV (Constant Velocity) carburetors, e.g., BST36
Fuel Capacity:
18 Liters (4.75 US gallons)
Fuel Grade:
Unleaded gasoline, 95 RON minimum
Safety Ratings:
N/A (Motorcycles typically do not have standardized crash ratings like cars)
Braking System:
Dual 298mm front discs with 4-piston calipers, Single 240mm rear disc with 2-piston caliper.
Suspension Design:
Upside-down telescopic front forks, Monocross rear suspension with adjustable linkage.
Lighting:
Halogen headlight, LED tail light.
Oil Change Interval:
Every 3,000-5,000 km (1,800-3,000 miles) or annually.
Air Filter Cleaning Interval:
Every 5,000-7,500 km (3,000-4,500 miles).
Spark Plug Replacement:
Every 10,000-15,000 km (6,000-9,000 miles).
Chain Maintenance:
Clean and lubricate every 500-1,000 km (300-600 miles); adjust tension as needed.
Engine Oil Type:
Yamaha Genuine Yamalube 10W-40 API SG or higher, or equivalent motorcycle-specific oil.
Engine Oil Capacity:
Approx. 3.1 Liters (3.2 US qt) without filter change; Approx. 3.4 Liters (3.6 US qt) with filter change.
Coolant Type:
Permanent type antifreeze (ethylene glycol based) mixed with distilled water at a 50/50 ratio.
Fork Oil Type:
Yamaha Genuine Fork Oil 10W or equivalent
Fork Oil Quantity:
Approx. 464 ml per fork leg
Cam Chain Tensioner:
Some models may experience wear in the automatic cam chain tensioner, leading to rattling noises.
Carburetor Sync:
Carburetors may require periodic syncing to maintain smooth engine operation and optimal performance.
Fuel Tap:
Vacuum-operated fuel taps can sometimes fail to open, leading to fuel starvation.
Clutch Cable:
Wear or stretching of the clutch cable can affect clutch engagement.
Yamaha Motorcycle Legacy:
Yamaha is a renowned Japanese manufacturer with a long history of producing high-performance motorcycles across various categories, from sportbikes to off-road and touring models.
Yzf Series Introduction:
The YZF750 series built upon Yamaha's successful FZR lineage, aiming to compete at the forefront of the 750cc supersport class, which was a precursor to the current litre-class superbikes.
Yzf750R Development:
The YZF750R was designed as a more road-focused sportbike, offering a blend of performance and usability.
Yzf750Sp Development:
The YZF750SP was specifically developed to meet homologation requirements for FIM Superbike World Championship (WSBK) racing, featuring enhancements for track performance.
Manufacturing Country:
Japan
Motorcycle Press Reviews:
The YZF750 series was generally well-received by the motorcycle press for its performance, handling, and powerful engine, though often compared against the dominant Honda CBR900RR.
Performance Ratings:
Highly regarded for its track capability and road performance during its production run.
Certification Standards:
Met all relevant Japanese and international road safety and emissions standards for its time.
