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Year
2021
Year
2024
Parent Company
Yamaha
Parent Company
Yamaha
Generic Type (Primary)
Standard
Generic Type (Primary)
Off-Road
Make
Yamaha
Make
Yamaha
Display Name
Bolt R-Spec
Display Name
YZ 450FX
Manufacturer Country
Japan
Manufacturer Country
Japan
Introduction Year
2014
Introduction Year
2016
Manufacturer Recommend Minimum Age
16
Manufacturer Recommend Minimum Age
16
Price
Standard
Price
Standard
MSRP
$8,499
MSRP
$10,199
Destination Charge
430
Destination Charge
550
Warranty (Months/Condition)
12 / Limited
Warranty (Months/Condition)
1 / Limited
Engine
Standard
Engine
Standard
Engine Type
V Twin
Engine Type
Single-Cylinder
Cylinders
2
Cylinders
1
Engine Stroke
4-Stroke
Engine Stroke
4-Stroke
Cooling
Air
Cooling
Liquid
Valves
8
Valves
4
Valves Per Cylinder
4
Valves Per Cylinder
4
Valve Configuration
SOHC
Valve Configuration
DOHC
Compression Ratio
9.0:1
Compression Ratio
13.0:1
Starter
Electric
Starter
Electric
Fuel Type
Gas
Fuel Type
Gas
Fuel Requirements
Regular
Fuel Requirements
Regular
Carburetion
Standard
Carburetion
Standard
Fuel Injector
Yes
Fuel Injector
Yes
Carburetor
No
Carburetor
No
Carburetion Type
Fuel Injected
Carburetion Type
Fuel Injected
Bore (mm/in)
85 / 3.35
Bore (mm/in)
97 / 3.82
Stroke (in/mm)
3.27 / 83
Stroke (in/mm)
2.4 / 60.9
Displacement (cc/ci)
942 / 58
Displacement (cc/ci)
450 / 27.5
US Miles Per Gallon (Combined)
51
US Miles Per Gallon (Combined)
-
Carburetion Brand
-
Carburetion Brand
Mikuni
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
Reverse
No
Reverse
No
Primary Drive (Rear Wheel)
Belt
Primary Drive (Rear Wheel)
Chain
Overdrive
-
Overdrive
Yes
Dimensions
Standard
Dimensions
Standard
Weight
Standard
Weight
Standard
Capacities
Standard
Capacities
Standard
Performance
Standard
Performance
Standard
Length (in/mm)
90.2 / 2291.1
Length (in/mm)
85.4 / 2169.2
Width (in/mm)
37.2 / 944.9
Width (in/mm)
32.5 / 825.5
Height (in/mm)
44.1 / 1120.1
Height (in/mm)
49.8 / 1264.9
Wheelbase (in/mm)
61.8 / 1569.7
Wheelbase (in/mm)
57.9 / 1470.7
Ground Clearance (in/mm)
5.1 / 129.5
Ground Clearance (in/mm)
13 / 330.2
Wet Weight (lbs/kg)
542 / 245.9
Wet Weight (lbs/kg)
251 / 113.9
Fuel Capacity (gal/l)
3.4 / 12.9
Fuel Capacity (gal/l)
2.1 / 7.9
Engine Displacement to Weight (cc)
1.74
Engine Displacement to Weight (cc)
1.79
Construction
Standard
Construction
Standard
Frame
Steel
Frame
Aluminum
Foot Pegs
Standard
Foot Pegs
Standard
Foot Peg Location
Driver
Foot Peg Location
Driver
Hand Grips
Standard
Hand Grips
Standard
Handlebars
Standard
Handlebars
Standard
Exterior Guards
Standard
Exterior Guards
Standard
Belt Guard
Yes
Belt Guard
No
Brush Guard
No
Brush Guard
No
Chain Guard
No
Chain Guard
Yes
Drive Shaft Guard
No
Drive Shaft Guard
No
Exhaust Guard
Yes
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
Radiator Cover
No
Radiator Cover
-
Front Fender
Standard
Front Fender
Standard
Rear Fender
Standard
Rear Fender
Standard
Stand
Standard
Stand
Standard
Stand Type
Kick
Stand Type
Kick
Body Material
-
Body Material
Plastic
Adjustable
-
Adjustable
No
Handlebar Pads
-
Handlebar Pads
Standard
Chassis Protectors
-
Chassis Protectors
Yes
Engine Case Guard
-
Engine Case Guard
No
Fuel Tank Cover
-
Fuel Tank Cover
No
Skid Plate
-
Skid Plate
Standard
Steering Control
Handlebar
Steering Control
Handlebar
Front Suspension Type
Telescopic Fork
Front Suspension Type
Inverted Fork
Front Adjustable Fork Pre-Load
No
Front Adjustable Fork Pre-Load
Yes
Front Adjustable Rebound Damping
No
Front Adjustable Rebound Damping
Yes
Front Central Suspension Strut
No
Front Central Suspension Strut
No
Steering Damper
No
Steering Damper
No
Rear Suspension Type
Twin Sided Swing Arm
Rear Suspension Type
Twin Sided Swing Arm
Rear Adjustable Shock / Spring Pre-Load
No
Rear Adjustable Shock / Spring Pre-Load
Yes
Rear Adjustable Rebound Damping
No
Rear Adjustable Rebound Damping
Yes
Number Rear Shock Absorbers
2
Number Rear Shock Absorbers
1
Air Adjustable
No
Air Adjustable
No
Front Suspension Size (in/mm)
1.6 / 41
Front Suspension Size (in/mm)
-
Front Travel (in/mm)
4.7 / 119.4
Front Travel (in/mm)
11.8 / 299.7
Rear Travel (in/mm)
2.8 / 71.1
Rear Travel (in/mm)
12 / 304.8
Front Suspension Brand Name
-
Front Suspension Brand Name
KYB
Rear Suspension Brand Name
-
Rear Suspension Brand Name
KYB
Rear Suspension Material
-
Rear Suspension Material
Aluminum
Wheels
Standard
Wheels
Standard
Wheels Composition
Aluminum
Wheels Composition
Aluminum
Tube / Tubeless
Tubeless
Tube / Tubeless
Tubed
Tires
Standard
Tires
Standard
Tire Brand
Bridgestone®
Tire Brand
Dunlop®
Front Tire Width
100
Front Tire Width
80
Front Tire Aspect Ratio
90
Front Tire Aspect Ratio
100
Front Tire Speed Rating
H
Front Tire Speed Rating
-
Front Wheel Diameter
19
Front Wheel Diameter
21
Rear Tire Width
150
Rear Tire Width
120
Rear Tire Aspect Ratio
80
Rear Tire Aspect Ratio
90
Rear Tire Speed Rating
H
Rear Tire Speed Rating
-
Rear Wheel Diameter
16
Rear Wheel Diameter
18
Front Tire (Full Spec)
Bridgestone® 100/90 R19 57H
Front Tire (Full Spec)
Dunlop® Geomax MX33F 80/100 R21
Rear Tire (Full Spec)
Bridgestone® 150/80 R16 71H
Rear Tire (Full Spec)
Dunlop® Geomax MX33 120/90 R18
Chromed
-
Chromed
Yes
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)
11.7 / 298
Front Brake Diameter (in/mm)
10.6 / 270
Rear Brake Diameter (in/mm)
11.7 / 298
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
Detachable Passenger Seat
Optional
Detachable Passenger Seat
-
Seat Height (in/mm)
27.2 / 690.9
Seat Height (in/mm)
37.6 / 955
Digital Instrumentation
Standard
Digital Instrumentation
-
Speedometer
Standard
Speedometer
-
Trip Odometer
Standard
Trip Odometer
-
Fuel Level Warning
Standard
Fuel Level Warning
-
Side Storage Mount
Optional
Side Storage Mount
-
Fork Bag
Optional
Fork Bag
-
Rear Rack
Optional
Rear Rack
-
Saddle Bag (s)
Optional
Saddle Bag (s)
-
Type
Halogen
Type
-
Headlight (s)
Standard
Headlight (s)
-
Halogen Headlight (s)
Standard
Halogen Headlight (s)
-
Rearview Mirrors
Standard
Rearview Mirrors
-
Windshield
Optional
Windshield
-
Heated Hand Grips
Optional
Heated Hand Grips
-
Adjustable Handlebars
-
Adjustable Handlebars
Standard
Adjustable Levers
-
Adjustable Levers
Standard
Saddle Bag Mounts
Optional
Saddle Bag Mounts
-
Windshield Mounts
Optional
Windshield Mounts
-
Paint
Standard
Paint
Standard
Metallic
No
Metallic
No
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