Yamaha SXV70ERJ, Owner'S Manual

Page: 66 / 100

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
U8EK12.book Page 9 Sunday, March 30, 2003 7:20 PM