Honda CRF450 2013 User Manual

Adjustments for Competition
Adjustments for Competition 111
Adjustments for Competition
This section tells you how to fine tune your CRF
for maximum competition performance.
Initial suspension adjustments should be
performed after a minimum of 2 hours of easy
break-in time.
Optional rear suspension springs are available in
order to tailor your CRF specifically for your
weight, riding style and course conditions.
Follow the instructions given in the rear
suspension sag setting section of Rear Suspension
Adjustments to determine if your combined rider
and sprung machine weight (rider fully dressed for
competition and machine coolant, oil and fuel
levels ready for competition) requires an optional
stiffer or softer rear spring. The need for either
optional rear spring may need to be balanced by
adjusting the PSF air pressure and oil capacity.
Front Suspension Adjustments.......................112
Front Suspension Damping........................112
Fork Springs...............................................113
Front Suspension Disassembly ..................114
Damper Oil Change ...................................118
Fork Assembly ...........................................120
Rear Suspension Adjustments........................127
Rear Suspension Spring Pre-Load .............127
Rear Suspension Damping.........................128
Rear Suspension Race Sag.........................129
Suspension Adjustments for
Track Conditions............................................131
Suspension Adjustment Guidelines ...............132
Tuning Tips ....................................................135
Spark Plug Reading....................................135
Steering Damper Adjustment.........................136
Steering Damper Damping ........................136
Steering Damper Adjustment Guidelines ......137
Chassis Adjustments ......................................138
Rear End.....................................................138
Fork Height/Angle .....................................138
Wheelbase ..................................................138
Gearing...........................................................139
Tire Selection for Track Conditions...............140
Personal Fit Adjustments ...............................141
Control Positioning ....................................141
Handlebar Position, Width & Shape..........141

Honda CRF450 2013 Specifications

General

Engine Type	449cc liquid-cooled single-cylinder four-stroke
Bore x Stroke	96.0mm x 62.1mm
Compression Ratio	12.5:1
Induction	Programmed Fuel Injection (PGM-FI), 46mm throttle body
Transmission	Close-ratio five-speed
Final Drive	#520 chain; 13T/48T
Rear Suspension	Pro-Link Showa single shock with spring preload, rebound and compression damping adjustability; 12.4 inches travel
Front Brake	Single 240mm disc with twin-piston caliper
Rear Brake	Single 240mm disc
Front Tire	80/100-21
Rear Tire	120/80-19
Wheelbase	58.7 inches
Seat Height	37.6 inches
Fuel Capacity	1.66 gallons
Front Suspension	12.2 inches travel