2003 Yamaha YZ450F - Motorcycle.com
Lake Whitney, Texas, August 30, 2002 -- The Fed-Ex man arrived at Hatch Studios with plane tickets and a packed itinerary straight from Yamaha -- my new MO mission was going to Lake Whitney, Texas for a chance to ride the all-new 2003 YZ450F. I was apprehensive at first -- I'm a reborn dirt rider on my WR 400 with very little MX track time. But, I figured a chance like this might only come around once, so I would give it my best shot and apologize later. The tone of this first-class affair was set early in Texas when I was greeted by a Cadillac Escalade stretch limo. After picking up the wild boys from "Motoworld" we were on our way to the luxurious WB Ranch.
Morning broke with
Once in the saddle the work area was impressive with a new flatter tank and seat junction and aggressive riding position. I would have to learn to sit forward now that I could, compared to my big old WR tank. Ergos were quite roomy for my large stature and after a rear brake adjustment things were good to go. I headed out on my reconnaissance lap gently wicking up the pace with each turn. The 450 felt very forgiving in any circumstance and gave me the utmost confidence tackling any obstacle I encountered while lapping the loamy track. I found the power from the extra 23ccs added this year to be very linear with more than enough on tap anywhere in the rev range to blast me over a set of woops or straight up the face of a jump with little effort. The trans is now a four speed down from five and made perfect sense since I would only climb as high as 3rd during my time at the track.
The Yamaha staff was great acting in a very accommodating and understanding manner. I had a chance to work with photographer Frank Hoppen who has to be the hardest working man in show business. He did his best to capture me digitally not looking too out of my element. While taking a break from the oppressive Texas heat I climbed to the top of a tower to watch Doug Dubach hammer around the track showing the true capabilities of this bike. The thundering exhaust note made it clear Doug rarely gets off the pipe while ripping his way around the track; it was an impressive sight to behold to say the least. In the right hands this bike is capable of amazing things.
I feel the YZ 450 has finally reached maturity with the 2003 model and Yamaha has created a confidence-inspiring bike that enables the rider to reach the limits of their ability without any drama or stress. There are no longer any compromises when going with a four-stroke. This is the 450 MX bike for 2003 but I may need to mount the rival Honda to confirm my opinion.Specifications
2003 Yamaha YZ450F Specs
Engine:
Type: 449cc, DOHC, 5-valve, liquid-cooled
four-stroke w/ titanium valves
Bore x stroke: 95x63.4mm/3.74x2.5in
Compression ratio: 12.5:1
Carburetion: 39mm Keihin FCR Flat-side w/TPS
Transmission: Constant mesh 4-speed,
multi-disc wet clutch
Starting: Kick
Chassis/Suspension:
Frame: Semi double cradle
Front suspension: Telescopic fork, 11.81"/300mm travel;
coil spring/oil damper
Rear suspension: Swingarm link suspension, 12.4" travel;
coil spring/gas-oil damper;
separate hi/lo-spd compression adjustment
Rake: 27.2°
Trail: 4.65in/118mm
Front brake: 250mm floating disc
Rear brake: 245mm single disc
Front tire: 80/100-21 Dunlop 739
Rear tire: 110/90-19 Dunlop 739
Dimensions:
Overall dimensions (LxWxH)- 85.5x32.6x51.3"/2172x828x1303mm
Seat height: 39.2"/996mm
Wheelbase: 58.5"/1486mm
Ground clearance: 14.6"/371mm
Fuel capacity: 1.8gallons/8.2L
Dry weight: 222lbs/101kg
Colors: Team Yamaha Blue/White
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