2003 Yamaha Motorsports SXViper Mountain Owners Manual - Page 63

2003 Yamaha Motorsports SXViper Mountain Manual

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Standard main jet: # 156.3 CD-04E Main jet 1 Mixture Lean Rich Condition Warm weather High altitude Cold weather Low altitude Small No. Large No. 1. Loosen the carburetor clamps and remove the carburetor. 2. Pinch the fuel hose to prevent fuel flowing. 3. Remove the drain plug and install the proper main jet. 4. Assemble by reversing the removal steps. WARNING @ Make sure that the throttle outer cable is firmly seated in the holder and throttle operates smoothly after assembling the carburetor. @ ESU00156 Yamaha Power Valve System (Y.P.V.S.) The Y.P .V.S. is a vital part of the engine and requires very sophisticated adjustment. Adjustment should be left to a Yamaha dealer who has the professional knowledge, specialized data and equipment to do so properly. .V.S. 1 Y.P CAUTION: @ The Y.P.V.S. has been extensively tested and set at the Yamaha factory. Changing these settings without sufficient technical knowledge may result in poor performance of or damage to the engine. @ 8-9

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8-9
CD-04E
1. Loosen the carburetor clamps and remove the carbu-
retor.
2. Pinch the fuel hose to prevent fuel flowing.
3. Remove the drain plug and install the proper main jet.
4. Assemble by reversing the removal steps.
WARNING
@
Make sure that the throttle outer cable is firmly
seated in the holder and throttle operates smoothly
after assembling the carburetor.
@
ESU00156
Yamaha Power Valve System (Y.P.V.S.)
The Y.P.V.S. is a vital part of the engine and requires very
sophisticated adjustment.
Adjustment should be left to a Yamaha dealer who has
the professional knowledge, specialized data and equip-
ment to do so properly.
1
Y.P.V.S.
CAUTION
:
@
The Y.P.V.S. has been extensively tested and set at
the Yamaha factory. Changing these settings without
sufficient technical knowledge may result in poor
performance of or damage to the engine.
@
Standard main jet:
# 156.3
Main jet
1
Mixture
Condition
Small No.
Lean
Warm weather
High altitude
Large No.
Rich
Cold weather
Low altitude