2017 YAMAHA YZ250F: WHAT’S NEW?
Cylinder Head and Intake System: The compact four-valve cylinder head features revised intake geometry for additional downdraft effect, matched to shorter intake funnel in the airbox, for improved top-end power. Inside the head, more aggressive camshaft profiles and valve springs boost output further, while larger valve seats ensure excellent sealing and reliability.
Stronger Connecting Rod and Crankcase: The entire die-cast crankcase features a new heat treating process to increase strength. Inside, a new nickel-chromoly steel connecting rod offers additional durability to handle the increased power output.
Updated Transmission: New gear dogs, revised gear tooth designs and a host of smaller changes create a smoother overall transmission with improved shifting, as well as a stronger overall powertrain for improved durability.
Updated Frame and Suspension: Revised engine mounts and a reshaped swingarm pivot section of the aluminum frame improve lateral rigidity, while 5mm lower footpegs help lower the rider’s center of gravity for improved machine balance and control, revised suspension settings front and rear to match the chassis updates.
Airbox: Redesigned air cleaner cover helps prevent contact with the quick- release quarter-turn Dzus® air box fasteners and provides tool-less access to the air filter, positioned at the front of the bike to avoid roost from the rear wheel.
2017 YAMAHA YZ450F: WHAT’S NEW?
Airbox: Redesigned air cleaner over helps prevent contact with the quick-release quarter-turn Dzus air box fasteners, providing tool-less access to the air filter that’s positioned at the front of the bike avoiding roost from the rear wheel.
Rear Brake Rotor: Updated rear brake rotor material that has better heat resistance providing better durability and braking feel.
Dunlop MX3S tires: For 2017, the YZ450F features soft-to-intermediate terrain tires, the Dunlop MX3S.
Revised Graphics: Stylish new graphics treatment brings the YZ450F even closer to that pure factory racer look, that are molded directly into the plastic, for extended durability, resisting both peeling and damage.
2017 YAMAHA YZ85 TWO-STROKE: WHAT’S NEW?
Updates: Nothing changes for 2017
2017 YAMAHA YZ125 TWO-STROKE: WHAT’S NEW?
2017 YAMAHA YZ250TWO-STROKE: WHAT’S NEW?
2017 YAMAHA YZ250X CROSS-COUNTRY TWO-STROKE: WHAT’S NEW?
2017 YAMAHA YZ250FX CROSS-COUNTRY: WHAT’S NEW?
Piston: A new lightweight forged two-ring piston uses a flat piston crown surface with additional strengthening ribs and a shorter, more durable piston pin with diamond like carbon (DLC) coating. The new piston is lighter, significantly stronger and together with revised EFI mapping, improves combustion performance for a faster, more thorough burn, resulting in excellent pulling power.
Crank and Connecting Rod: Optimized crankshaft and counterbalancer designs feature a revised balance ratio, predictive power delivery and reduced vibration. A new nickel-chromoly steel connecting rod offers additional durability to handle the increased power output.
Stronger Crankcase: The crankcase features a new heat treating process to increase strength, for protection, the frame welcomes the addition of a rugged plastic skid plate.
270mm Front Brake: 270mm front disc (up from 250mm) brake coupled with new pad material offers outstanding braking power and performance.
Revised Suspension Systems: Both front and rear dampers feature optimized settings for 2017 to further boost overall suspension performance, while the front fork utilizes a stronger oil seal system for enhanced durability in the toughest conditions.
Updated Indicator: Thanks to a new WR-style fuel level sensor in the tank, the 2017 YZ250FX includes a convenient fuel level and engine warning indicator on the handlebar.
2017 YAMAHA YZ450FX CROSS-COUNTRY: WHAT’S NEW?
Airbox: Redesigned air cleaner cover provides tool-less access to the air filter, positioned at the front of the bike to avoid roost from the rear wheel.
Updated Indicators: Thanks to a new WR-style fuel level sensor in the tank, the 2017 YZ450FX includes convenient fuel level and engine warning indicators on the handlebar.