Big Bear 400 Semi-Auto 4x4
- Make:
- YAMAHA
- Model:
- YFM400F
- Year:
- 2009

REPUTATION COUNTS
In a serious work environment, respect doesn’t come cheaply, so when you’ve got a reputation as solid as the Big Bear 400, you know you’ve done okay.
Yamaha’s middleweight semi-automatic is a tough-as-nails workplace classic with the proven combination of 386cc air-/oil-cooled engine mated to a 5-speed, constant mesh transmission, with reverse.
Patented On-Command push-button switching provides fingertip access to either light steering 2wd or full traction 4wd – and should the going get really sticky… use the Diff Lock!
Factor in the superb trail holding of IRS (independent rear suspension), ventilated disc front and sealed wet brake rear stoppers, as well as full protective Grizzly bodywork and you’ve got one thing.
A rugged workday legend with the performance to match the reputation.
| Diff lock-equipped On-Command™ 2WD/4WD switching. Big Bear flicks from light steering 2WD to go-anywhere 4WD at the push of a button, and features Diff Lock so you can access full drive from your 4WD capability. |
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Big Bear’s plush, comfortable Independent Rear Suspension provides control and comfort, while a fully sealed oil bath rear wet brake allows long-lasting, outstanding stopping power even in the worst conditions.
For riders who crave ultimate control, a rugged 5-speed gearbox features a semi-automatic action and ultra-low ‘stump-pulling’ first gear. Naturally, there’s a reverse gear, so you can back out of what you get yourself into
Features include:
♦ Direct-route front drive shaft – no Universal Joint.
♦ Five-speed semi-auto transmission plus reverse.
♦ On-Command switching 2WD/4WD/Diff Lock.
♦ Tough, 387cc air-/oil-cooled SOHC, 4-stroke.
♦ Bright 30W halogen bulb headlights.
♦ Steel cargo racks with extra-durable wrinkle finish.
♦ Durable stainless steel exhaust.
♦ Fully sealed oil bath rear wet brake.
♦ Hydraulic front disc brakes.
♦ High-impact plastic skid plate.
♦ Electric starting with auxiliary recoil starter.
♦ Rugged steel front bumper.
♦ Cargo rack capacity of 120kg combined (40 front, 80 rear)
♦ Heavy-duty trailer hitch rated to 410kg.
| ||
| ENGINE/IGNITION/TRANSMISSION | ||
| Type | Air-/oil-cooled w/fan, SOHC 4-stroke single | |
| Displacement - (cc) | 387 | |
| Bore Stroke - (mm) | 83.0 x 71.5 | |
| Compression | 8.6:1 | |
| Lubrication | Wet sump | |
| Fuel Management | Mikuni BSR33 | |
| Ignition | DC-CDI | |
| Starter | Electric w/auxiliary pull | |
| Fueltank - (L) | 15 | |
| Oil Capacity - (L) | 3.5 | |
| Transmission | 5-speed automatic clutch w/reverse | |
| Final Transmission | Yamaha On-Command® push button 2WD, 4WD, shaft | |
| Instrumentation | Speedometer, odometer and fuel gauge | |
| Lighting | Dual 30W Krypton multireflector headlights and 21/5W brake light | |
| CHASSIS | ||
| Length - (mm) | 2016 | |
| Width - (mm) | 1116 | |
| Height - (mm) | 1187 | |
| Seat Height - (mm) | 895 | |
| Wheelbase - (mm) | 1230 | |
| Clearance - (mm) | 267 | |
| Dry Weight - (kg) | 265 | |
| Turning Circle (mm) | 3200 | |
| Towing Capacity (kg) | 410 | |
| Carrier Front/Rear - (kg) | 40kg front / 80kg rear | |
| FRONT END | ||
| Suspension Front | Independent double wishbone, w/5-way preload adjustment and 150mm travel | |
| Tyres Front | AT25 x 8-12 Chen Shin C828 | |
| Brakes Front | Dual hydraulic disc | |
| REAR END | ||
| Suspension Rear | Independent double wishbone, w/5-way preload adjustment and 150mm travel | |
| Tyres Rear | AT25 x 10-12 Chen Shin C828 | |
| Brakes Rear | Fully sealed, oil bath, multi discs | |





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