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Year
2021
Year
2024
Parent Company
Yamaha
Parent Company
Yamaha
Generic Type (Primary)
Off-Road
Generic Type (Primary)
Off-Road
Make
Yamaha
Make
Yamaha
Display Name
YZ 250
Display Name
YZ 450F
Manufacturer Country
Japan
Manufacturer Country
Japan
Manufacturer Recommend Minimum Age
16
Manufacturer Recommend Minimum Age
16
Introduction Year
-
Introduction Year
2010
Photo Gallery
-
Photo Gallery
Standard
Representative Image
-
Representative Image
No
Price
Standard
Price
Standard
MSRP
$7,499
MSRP
$9,999
Destination Charge
425
Destination Charge
550
Warranty (Months/Condition)
1 / Limited
Warranty (Months/Condition)
1 / Limited
Engine
Standard
Engine
Standard
Engine Type
Single-Cylinder
Engine Type
Single-Cylinder
Cylinders
1
Cylinders
1
Engine Stroke
2-Stroke
Engine Stroke
4-Stroke
Cooling
Liquid
Cooling
Liquid
Valve Configuration
Reed Valve
Valve Configuration
DOHC
Compression Ratio
8.9:1
Compression Ratio
13.0:1
Starter
Kick
Starter
Electric
Fuel Type
Gas / Oil Premix
Fuel Type
Gas
Fuel Requirements
Regular
Fuel Requirements
Regular
Carburetion
Standard
Carburetion
Standard
Carburetion Brand
Keihin
Carburetion Brand
Mikuni
Fuel Injector
No
Fuel Injector
Yes
Carburetor
Yes
Carburetor
No
Number Of Carburetors
1
Number Of Carburetors
-
Carburetion Type
Carburetor
Carburetion Type
Fuel Injected
Bore (mm/in)
66.4 / 2.62
Bore (mm/in)
97 / 3.82
Stroke (in/mm)
2.84 / 72
Stroke (in/mm)
2.39 / 60.8
Displacement (cc/ci)
249 / 15.2
Displacement (cc/ci)
450 / 27.5
Compression Ratio (Secondary)
10.6:1
Compression Ratio (Secondary)
-
Carburetor Size (mm)
38
Carburetor Size (mm)
-
Valves
-
Valves
4
Valves Per Cylinder
-
Valves Per Cylinder
4
Fuel Injector Size (mm)
-
Fuel Injector Size (mm)
44
Transmission
Standard
Transmission
Standard
Transmission Type
Manual
Transmission Type
Manual
Number Of Speeds
5
Number Of Speeds
5
Overdrive
Yes
Overdrive
Yes
Reverse
No
Reverse
No
Primary Drive (Rear Wheel)
Chain
Primary Drive (Rear Wheel)
Chain
Dimensions
Standard
Dimensions
Standard
Weight
Standard
Weight
Standard
Capacities
Standard
Capacities
Standard
Performance
Standard
Performance
Standard
Length (in/mm)
85.7 / 2176.8
Length (in/mm)
85.8 / 2179.3
Width (in/mm)
32.6 / 828
Width (in/mm)
32.7 / 830.6
Height (in/mm)
51.4 / 1305.6
Height (in/mm)
50.2 / 1275.1
Wheelbase (in/mm)
58.3 / 1480.8
Wheelbase (in/mm)
58.3 / 1480.8
Ground Clearance (in/mm)
14.2 / 360.7
Ground Clearance (in/mm)
13.8 / 350.5
Wet Weight (lbs/kg)
227 / 103
Wet Weight (lbs/kg)
240 / 108.9
Fuel Capacity (gal/l)
2.1 / 8
Fuel Capacity (gal/l)
1.6 / 6.1
Engine Displacement to Weight (cc)
1.1
Engine Displacement to Weight (cc)
1.88
Construction
Standard
Construction
Standard
Frame
Aluminum
Frame
Aluminum
Body Material
Plastic
Body Material
Plastic
Foot Pegs
Standard
Foot Pegs
Standard
Foot Peg Location
Driver
Foot Peg Location
Driver
Adjustable
No
Adjustable
No
Hand Grips
Standard
Hand Grips
Standard
Handlebars
Standard
Handlebars
Standard
Handlebar Pads
Standard
Handlebar Pads
Standard
Exterior Guards
Standard
Exterior Guards
Standard
Belt Guard
No
Belt Guard
No
Brush Guard
No
Brush Guard
No
Chain Guard
Yes
Chain Guard
Yes
Chassis Protectors
Yes
Chassis Protectors
Yes
Drive Shaft Guard
No
Drive Shaft Guard
No
Engine Case Guard
No
Engine Case Guard
No
Exhaust Guard
No
Exhaust Guard
No
Fork Guards
Yes
Fork Guards
Yes
Hand Guards
No
Hand Guards
No
Light Guard
No
Light Guard
No
Saddle Bag Guard
No
Saddle Bag Guard
No
Tank Guard
No
Tank Guard
No
Exterior Covers
Standard
Exterior Covers
Standard
Fuel Tank Cover
No
Fuel Tank Cover
No
Front Fender
Standard
Front Fender
Standard
Rear Fender
Standard
Rear Fender
Standard
Stand
Optional
Stand
-
Steering Control
Handlebar
Steering Control
Handlebar
Front Suspension Brand Name
KYB
Front Suspension Brand Name
KYB
Front Suspension Type
Inverted Fork
Front Suspension Type
Inverted Fork
Front Adjustable Fork Pre-Load
Yes
Front Adjustable Fork Pre-Load
Yes
Front Adjustable Rebound Damping
Yes
Front Adjustable Rebound Damping
Yes
Front Central Suspension Strut
No
Front Central Suspension Strut
No
Steering Damper
No
Steering Damper
No
Rear Suspension Brand Name
KYB
Rear Suspension Brand Name
KYB
Rear Suspension Type
Twin Sided Swing Arm
Rear Suspension Type
Twin Sided Swing Arm
Rear Suspension Material
Aluminum
Rear Suspension Material
Aluminum
Rear Adjustable Shock / Spring Pre-Load
Yes
Rear Adjustable Shock / Spring Pre-Load
Yes
Rear Adjustable Rebound Damping
Yes
Rear Adjustable Rebound Damping
Yes
Number Rear Shock Absorbers
1
Number Rear Shock Absorbers
1
Air Adjustable
No
Air Adjustable
No
Front Suspension Size (in/mm)
1.9 / 48
Front Suspension Size (in/mm)
-
Front Travel (in/mm)
11.8 / 299.7
Front Travel (in/mm)
12.2 / 309.9
Rear Travel (in/mm)
12.4 / 315
Rear Travel (in/mm)
12.4 / 315
Wheels
Standard
Wheels
Standard
Wheels Composition
Aluminum
Wheels Composition
Aluminum
Chromed
Yes
Chromed
Yes
Tube / Tubeless
Tubed
Tube / Tubeless
Tubed
Tires
Standard
Tires
Standard
Tire Brand
Dunlop®
Tire Brand
Dunlop®
Front Tire Width
80
Front Tire Width
80
Front Tire Aspect Ratio
100
Front Tire Aspect Ratio
100
Front Wheel Diameter
21
Front Wheel Diameter
21
Rear Tire Width
110
Rear Tire Width
120
Rear Tire Aspect Ratio
90
Rear Tire Aspect Ratio
80
Rear Wheel Diameter
19
Rear Wheel Diameter
19
Front Wheel Width (in)
1.6
Front Wheel Width (in)
-
Rear Wheel Width (in)
2.15
Rear Wheel Width (in)
-
Front Tire (Full Spec)
Dunlop® MX52 80/100 R21
Front Tire (Full Spec)
Dunlop® Geomax MX33F 80/100 R21
Rear Tire (Full Spec)
Dunlop® MX52 110/90 R19
Rear Tire (Full Spec)
Dunlop® Geomax MX33 120/80 R19
Brakes
Standard
Brakes
Standard
Front Brake Type
Hydraulic Disc
Front Brake Type
Hydraulic Disc
Rear Brake Type
Hydraulic Disc
Rear Brake Type
Hydraulic Disc
Front Brake Diameter (in/mm)
10.6 / 270
Front Brake Diameter (in/mm)
10.6 / 270
Rear Brake Diameter (in/mm)
9.7 / 245
Rear Brake Diameter (in/mm)
9.4 / 240
Seat Type
One-Piece
Seat Type
One-Piece
Seat Location
Driver
Seat Location
Driver
Seat Material
Vinyl
Seat Material
Vinyl
Adjustable
No
Adjustable
No
Folding
No
Folding
No
Seat Specifications
Standard
Seat Specifications
Standard
Number Of Seats
1
Number Of Seats
1
Seat Height (in/mm)
39.1 / 993.1
Seat Height (in/mm)
38 / 965.2
Lap Timer
Optional
Lap Timer
-
Adjustable Handlebars
Standard
Adjustable Handlebars
Standard
Adjustable Levers
Standard
Adjustable Levers
Standard
Paint
Standard
Paint
Standard
Metallic
No
Metallic
No
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