If you've been drooling over Yamaha's new track-friendly YFZ450R, but you wish it was narrower and had features geared for riding or racing on tight trails, Yamaha has granted your wish with the new YFZ450X.?>
What's different about the X model? Well, it's narrower than the R model by 2.7 inches; it has a newly designed front suspension; new steering geometry; a lighter rear axle; and lighter, but structurally more rigid wheels.
To delve into more detail, the X suspension is similar to the R in that up front, there's an independent double wishbone with fully adjustable KYB piggyback-reservoir coilover shocks and in the rear there's a cast aluminum swingarm with fully adjustable KYB piggyback-reservoir coilover shock. The X, however, has shorter A-arms and shorter shocks up front. Yamaha says all of these things allow the X to soak up bumps while also allowing the rider great handling through tight, technical terrain.?>
Powering the X is the same potent engine that's found in the R model. It's a five-titanium -valve, DOHC, liquid-cooled, single-cylinder 449cc engine that uses the cylinder and head from the championship-winning YZ450F motorcycle. The camshafts are designed just for ATVs, they hammer out superior low- to mid-range torque, and they push through to a high-revving top end. The engine is also equipped with electronic fuel injection featuring a 42mm Mikuni throttle body, 12-hole Denso injector system and a Mitsubishi 32-bit ECU. This EFI system has been tweaked for the X model and features a setting specifically designed for those situations unique to technical woods riding.
Like the R model, the X has the Yamaha-exclusive lightweight no-weld cast aluminum frame; a five-speed transmission; chain drive; dual vented disc front brakes with two-piston calipers; wave-style ventilated hydraulic rear brake with two-piston caliper; and Pro Taper handlebars with four-position adjustability.?>
Also like its brother, the X model has an instrument panel located on the fender in front of the rider and it has indicators signaling low fuel, coolant temperature, check engine, and neutral gear in a straightforward LED display. There's also a thin yet roomy seat with more padding in the back for a more comfortable ride and there's large, wide footpegs with kick-ups that provide maximum traction and added comfort when moving around on the machine.
So there you have it. The new YFZ450X is Yamaha's response to those wishing for a narrower, trail-friendly version of the incredible YFZ450R.
Vehicle model: 2010 Yamaha YFZ450X
Base price: $8499
Colors: Team Yamaha Blue/White, White/Red
Type: Single-cylinder DOHC four-stroke, liquid-cooled w/fan
Displacement (cc): 449
Bore and stroke (mm): 95 x 63.4
Transmission: 5-speed manual clutch
Final drive: Chain
Front: Independent double-wishbone, Kashima-coated piggyback shocks, high/low speed compression, rebound and threaded preload adjustments, 9.4 inches of travel
Rear: Cast aluminum swing arm, piggyback high/low speed compression, rebound and threaded preload adjustment, 11.0 inches of travel
Front: Dual ventilated hydraulic discs, twin-piston calipers
Rear: Wave-style ventilated hydraulic disc, twin-piston caliper
Front: AT21x7-10 Radial Rear: AT20x10-9 Radial
Weight (lb): 400
Length (in): 70.7
Width (in): 46.1
Height (in): 41.9
Seat height (in): 31.9
Ground Clearance (in): 4.5
Fuel capacity (gal): 2.6
Wheelbase (in): 50.0