ENGINE
394
body
accessories
handlebar
& grips
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levers
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& ignition
engine
fuel &
intake
clutch
brakes
drive
steering &
suspension
bearings
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tools &
shop
exhaust
HOT CAMS DIRT BIKE
continued
MODEL
YEAR
DESCRIPTION
CAMSHAFTS
SHIM KIT
EXHAUST
DURATION
EXHAUST
LIFT
EXHAUST
LOBE
CENTER
EXHAUST
VALVE
LASH
INTAKE
DURATION
INTAKE
LIFT
INTAKE
LOBE
CENTER
INTAKE
VALVE
LASH
YAMAHA CONTINUED
YZ 250F 01-13 Stage 2 Gold Series: Dual cam engine. Intake
and exhaust cams sold separately. Mid to
top RPM application. Requires valve spring
kit PART #VSK4001EX. Uses stock auto
decompression mechanism.
870343 229.95
G
870966 89.95
G 256 8.76 102.5 0.2
0
0
0
0
YZ 250F 01-13 Stage 2 Gold Series: Dual cam engine. Intake
and exhaust cams sold separately. Mid to top
RPM application. Requires valve spring kit
PART #VSK4001IN.
870342 229.95
G
870966 89.95
G 0
0
0
0
261 8.79 110 0.15
YZ 450F 03-09 Dual-cam motor: intake and exhaust cams
sold separately. Excellent midrange and
top-end increase. Exhaust cam includes auto-
decompression mechanism. Uses stock valve
springs.
870356 199.95
G
870967 89.95
G 265 8.67 103
0.2
0
0
0
0
YZ 450F 03-09 Stage 1: Dual cam engine. Intake and exhaust
cams sold separately. Excellent midrange and
top-end increase. Uses stock valve springs.
870353 199.95
G
870967 89.95
G 0
0
0
0
269 8.86 110 0.15
YZ 450F 03-09 Stage 2 exhaust: Dual cam motor. Added top
end over stage 1. Uses stock valve springs.
Include auto decompression mechanism.
870358 199.95
G
870967 89.95
G 253.5 8.74 97.25 0.2
0
0
0
0
YZ 450F 03-09 Stage 2 intake: Dual cam motor. Added top
end over stage 1. Uses stock valve springs.
870357 199.95
G
870967 89.95
G 0
0
0
0
260 8.89 108 0.15
YZ 450F 10-13 4165-2IN and 4166-2E when used as a
set provide increased mid-top torque and
horsepower. Produces more power than the
OE cams from 6000 rpm and up with a slight
loss at lower rpm. Produces more power than
the stage 1 set from 8000 rpm and up.
870361 199.95
G
870967 89.95
G 0
0
0
0
265 9.78 104.5 0.1
YZ 450F 10-13 4165-2IN and 4166-2E when used as a
set provide increased mid-top torque and
horsepower. Produces more power than the
OE cams from 6000 rpm and up with a slight
loss at lower rpm. Produces more power than
the stage 1 set from 8000 rpm and up.
870362 199.95
G
870967 89.95
G 254
8.9
102 0.15
0
0
0
0
YZ 450F 10-13 The 4167-INBLD intake cam provides the
lowest RPM torque. When used with the
#4170-EXBLD, the set makes a great torque
set up good for Supercross and other riding
situations which require good throttle response
and increased partial throttle torque. Uses
870363 295.95
G
870967 89.95
G 0
0
0
0
249 8.9 106.5 0.1
YZ 450F 10-13 The 4169-INBLD provides the highest
RPM air flow. When used as a set with the
#4171-EXBLD exhaust cam modified engines
will produce good high RPM horsepower. Uses
stock valve springs.
870365 295.95
G
870967 89.95
G 0
0
0
0
265 10.92 106 0.1
YZ 450F 10-13 The 4170-EXBLD exhaust cam provides
the lowest RPM torque. When used with the
#4167-INBLD, the set makes a great torque
set up good for Supercross and other riding
situations which require good throttle response
and increased partial throttle torque.
870366 295.95
G
870967 89.95
G 249 8.64 106.5 0.15
0
0
0
0
YZ 450F 10-13 This cam provides slightly more exhaust flow
than the #4171-EXBLD. Uses stock valve
springs.
870368 295.95
G
870967 89.95
G 265 10.16 104 0.15
0
0
0
0
YZ 450F 10-13 This cam provides slightly more intake flow
than the Stage 2 #4165-2IN. Uses stock valve
springs.
870364 295.95
G
870967 89.95
G 0
0
0
0
265 10.16 106 0.1
YZ 450F 10-13 THIS IS THE CAM SET THAT WILL
SUIT MOST RIDERS IN MOST RIDING
SITUATIONS. 4163-1IN and 4164-1EX when
used as a set provide increased low - mid rpm
torque up to 9000 rpm and improved peak
torque with a no loss at high rpm. Throttle
response is also improved
870360 199.95
G
870967 89.95
G 249 8.64 101.5 0.15
0
0
0
0
