Yamaha YZ450F User Manual

TRANSMISSION
5-73
2. Install:
• Collar “1”
• 2nd wheel gear (23T) “2”
• 4th wheel gear (24T) “3”
• 3rd wheel gear (26T) “4”
• 5th wheel gear (20T) “5”
• Collar “6”
• 1st wheel gear (27T) “7”
• O-rings “8”
(to the drive axle “9”)
TIP
• Before installation, apply molybdenum disul-
fide oil to the inner and end surface of the idler
gear and to the inner surface of the sliding
gear, then install.
• Apply the lithium-soap-based grease on the
O-ring.
3. Install:
• Washer “1”
• Circlip “2”
TIP
• Be sure the circlip sharp-edged corner “a” is
positioned opposite side to the washer and
gear “b”.
• Install the circlip with its ends “c” settled even-
ly on the spline crests.
4. Install:
• Collar “1”
TIP
• Apply the lithium soap base grease on the oil
seal lip.
• When installing the collar into the crankcase,
pay careful attention to the crankcase oil seal
lip.
5. Install:
• Main axle “1”
• Drive axle “2”
TIP
• Install to the left crankcase simultaneously.
• Apply engine oil to the main axle and the drive
axle bearing.
New
2
9
8
3
4
5
6
7
New
M
LS
1
New
2
1
2
a
b
cc
1
2
EE

Yamaha YZ450F Specifications

General

Displacement	449cc
Bore x Stroke	97.0 mm x 60.8 mm
Transmission	5-speed
Final Drive	Chain
Width	32.5 in
Seat Height	38.2 in
Wheelbase	58.5 in
Fuel Capacity	1.6 gal
Fuel System	Fuel Injection
Front Suspension	KYB® Speed-Sensitive System inverted fork; fully adjustable, 12.2-in travel
Front Brakes	Hydraulic single disc, 270mm
Rear Brakes	Hydraulic single disc
Front Tire	80/100-21
Rear Tire	120/80-19
Wet Weight	245 lbs
Engine Type	Liquid-cooled, 4-stroke, DOHC, 4-valve