ATV/UTV Action Magazine

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T ES T ED :

SPECS RATINGS HONDA YAMAHA TRX450R YFZ450R

MOTOR/TRANNY Overall power ................................ 4 .................... 5

Low .......................................... 3 .................... 5

Mid .......................................... 5 .................... 4

Top .......................................... 4 .................... 5

Throttle response........................... 4.................... 5

Gear ratio spacing.......................... 5.................... 5

Shifting/tranny ............................... 4 .................... 5

HANDLING AND CHASSIS Overall handling.............................. 4.................... 5

Turning precision............................ 4.................... 5

Turning stability ............................. 4 .................... 5

Powersliding .................................. 4 .................... 5

Steering ease ................................ 4 .................... 4

Off-cambers .................................. 4 .................... 5

High-speed stability........................ 5.................... 5

Jumping ........................................ 5 .................... 5

Whoops ........................................ 4 .................... 5

Front brakes.................................. 5.................... 5

Rear brakes................................... 5.................... 5

Front suspension............................ 4.................... 5

Rear suspension ............................ 4 .................... 4

Low-speed ride plushness ............... 5.................... 4

High-speed bump control ................ 4 .................... 5

Undercarriage protection ................ 4 .................... 4

Hillclimbing .................................... 5 .................... 5

Downhilling .................................... 5 .................... 5

RIDER COMFORT AND CONVENIENCE Overall ease of use......................... 5.................... 5

Startup ease ................................. 4 .................... 5

Seat comfort ................................. 5 .................... 5

Vibration ....................................... 4 .................... 5

Bars/seat/footrest.......................... 5 .................... 4

Air-filter access ............................. 5 .................... 5 Choke access................................. 4................. N/A Hand-control ease.......................... 5.................... 5

OVERALL Overall design................................ 5.................... 5

Fit and finish.................................. 5.................... 5

Overall rating................................. 4.................... 5

HONDA TRX450R YAMAHA YFZ450R

Engine type ...........Liquid/oil-cooled, 4-valve, SOHC 4-stroke .Liquid/oil-cooled, Ti 5-valve, DOHC 4-stroke Displacement .........................................................450cc ..................................................... 449cc Bore x stroke ...........................................96.0 x 62.0mm .....................................95mm x 63.4mm Compression ratio ................................................. 12.0:1 ..................................................... 11.6:1

Lubrication system ........................................... Wet sump .................................................Dry sump Carburetion...........................................40mm FCR Keihin ......................................42mm Mikuni EFI Starting/back-up ......................... Electric push-button/none ......................... Electric push-button/none Starting procedure....................... Pull clutch and hit button ......................... Turn on key and hit button Choke location .....................................Knob on left of carb ......................................................... N/A Air filter: Type.............................................................. Oiled foam ............................................... Oiled foam AccessRelease seat and four quick-release; remove one bolt ............ Release seat and 4 quick releases;

remove 1 bolt Transmission..................................... Fully manual 5-speed .................................Fully manual 5-speed Reverse procedure.................................................... None ....................................................... None Transmission pattern ..................................... 1-N-2-3- 4-5 ............................................. 1-N-2-3- 4-5

Drive system ........................................................... 2WD ....................................................... 2WD Final drive ............................................................... Chain ....................................................... Chain DIMENSIONS/CAPACITIES/WEIGHTS Fuel capacity ........................................................ 2. 7 gal. ................................................... 2. 6 gal.

Wheelbase.............................................................. 50. 2” .......................................................... 50” Overall length/width/height...................... 73. 3”/46.3”/43.3” .................................... 70. 7”/48.8”/41.9” Seat height ............................................................. 32. 8” ........................................................ 31. 9

Ground clearance....................................................... 4. 4” ......................................................... 4. 5” Claimed curb weight ............................................. 388 lb. ....................................................403 lb.

ROLLING CHASSIS Frame ...................... Steel round tube, aluminum subframe ....................................... Steel round tube Suspension/wheel travel: Front............ Dual A-arms w/ fully adjustable Showas/8.4” ... Dual A-arms w/ adj. hi/lo comp./reb./prel.

piggyback shocks/9.8” Rear................ Swingarm w/ adjustable Showa shock/9.3” ........ Swingarm w/adj. hi/lo comp./reb./prel.

piggyback shock/11.0”
Brakes/actuation:
Front............. Twin-piston hydraulic discs/ right-hand lever Twin-piston hydraulic discs/ right-hand lever
Rear.................................. Hydraulic disc/right-foot pedal .................... Hydraulic disc/right-foot pedal
Parking ............................................... Left-hand lever/lock ................................... Left-hand lever/lock
Tires:
Front............................. 22 x 7-10 Dunlop KT371 radials .............................21x7-10 Dunlop KT355

Rear............................ 20 x 10-9 Dunlop KT335H radials .............................20x10-9 Dunlop KT356

DETAILS Lighting: Front.........................................30W halogen headlights ..................... Two 30W Krypton headlights Rear..................................................LED tail/brake light .................... 3.9/0.5W LED tail/brake light Instrumentation ......................................................... N/A ....................... Temp/fuel/neutral indicators Colors ......................................... Red/white, white/orange ............................. Blue, white/graphics kit Minimum recommended operator age............................ 16 ........................................................... 16