| Component | Specification |
|---|---|
| Model Years | 2016-2018 |
| Engine Oil | 10W-40 (JASO MA) |
| Oil Capacity | 2.5 Liters |
| Spark Plug | NGK LMAR8G |
| Battery | YTX20L-BS |
| Front Tires | AT26 x 8-12 |
| Rear Tires | AT26 x 10-12 |
| Tire Pressure | 0.35 bar (5.0 psi) |
The 2016 debut of the AM09W generation marked a pivotal moment in Yamaha’s utility ATV history. While the industry was obsessed with increasing cylinder counts, Yamaha’s engineers focused on optimizing the single-cylinder platform. This specific iteration introduced the 708cc DOHC engine, a departure from the previous 686cc SOHC design, specifically engineered to provide a broader torque curve and more aggressive mid-range power for technical trail navigation.
Technical Engineering Overview
The AM09W chassis was refined to accommodate the larger 26-inch Maxxis tires as standard equipment, necessitating a recalibration of the Electric Power Steering (EPS) mapping. This generation is characterized by its high-mounted air intake and stainless steel exhaust system, designed for extreme durability in amphibious conditions. The Ultramatic® transmission remains the gold standard in the industry, utilizing a sprag clutch to provide natural all-wheel engine braking.
Maintenance Protocols
For the professional technician or the dedicated owner, adhering to the AM09W’s specific fluid requirements is critical for longevity. The 708cc powerplant is sensitive to oil shear; therefore, using a high-quality 10W-40 oil that strictly meets JASO MA specifications is non-negotiable to protect the integrated wet clutch system.
Ignition and Electrical
The electrical system relies on the high-output YTX20L-BS battery to support the EPS motor and optional winch accessories. For combustion efficiency, the NGK LMAR8G spark plug is specified. This long-reach plug is essential for the DOHC head design to ensure optimal flame propagation within the combustion chamber.
Chassis and Handling
The Grizzly 700 EPS utilizes a staggered tire setup (AT26 x 8-12 front and AT26 x 10-12 rear). Maintaining the precise 0.35 bar (5.0 psi) pressure is vital for the independent double wishbone suspension to cycle correctly. Deviation from these pressures can lead to unpredictable feedback through the EPS system and premature wear of the CV joints.
Final Verdict
The Yamaha YFM 700 F Grizzly (AM09W) represents the pinnacle of single-cylinder utility engineering. It offers a balance of mechanical simplicity and sophisticated electronics that few modern ATVs can match. Proper maintenance using the specified components listed above ensures this machine remains a reliable asset for both recreational and professional use.