Yamaha XJ 750 (1984–1985) — Specs
Identity
Manufacturer: Yamaha
Model: XJ 750
Category: Motorcycle
Type: Motorcycle
Years: 1984 → 1985
Engine
Displacement (cc): 749
Cylinders: 4
Power (hp): 87
Power (kW): 64
Torque (Nm): 64
Dimensions
Overall length: 2180 mm
Overall width: 830 mm
Overall height: 1200 mm
Wheelbase: 1480 mm
Ground clearance: 150 mm
Weight (kg): 246
Tank (L): 22
Tires
Front pressure (bar): 2.5
Rear pressure (bar): 2.9
Drivetrain
Final drive: Shaft drive
Ignition
Spark plug: NGK BPR8ES
Plug gap: 0.7 mm
Fluids & Filters
Engine oil: SAE20W-40, API SE
Engine oil (with filter, L): 2.8
Engine oil (without filter, L): 2.5
Oil filter: Hiflofiltro HF144
Air filter: Hiflofiltro HFA4704
Brake fluid: DOT 4
Fuel consumption
Estimated range: ~458 km on a full tank (22.0 L)
Service
Battery: OEM battery specification
Service interval (km): 6000
Service interval (months): 12
Valve check (km): 24000
Parts and consumables for this motorcycle
Data is gathered with care, but without guarantee. Always confirm critical information with your dealer or workshop.
Service notes
Service interval: every 6,000 km or 12 months, whichever comes first. Valve clearance check every 24,000 km. Engine oil: oil grade SAE20W-40, API SE, 2.8 L with filter change, 2.5 L without filter change. Spark plug: NGK BPR8ES (gap 0.7 mm). Brake fluid: DOT 4. Drive: shaft drive. Tire pressure: front 2.5 bar, rear 2.9 bar (cold). Always confirm critical values with the workshop manual or an authorised dealer.
OEM and quality aftermarket parts that fit this bike. Always confirm with your dealer before ordering.
Engine oil
Spec: SAE20W-40, API SE, 2.8 L (with filter), 2.5 L (without filter)
- OEM OEM recommended engine oil (SAE 20W-40)
- Premium Motul 7100 4T (100% Synthetic, Ester)
- Premium Motul 5100 4T Technosynthese (Semi-Synthetic)
Which Motul for this bike?
| Motul 7100 4T ✓ | Motul 5100 4T | |
|---|---|---|
| Product | Motul 7100 4T — 100% fully synthetic | Motul 5100 4T — semi-synthetic |
| Best for | Sport, Naked, Adventure (600cc+), track | Standard, Cruiser, Scooter, daily use |
| RPM protection | Excellent — ester base, stable under load | Good — for normal riding conditions |
- Standard Repsol Moto Racing 4T (Synthetic)
- Standard Elf Moto 4 Tech (Semi-Synthetic)
Fully Synthetic vs Semi-Synthetic
| Fully Synthetic | Semi-Synthetic | |
|---|---|---|
| Base oil | 100% chemical synthesis (ester or PAO) | Mineral oil + synthetic additives |
| Heat resistance | Excellent — stable at extreme heat & RPM | Good — suitable for normal temperatures |
| Cold start | Better — reaches engine faster when cold | Good — adequate for normal climates |
| Change interval | Longer (up to 10,000 km) | Shorter (5,000–7,000 km typical) |
| Price | Higher | Lower |
Oil filter
Spec: Hiflofiltro HF144
- Premium Hiflofiltro HF144
- Premium K&N KN-144
Air filter
Spec: Hiflofiltro HFA4704
- Standard Hiflofiltro HFA4704
Spark plug
Spec: NGK BPR8ES, gap 0.7 mm
- OEM NGK BPR8ES
- Premium NGK BPR8EIX
- Standard NGK BPR8ES
Front brake pads
Spec: EBC FA070
- Premium EBC FA070
Rear brake pads
Spec: EBC FA070
- Premium EBC FA070
Front tire
Spec: 2.5 bar
Rear tire
Spec: 2.9 bar
Battery
- Premium Yuasa YTX12-BS or YTZ10S (typical 500-750cc)
Brake fluid
Spec: DOT 4
- Standard TotalEnergies HBF4
Coolant
Service interval
Spec: 6 000 km / 12 months
- OEM Engine oil + oil filter change
- OEM Air filter inspection
- OEM Spark plug check
- OEM Brake fluid replacement: every 2 years
Valve check
Spec: 24 000 km
Suspension
Spec: 37 mm telescopic fork / 286 ml SAE 10W
- OEM Fork: 37 mm telescopic fork
- OEM Fork oil grade: 286 ml SAE 10W
Drive chain
