Yamaha Motocross Motorcycles

Introduction YZ65

Designed for the discriminating mini moto racer that wants to win and propel themselves into the victory zone.

Specifications

Engine
Type 65cc liquid-cooled 2-stroke; reed-valve inducted
Bore x Stroke 43.5mm x 43.6mm
Compression Ratio 8.1~9.1:1
Fuel Delivery Keihin® PWK28 carburetor
Transmission 6-speed; multiplate wet clutch
Final Drive Chain
Chassis
Suspension / Front 36mm KYB® coil spring, adjustable compression
and rebound damping; 8.5-in travel
Suspension / Rear Single shock, adjustable compression and
rebound damping; 10.6-in travel
Brakes / Front 198mm hydraulic disc
Brakes / Rear 190mm hydraulic disc
Tires / Front 60/100-14
Tires / Rear 80/100-12
Dimensions
L x W x H 161.29 cm x 76.2 cm x 100.33 cm
Seat Height 74.93 cm
Wheelbase 114.3 cm
Fuel Capacity 3.40 Litres
Wet Weight 60.78 kg

Introduction YZ85

The YZ85/LW has a reliable 2-stroke liquid-cooled 85cc engine which produces smooth and useable power –with an easy handling chassis and modern image.

Specifications

Engine
Engine type Single cylinder, liquid-cooled, 2-stroke, reed valve
Displacement 84.7cc
Bore x stroke 47.5 mm x 47.8 mm
Compression ratio 8.1 : 1
Lubrication system Premix
Clutch Type Wet, multiple-disc coil spring
Carburettor Keihin PWK28/1
Ignition system CDI
Starter system Kick
Transmission system Constant Mesh, 6-speed
Final transmission Chain
Chassis
Frame Semi double cradle
Front suspension system Upside-down telescopic fork
Front travel 275 mm
Caster Angle 27º
Trail 106 mm
Rear suspension system Swingarm, (link suspension)
Rear Travel 282 / 287* mm
Front brake Single Disc, Ø 220 mm
Rear brake Single Disc, Ø 190 mm
Front tyre 70/100-17 40M / 70/100-19 42M
Rear tyre 90/100-14 49M / 90/100-16 52M
Dimensions
Overall length 1,899 / 1,903* mm
Overall width 758 mm
Overall height 1,156 mm
Seat height 873 / 904* mm
Wheel base 1,285 / 1,286* mm
Minimum ground clearance 360 / 393* mm
Wet weight (including full oil and fuel tank) 71 / 73* kg
Fuel tank capacity 5.0 litres
Oil tank capacity 0.5 litres

Introduction YZ125

The YZ125 has explosive engine power and ultra responsive aluminium chassis, with a lightweight 125cc 2-stroke that is a proven winner at the highest level.

Specifications

Engine
Engine type liquid-cooled, 2-stroke, Forward-inclined single cylinder, reed valve with YPVS
Displacement 125cc
Bore x stroke 54.0 mm x 54.5 mm
Compression ratio 8.6 ~ 10.7 : 1
Lubrication system Premix
Clutch Type Wet, multiple-disc coil spring
Carburettor Mikuni TMX38
Ignition system CDI
Starter system Kick
Transmission system Constant Mesh, 6-speed
Final transmission Chain
Chassis
Frame Semi double cradle
Front suspension system Upside-down telescopic fork
Front travel 300 mm
Caster Angle 26º
Trail 109 mm
Rear suspension system Swingarm, (link suspension)
Rear Travel 315 mm
Front brake Hydraulic single disc, Ø 250 mm
Rear brake Hydraulic single disc, Ø 245 mm
Front tyre 80/100-21 51M
Rear tyre 100/90-19 57M
Dimensions
Overall length 2,137 mm
Overall width 825 mm
Overall height 1,295 mm
Seat height 975 mm
Wheel base 1,445 mm
Minimum ground clearance 363 mm
Wet weight (including full oil and fuel tank) 94 kg
Fuel tank capacity 8.0 L
Oil tank capacity 0.7 L

Introduction YZ250

With explosive engine performance and a lightweight aluminium chassis, the yz250 attracts a loyal following of riders who grew up with 2-strokes.

Specifications

Engine
Engine type liquid-cooled, 2-stroke, Forward-inclined single cylinder, reed valve with YPVS
Displacement 249cc
Bore x stroke 66.4 mm x 72.0 mm
Compression ratio 8.9 ~ 10.6 : 1
Lubrication system Premix
Clutch Type Wet, multiple-disc coil spring
Carburettor Keihin PWK38S/1
Ignition system CDI
Starter system Kick
Transmission system Constant Mesh, 5-speed
Final transmission Chain
Chassis
Frame Alu semi-double cradle
Front suspension system Upside-down telescopic fork
Front travel 300 mm
Caster Angle 26º
Trail 109 mm
Rear suspension system Swingarm, (link suspension)
Rear Travel 315 mm
Front brake Hydraulic single disc, Ø 250 mm
Rear brake Hydraulic single disc, Ø 245 mm
Front tyre 80/100-21 51M
Rear tyre 110/90-19 62M
Dimensions
Overall length 2,147 mm
Overall width 827 mm
Overall height 1,299 mm
Seat height 976 mm
Wheel base 1,446 mm
Minimum ground clearance 367 mm
Wet weight (including full oil and fuel tank) 103 kg
Fuel tank capacity 8.0
Oil tank capacity 0.8

Introduction YZ250F

Featuring a newly designed high-performance electric start engine, this state of the art 250cc 4-stroke opens up a new era in wireless connectivity and trackside tunability.

Specifications

Engine
Engine Type Liquid cooled, 4-stroke, DOHC, 4-valve
Displacement (cc) 250.0
Bore x Stroke (mm) 77.0 x 53.6
Compression Ratio 13.8 : 1
Lubrication System Wet sump
Fuel Management Fuel Injection
Ignition TCI
Starter System Electric
Fuel Tank Capacity (L) 6.5
Final Transmission Chain
Transmission Constant mesh 5-speed
Chassis
Frame Type Bilateral beam
Suspension Front Telescopic forks, 310mm travel
Suspension Rear Swingarm (link suspension), 315mm travel
Brakes Front Hydraulic single disc, 270mm
Brakes Rear Hydraulic single disc, 245mm
Tyres Front 80/100-21 51M
Tyres Rear 100/90-19 57M
Dimensions
Length (mm) 2175
Width (mm) 825
Height (mm) 1285
Seat Height (mm) 970
Wheelbase (mm) 1475
Ground Clearance (mm) 335
Wet Weight (kg) 106

Introduction YZ450F

With its innovative reverse cylinder head as well as an ultra-compact chassis and sophisticated suspension, the YZ450F is ready to push your racing career to the next level.

Specifications

Engine
Engine Type 449cc liquid-cooled DOHC 4-stroke; 4 titanium valves
Bore x Stroke 97.0mm × 60.9mm
Compression Ratio 13.0:1
Fuel Delivery Mikuni® fuel injection, 44mm
Transmission 5-speed; multiplate wet clutch
Final Drive Chain
Chassis
Suspension / Front KYB® spring-type fork with speed sensitive
damping; fully adjustable, 12.2-in travel
Suspension / Rear KYB® single shock; fully adjustable, 12.5-in travel
Brakes / Front Hydraulic disc, 270mm
Brakes / Rear Hydraulic disc, 240mm
Tires / Front 80/100-21
Tires / Rear 120/80-19
Dimensions
L x W x H 218.44 cm x 82.55 cm x 127.50 cm
Seat Height 96.52 cm
Wheelbase 148.082 cm
Fuel Capacity 6.05 Litres
Wet Weight 111.13 kg