Latest model motocross 450 series

Aprilia SXV 450 – 550

Engine
77° V twin four strokes. Liquid cooled. Single overhead cam with rocker
Operated exhaust valves, chain timing drive. 4 valve heads with titanium valves.
Titanium valve cover screws.
Fuel: Lead-free petrol.
Bore x stroke: 76 x 49.5 mm (80 x 55 mm).
Total displacement: 449 cc (549 cc).
Compression ratio: 12.5:1 (12:1).
Fuel system: Integrated electronic engine management system controlling ignition and fuel injection. “Hard/soft” mappings selectable from the handlebars.
Throttle body: 38 mm (40 mm).
Ignition: Electronic.
Starting: Electric starting.
Alternator: 340 W.
Lubrication: Dry sump with external oil tank. Separate gearbox lubrication.
Gearbox 5 speed. Supermotard gear ratios: 1st 13/30, 2nd 15/27, 3rd 16/23, 4th 20/23 & 5th 21/21
Clutch: Cable operated multi-plate wet clutch.

Primary drive: Spur gears. Transmission ratio: 22/56.
Final drive: Chain. Transmission ratio: 15/46 (16/46).
Frame: Steel perimeter frame with aluminum alloy vertical members.
Front suspension: Ø 48 mm upside down fork with two adjustments.
Rear suspension: Box section aluminum swing arm with cast body.
Hydraulic mono shock with compression and rebound adjustment.
Brakes
Front: Ø 320 mm stainless steel disc with radial caliper.
Rear: Æ 240 mm stainless steel disc with floating caliper.
Wheels Light alloy.
Front: 3.50 x 17”
Rear: 5.50 x 17”
Tires
Front: 120/70 x 17”
Rear: 180/55 x 17”
Dimensions
Overall length: 2,222 mm
Overall width: 800 mm
Ground clearance: 318 mm
Seat height: 918 mm
Wheelbase: 1,495 mmFuel tank Capacity: 7.8 liters


Honda CRF450X
Engine Type: 449cc liquid-cooled single-cylinder four-stroke
Bore and Stroke: 96mm x 62mm
Compression Ratio: 12.0:1
Valve Train: Unicam; four-valve
Intake Valve size 35mm
Exhaust valve size 30mm
Induction: Keihin 40mm flat-slide carburetor with throttle position sensor (TPS)
Ignition: CD with electronic advance and lighting coil
Starting: Electric and kick
Transmission: Wide-ratio five-speed
Final Drive: #520 T-ring-sealed chain; 13T/51T
Suspension
Front: 47mm inverted Showa cartridge fork with 16-position rebound and 16-position compression damping adjustability; 12.4 inches travel
Rear: Pro-Link Showa single shock with adjustable spring preload, 17-position rebound damping adjustability and compression damping adjustment separated into low-speed (13 positions) and high-speed (3.5 turns); 12.4 inches travel
Brakes
Front: Single 240mm disc with twin-piston caliper
Rear: Single 240mm disc
Tires
Front: 80/100-21
Rear: 110/100-18


Kawasaki KLX450R
Engine: Four-stroke, DOHC, four-valve single
Displacement: 449cc
Bore x stroke: 96.0 x 62.1mm
Compression ratio: 12.0:1
Cooling: Liquid
Carburetion: Keihin FCR
Ignition: Digital AC-CDI
Starting: Electric, with primary kick backup
Transmission: Wide-ratio five-speed
Final drive: Sealed chain
Frame: Aluminum, perimeter design
Rake / trail: 27.1 degrees / 4.6 in.
Front suspension / wheel travel: 48mm inverted AOS-type cartridge fork with 22-way compression damping and 20-way rebound damping / 11.2 in.
Rear suspension / wheel travel: UNI-TRAK® single shock system with 22-way low-speed, two-turn variable high-speed compression damping and 22-way rebound damping / 11.0 in.
Front tire: 80/100x21
Rear tire: 110/100x18
Front brake / rear brake: 250mm petal rotor with hydraulic dual-piston caliper
/ 240mm petal disc with hydraulic single-piston caliper
Overall length: TBD
Overall width: TBD
Overall height: TBD
Seat height: TBD
Wheelbase: TBD
Ground clearance: TBD
Fuel capacity: 2.1 gal.
Dry weight: TBD
Color: Kawasaki Lime Green
MSRP: TBD
Wheelbase: 58.2 inches
Rake (Caster Angle): 27.05°
Trail: 115 mm (4.5 inches)
Seat Height: 37.9 inches
Ground Clearance: 13.6 inches
Fuel Capacity: 1.9 gallons

Suzuki RMZ450K8
Engine: 449cc, four-stroke, single-cylinder, liquid cooled, DOHC, 4-valve*
Bore & Stroke: 95.5 x 62.8mm*
Compression Ratio: TBD*
Fuel System: Electronic Fuel Injection*
Lubrication: Semi-dry sump*
Ignition: Digital AC-CDI*
Starter: Kick*
Transmission: 5-speed*
Final Drive: #520 chain*
Overall Length: 2182 mm (85.9 in)*
Overall Width: 822 mm (32.3 in)*
Overall Height: 1302 mm (51.2 in)*
Seat Height: 993 mm (39.0 in)*
Ground Clearance: 375 mm (14.7 in)*
Wheelbase: 1482 mm (58.3 in)*
Dry Weight: 103 kg (227 lbs)*
Suspension Front: Telescopic, cartridge-type fully adjustable rebound, compression and pre-load settings*
Suspension Rear: Link-type, spring preload fully adjustable rebound, compression and pre-load settings *
Brakes Rear Single hydraulic disc*
Tires Front: 90/100-21 51M*
Tires Rear: 120/90-19 57M*
Fuel Tank Capacity: 6.4 liter (1.69 gal.)*
Color: Yellow


Yamaha WR450F
Engine Type: 449cc liquid-cooled DOHC 4-stroke; 5 titanium valves
Bore x Stroke: 95.0mm x 63.4mm
Compression Ratio: 12.3:1
Carburetion: FCR-MX39 x 1
Ignition: CDI
Transmission: Constant-mesh 5-speed; multi plate wet clutch
Final Drive: Chain Drive
Chassis
Suspension/Front: Inverted fork; fully adjustable, 11.8-in travel
Suspension/Rear: Single shock; fully adjustable, 12-in travel
Brakes/Front: Hydraulic single disc brake, 250mm
Brakes/Rear: Hydraulic single disc brake, 245mm
Tires/Front: 80/100-21 51M
Tires/Rear: 110/100-18 64M
Dimensions
Length: 85.6 in
Width: 32.5 in
Height: 51.0 in
Seat Height: 38.6 in
Wheelbase: 58.5 in
Ground Clearance: 14.4 in
Dry Weight: 248 lb
Fuel Capacity: 2.1 gal