Yamaha YFM 450 FWAN IRS GRIZZLY (4WD) (2007) — Specs
Identity
Manufacturer: Yamaha
Model: YFM 450 FWAN IRS GRIZZLY (4WD)
Category: ATV/Quad
Type: ATV/Quad
Years: 2007 →
Engine
Displacement (cc): 421
Cylinders: 1
Power (hp): 27
Power (kW): 20
Dimensions
Overall length: 2100 mm
Overall width: 790 mm
Overall height: 1140 mm
Wheelbase: 1430 mm
Ground clearance: 160 mm
Weight (kg): 285
Tank (L): 15
Tires
Front pressure (bar): 0.22
Rear pressure (bar): 0.22
Drivetrain
Final drive: Shaft drive
Ignition
Spark plug: NGK DR8EA
Plug gap: 0.6-0.7 mm
Fluids & Filters
Engine oil: SAE10W-40, API SE
Engine oil (with filter, L): 2.4
Engine oil (without filter, L): 2.3
Oil filter: OEM oil filter
Air filter: OEM air filter
Coolant (L): 1.32
Brake fluid: DOT 4
Fuel consumption
Estimated range: ~375 km on a full tank (15.0 L)
Service
Battery: OEM battery specification
Service interval (km): 6000
Service interval (months): 12
Valve check (km): 12000
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 12,000 km. Valve clearance — intake cold 0.06-0.10 mm, exhaust cold 0.16-0.20 mm. Engine oil: oil grade SAE10W-40, API SE, 2.4 L with filter change, 2.3 L without filter change. Spark plug: NGK DR8EA (gap 0.6-0.7 mm). Brake fluid: DOT 4. Coolant capacity: 1.32 L. Drive: shaft drive. Tire pressure: front 0.22 bar, rear 0.22 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: SAE10W-40, API SE, 2.4 L (with filter), 2.3 L (without filter)
- OEM OEM recommended engine oil (SAE 10W-40)
- Premium Motul 7100
- Premium Motul 5100
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
- Standard Elf Moto 4 Tech
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
Air filter
Spark plug
Spec: NGK DR8EA, gap 0.6-0.7 mm
- OEM NGK DR8EA
- Premium NGK DR8EIX
- Standard NGK DR8EA
Front brake pads
Rear brake pads
Front tire
Spec: 0.22 bar
Rear tire
Spec: 0.22 bar
Battery
- Premium Yuasa YTX9-BS or YTZ7S (typical 250-500cc)
Brake fluid
Spec: DOT 4
- Standard TotalEnergies HBF4
Coolant
Spec: 1.32 L coolant capacity
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: 12 000 km
- OEM Intake clearance: cold 0.06-0.10 mm
- OEM Exhaust clearance: cold 0.16-0.20 mm
Suspension
Spec: - / -
- OEM Fork: -
- OEM Fork oil grade: -
Drive chain
