Yamaha Big Bear 400 4x4 IRS vs BamX BX400-S Assault (2012)
Side-by-side spec comparison, pricing, and a plain-English breakdown of how the Yamaha Big Bear 400 4x4 IRSstacks up against the BamX BX400-S Assault. Numbers pulled from manufacturer spec sheets — click either bike for the full review.
Spec comparison
| Spec | Yamaha Big Bear 400 4x4 IRS | BamX BX400-S Assault |
|---|---|---|
| Model year | 2012 | 2010 |
| Price | $6,599 | $4,299 |
| Engine | 386 cc | 387 cc |
| Horsepower | — | 19 hp |
| Torque | — | 25 Nm |
| Weight | — | 193 kg |
| Seat height | 35 mm | — |
| Fuel capacity | 4.0 L | 2.4 L |
| Fuel type | petrol | petrol |
| Transmission | 5-speed | 6-speed |
| Front brakes | Double disc. Hydraulic | Single disc |
| Rear brakes | Sealed multidisc | Single disc |
| Tires | 25/8-12 / 25/10-12 | 21/7-10 / 20/10-9 |
Yamaha Big Bear 400 4x4 IRS vs BamX BX400-S Assault — which should you buy?
Picking between the Yamaha Big Bear 400 4x4 IRS and the BamX BX400-S Assault usually comes down to the numbers you care about most. On paper, the Yamaha Big Bear 400 4x4 IRS brings its published horsepower, while the BamX BX400-S Assault counters with 19 hp at 193 kg. On price, the BamX BX400-S Assault has the lower MSRP.
Our spec tables above highlight the winning number on each line. For the full rider-focused reviews including real-world fuel economy, service costs and available colors, click into either bike: