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Yamaha’s 2005 YZ’s

Published May 24th, 2004





Courtesy Yamaha Motor Corp., USA (photos below)





450 MSRP $6,399

  • 449cc, liquid-cooled, 5-valve, DOHC, 4-stroke w/titanium valves
  • Bore x Stroke 95 x 63.4mm
  • Compression Ratio 12.3:1
  • Carburetion 39mm Keihin FCR flat-slide w/throttle position sensor
  • Ignition Digital CDI
  • Transmission 4-speed w/multi-plate wet clutch
  • Final Drive #520 Chain
  • Suspension/Front 48mm Kayaba inverted telescopic fork w/adjustable compression and rebound damping; 11.8″ travel
  • Suspension/Rear Kayaba single shock w/adjustable preload, compression and rebound damping & separate hi/lo-speed compression adjuster; 12.4″ travel
  • Brakes/Front 250mm Floating Disc
  • Brakes/Rear 245mm Disc
  • Tires/Front 80/100-21-51M Dunlop
  • Tires/Rear 110/90-19-62M Dunlop
  • Length 85.5″
  • Width 32.6″
  • Height 51.3″
  • Seat Height 39.2″
  • Wheelbase 58.5″
  • Ground Clearance 14.6″
  • Dry Weight 220 Lbs.
  • Fuel Capacity 1.8 Gallons
  • Color Team Yamaha Blue/White
  • Warranty 30 Day (Limited Factory Warranty)


250 two-stroke MSRP $6,099

  • 249cc, liquid-cooled, reed valve-inducted, 2-stroke
  • Bore x Stroke 66.4 x 72mm
  • Compression Ratio 9.1 – 10.6:1
  • Carburetion 38mm Keihin PWK w/power jet & throttle position sensor
  • Ignition Digital CDI
  • Transmission 5-speed w/multi-plate wet clutch
  • Final Drive #520 Chain
  • Suspension/Front – 48mm Kayaba inverted telescopic fork w/adjustable compression and rebound damping; 11.8″ travel
  • Suspension/Rear – Kayaba single shock w/adjustable preload, compression and rebound damping separate hi/lo-speed compression adjusters;12.4″ travel
  • Brakes/Front – 250mm Floating Disc
  • Brakes/Rear – 245mm Disc
  • Tires/Front – 80/100-21-51M Dunlop
  • Tires/Rear – 110/90-19-62M Dunlop
  • Length 85.9″
  • Width 32.6″
  • Height 51.5″
  • Seat Height 39.0″
  • Wheelbase 58.3″
  • Ground Clearance 15.6″
  • Dry Weight 211 Lbs.
  • Fuel Capacity 2.1 Gallons
  • Color Team Yamaha Blue/White
  • Warranty 30 Day (Limited Factory Warranty)


250 four-stroke MSRP $5,699

  • 249cc, liquid-cooled, 5-valve, DOHC, 4-stroke w/titanium valves
  • Bore x Stroke 77 x 53.6mm
  • Compression Ratio 12.5:1
  • Carburetion 37mm Keihin FCR flat-slide w/throttle position sensor
  • Ignition Digital CDI
  • Transmission 5-speed w/multi-plate wet clutch
  • Final Drive #520 Chain
  • Suspension/Front 48mm Kayaba inverted telescopic fork w/adjustable compression and rebound damping; 11.8″ travel
  • Suspension/Rear Kayaba single shock w/adjustable preload, compression and rebound damping & separate hi/lo-speed compression adjuster; 12.4″ travel
  • Brakes/Front 250mm Floating Disc
  • Brakes/Rear 245mm Disc
  • Tires/Front 80/100-21-51M Dunlop
  • Tires/Rear 100/90-19-57M Dunlop
  • Length 85.2″
  • Width 32.6″
  • Height 51.3″
  • Seat Height 39.2″
  • Wheelbase 58.0″
  • Ground Clearance 15.0″
  • Dry Weight 206 Lbs.
  • Fuel Capacity 1.8 Gallons
  • Color Team Yamaha Blue/White
  • Warranty 30 Day (Limited Factory Warranty)


125 MSRP $5,299

  • 124cc, liquid-cooled, reed valve-inducted, 2-stroke
  • Bore x Stroke 54 x 54.5mm
  • Compression Ratio 8.6:1 – 11.0:1
  • Carburetion 38mm Mikuni TMX
  • Ignition Digital CDI
  • Transmission 6-speed w/multi-plate wet clutch
  • Final Drive #520 Chain
  • Suspension/Front 48mm Kayaba inverted telescopic fork w/adjustable compression and rebound damping; 11.8″ travel
  • Suspension/Rear Kayaba single shock w/adjustable preload, compression and rebound damping & separate hi/lo-speed compression adjusters; 12.4″ travel
  • Brakes/Front 250mm Floating Disc
  • Brakes/Rear 245mm Disc
  • Tires/Front 80/100-21-51M Dunlop
  • Tires/Rear 100/90-19-57M Dunlop
  • Length 84.0″
  • Width 32.6″
  • Height 51.9″
  • Seat Height 39.1″
  • Wheelbase 56.6″
  • Ground Clearance 15.8″
  • Dry Weight 189 Lbs.
  • Fuel Capacity 2.1 Gallons
  • Color Team Yamaha Blue/White
  • Warranty 30 Day (Limited Factory Warranty)


85 MSRP $3,099

  • 85cc, liquid-cooled, reed valve-inducted, 2-stroke
  • Bore x Stroke 47.5 x 47.8mm
  • Compression Ratio 8.2:1
  • Carburetion 28mm flat-slide Keihin PWK
  • Ignition Digital CDI
  • Transmission 6-speed w/multi-plate wet clutch
  • Final Drive #428 Chain
  • Suspension/Front 36mm Kayaba inverted telescopic fork w/adjustable compression and rebound damping; 10.8″ travel
  • Suspension/Rear Kayaba single shock w/adjustable preload, compression and rebound damping; 11.3″ travel
  • Brakes/Front 220mm Disc
  • Brakes/Rear 190mm Disc
  • Tires/Front 70/100-17-40M Dunlop
  • Tires/Rear 90/100-14 -49MDunlop
  • Length 71.7″
  • Width 29.8″
  • Height 45.7″
  • Seat Height 34″
  • Wheelbase 49.5″
  • Ground Clearance 13.8″
  • Dry Weight 146 Lbs.
  • Fuel Capacity 1.3 Gallons
  • Color Team Yamaha Blue/White
  • Warranty 30 Day (Limited Factory Warranty)

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Yamaha's 2005 YZ's - Photo 1 of 9

YZ 250 – AMA Supercross Champion

Yamaha's 2005 YZ's - Photo 2 of 9

YZ 85

Yamaha's 2005 YZ's - Photo 3 of 9

YZ 125

Yamaha's 2005 YZ's - Photo 4 of 9

YZ 125

Yamaha's 2005 YZ's - Photo 5 of 9

MX, YZ 250F style

Yamaha's 2005 YZ's - Photo 6 of 9

The 250 F

Yamaha's 2005 YZ's - Photo 7 of 9

Close up YZ 450 motor

Yamaha's 2005 YZ's - Photo 8 of 9

The YZ 450

Yamaha's 2005 YZ's - Photo 9 of 9

Supercross Champion



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