Honda's race-ready TRX450R-
available in manual- and electric-start versions-
has won in virtually every ATV racing discipline,
adding two-time Baja 1000 winner to its mantel
last year.
New White and Black/Flame
colors join Red on the TRX450ER
2007
TRX450ER and TRX450R Sport ATV
Honda
TRX450R/ER Engine/Drivetrain
Powerful four-stroke 450cc
liquid-cooled four-valve Unicam(R) engine
is based on the award-winning CRF(R)450R
motocross and CRF450X off-road engines.
Compact, lightweight engine
designed specifically for ATV usage is worthy
of its CRF heritage.
Unicam valve train provides
the light weight of a compact single-cam
drive and the optimum combustion chamber
shape for maximum power at all engine rpm.
Unicam valve train features
a carburized single camshaft that directly
actuates two 36mm titanium intake valves.
The camshaft exhaust lobe actuates two 30mm
steel exhaust valves via a forked, low-friction
roller rocker arm.
Electric-start version
features an electric starter that drives
the clutch side of the crankshaft to provide
superior lubrication of starter gears and
to produce a narrow engine with a short,
strong crankshaft.
Lightweight, compact,
internal auto decompressor provides superb
cold-starting and hot-starting operation.
Kickstart version incorporates
ATV-type forward kickstarting for ease of
starting and light weight.
Crankshaft is made of
high-strength, low-carbon steel with carburized
main journals for maximum durability at
sustained high-rpm operation.
Cylinder-head cover is
made of magnesium to reduce engine weight.
Forged three-ring 12.0:1
compression slipper piston is lighter than
a conventional design, revving quickly while
maintaining excellent cylinder sealing and
high-rpm power.
Maximum engine rpm is
9850.
Double-carburized connecting
rod utilizes a big-end needle bearing for
maximum high-rpm performance and durability.
Nikasil cylinder lining
is lightweight and provides cooler and quieter
operation for extended engine life.
Press-fitted steel spark-plug
pipe fits between forked exhaust rocker
arms, further contributing to compact cylinder-head
design.
40mm Keihin FCR-type carburetor
features four rollers on the flat slide,
resulting in very light throttle effort,
smooth operation, crisp throttle response
and excellent rideability.
Carburetor features a
throttle position sensor (TPS) that helps
maintain linear response throughout the
rpm range.
Twin-sump lubrication
system separates the oil supply for the
crankshaft, piston and valve train from
the clutch and transmission. This ensures
a cool supply of oil to the clutch, eliminates
clutch and transmission material contamination
to the engine oil and reduces the amount
of circulating oil and the required size
of the oil pump.
Vertically split crankcases
feature a built-in oil pump, reducing weight
compared to a conventional design.
Left-side countershaft
bearing and axle carrier feature double-row
bearings for added durability.
Exhaust system uses a
lightweight stainless steel header and muffler.
Exhaust system and free-flowing
muffler increase performance while maintaining
low noise levels.
Radiator is lighter weight
and has revised fin pitch for improved airflow
in all riding conditions.
Compact, flat radiator
fan is lightweight and provides efficient
cooling.
Gear-driven balancer reduces
vibration and drives the water pump. Eight
clutch plates provide the surface area necessary
to handle the engine's massive torque.
Durable five-speed transmission
with low ratios designed to match engine
power characteristics.
Transmission ratios designed
for racing applications and trail use.
Honda
TRX450R/ER Chassis/Suspension
Rider's position features
low handlebar, seat and footpegs for improved
center of gravity and rider feel.
Round-tube steel frame
with removable aluminum subframe is lightweight
and durable.
One-piece cast-aluminum
swingarm for light weight, maximum strength
and durability.
Independent double-wishbone,
double A-arm front suspension with fully
adjustable Showa shocks provide 8.4 inches
of travel, and features rear-facing reservoirs
for increased durability.
Pro-Link(R) rear suspension
with fully adjustable Showa piggyback shock
provides 9.3 inches of travel.
Dual 174mm front disc
brakes with twin-piston calipers and high-pressure
front brake lines provide excellent stopping
power.
190mm rear disc and beefy
single-piston caliper provide improved stopping
power and increased ground clearance.
Aluminum brake calipers
and brackets front and rear reduce weight.
Removable aluminum rear
grabrail and front bumper for reduced weight.
Lightweight aluminum wheels
reduce unsprung weight for outstanding handling.
Dunlop radial tires provide
superb traction and cornering ability.
Durable and lightweight
O-ring- sealed drive chain.
Additional
Features
Throttle lever and carburetor
feature full-closed detection system.
Engine design meets California
Air Resources Board (CARB) off-road emissions
standards.
Convenient oil-level window
allows for at-a-glance oil check.
Long, narrow seat is designed
for superior comfort and performance in
all operating conditions. Saddle is also
easy to remove for convenient access to
the air filter.
Large air filter allows
maximum airflow for maximum engine power.
Airbox designed for improved
airflow and increased power.
Adjustable dual headlights
with 30w bulbs and improved reflectors for
excellent visibility and distinctive appearance.
Headlight shape for race-derived
look.
Pivot-access brake calipers
for easy pad replacement.
Engine cases protected
by high-impact plastic skid-plate.
LED tail/brakelight to
shed weight and add an aggressive appearance.
CRF-style clutch and front
brake lever.
Wide footpegs for improved
rider control.
Aluminum shift and brake
pedals.
CRF-type handlebar grips.
Honda Racing(TM)-inspired
colors and graphics.
Optional HRC Racing Kit
available.
Transferable six-month
limited warranty; extended coverage available
with a Honda Protection Plan.
Purchase of a new, previously
unregistered Honda unit by an individual
retail user in the United States qualifies
the owner for a one-year complimentary membership
in the Honda Rider's Club of America(TM)
(HRCA(R)). Benefits include online access
to the Honda Common Service Manual, six
issues of the bimonthly Honda Red Rider(TM)
magazine, travel discounts, trip routing,
MSF reimbursement, plus access to the HRCA
Web site (www.hrca.honda.com). Look for
the HRCA support team at select off-road
events across the country. For details on
the HRCA, dealers should call (310) 783-3958,
8:30 a.m. to 5 p.m. Pacific Time.
