Edelbrock YFZ450 - Manual
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INSTRUCTION SUPPLEMENT FOR 2004-
LATER YAMAHA YFZ450
Removing stock c arburetor and c able s.
1.
Remove se at a n d g as ta nk.
Ma k e sure fuel
petcoc k is in “off” position.
2. Remove throttle ca ble p aying close a tte n tio n
to rou tin g , as th e n ew ca ble(s) will ne e d to o
b e ro ute d th e same .
3. Remove stock carb uretor a n d stock throttle
h o using . Stuff a clea n, dry rag in to ma nifold
to ke e p d e bris o u t o f motor.
IMPORTANT NOTE:
This machin e is e q uip p e d
with a throttle over-ride system (TORS) a n d a
n e utral safe ty switch. Yo u must u n plu g th e
TORS
From the wir ing harne s s loc ated ne ar the
steer ing stem top mount.
Th e n e utral sa fety
switch loca te d o n th e clutch p erch must also b e
remove d a n d u n plu g g e d. O nce u n plu g g e d ,
ta p e th e two wires to g eth er th at come o ut of th e
wiring h arness.
Carburetor installation
1. Carefully trim th e ru b b er alignme nt ta b off o f
th e face of th e ma nifold with a razor bla d e or
side cu tters.
2. Remove th e h ex pip e plu g from th e carb ca p
using a 1 1mm or 7 /1 6 wrench.
Do not
dis c ard plug, a s it will be ne eded later.
Install th e me tering a djustme n t to ol includ e d
in th e h ardware kit.
Do not ov er-tighten a s
damage ma y oc cur to c ap.
1. Attach fu el line to carburetor a n d secure with
clamp.
2.
Place carburetor into ma nifold a n d air b o o t.
Tigh te n clamps with carb sittin g as close to
vertical as p ossible.
Twist Throttle Instructions
1. Install th e throttle ca bles into th e su p plied
throttle h o using a n d place o nto cle a n
h a n dle b ar e n d .
2. Rou te throttle ca bles throu g h frame as stock
cable was route d .
3. Install th e p ull ca ble in to th e 8 :0 0 p osition
a n d th e return ca ble e n d into th e 1 1:0 0
p osition o f th e ca ble wh e el. Secure ca bles
to ca ble bracket by replacing e n d piece a n d
Phillips screw. Se e fig ure 2 .
NOTE: SEE FIGURE 1 TO ID ENTIFY CABLES.
The bottom c able is the pull c able .
Figure 1 .
Fig ure 2.
Thumb Throttle Instructions
NOTE:
Modificatio n o f th e stock th umb
throttle h o using will be req uired in ord er to
achieve wide o p e n throttle . Figure 3 will
show th e mo ds.
Figure 3.
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