The following is from American Honda regarding a recall of the 2015 and 2016 Honda CRF450R model:
Year: 2016
Category: Motorcycles
Sub-Category: Motocross
Model: CRF450R
Number of Potential Recalls: 1
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Last Updated: Sep 13, 2017
CPSC RECALL NUMBER: RP170451
Campaign Description: ’15’16 CRF450R GEAR RECALL
mfr campaign id: KH3
recall date: 09/05/2017
recall status: VIN/HIN Required
Summary:
THE TRANSMISSION COUNTERSHAFT 5TH (C5) GEAR, USED FOR ENGAGING 3RD GEAR, MAY BREAK UNDER CERTAIN RIDING CONDITIONS.
SAFETY RISK:
IF THE C5 GEAR BREAKS, THE TRANSMISSION CAN SEIZE AND CAUSE THE REAR WHEEL TO LOCK. A REAR WHEEL THAT LOCKS WHILE RIDING INCREASES THE RISK OF A CRASH.
REMEDY:
CALL ANY AUTHORIZED HONDA MOTORCYCLE DEALER AND MAKE AN APPOINTMENT TO HAVE THE C5 GEAR REPLACED, FREE OF CHARGE. FOR ASSISTANCE WITH LOCATING A HONDA MOTORCYCLE DEALER, YOU MAY CALL HONDA MOTORCYCLE CUSTOMER SUPPORT AT 1-866-784-1870. HONDA’S CAMPAIGN NUMBER FOR THIS RECALL IS KH3.
Read more at http://powersports.honda.com/recall-information.aspx#UYtP7yAWAJuqYiaY.99
016 Honda CRF450R Specifications
Engine Type: 449cc liquid-cooled single-cylinder four-stroke
Bore and Stroke: 96.0mm x 62.1mm
Compression Ratio: 12.5:1
Valve Train: Unicam, four-valve; 36mm intake, titanium; 31mm exhaust, steel
Induction: Dual-Timing PGM-FI, 46mm throttle body
Ignition: Full transistor with electronic advance
Transmission: Close-ratio five-speed
Final Drive: #520 chain; 13T/48T
Suspension
Front: 48mm inverted KYB PSF (Pneumatic Spring Fork) with air-adjustable spring rate, and rebound and compression-damping adjustability; 12.2 inches travel.
Rear: Pro-Link, KYB single shock with adjustable spring preload, rebound damping adjustability, and compression damping adjustment separated into low-speed and high-speed; 12.4 inches travel
Brakes
2016-Honda-CRF450R-TFront: Single 260mm wave-style disc with twin-piston caliper
Rear: Single 240mm wave-style disc
Tires
Front: Dunlop MX52 80/100-21
Rear: Dunlop MX52 120/80-19
Wheelbase: 58.8 inches
Rake (Caster angle): 27° 04’ (‘= minutes)
Trail: 116mm (4.6 inches)
Seat Height: 37.5 inches
Ground Clearance: 13.0 inches
Fuel Capacity: 1.7 gallons
Claimed Curb Weight*: 243.0 pounds
Color: Red
*Includes all standard equipment, required fluids and full tank of fuel—ready to ride.