2002-2006 Yamaha SX Viper 700 Series Snowmobile Service Manual, Page 57Get this manual

2002-2006 Yamaha SX Viper 700 Series Snowmobile Service Manual, Page 57

CARBURETOR TUNING Trouble Diagnosis Adjustment INSP ADJ Poor performance at Clogged or loose pilot jet Remove the pilot jet,
then install it Make sure that the main jet is fully tightenedClogged fuel line Dirty fuel tank Clean or replace the fuel
lineClean the fuel tank Air leaks into the fuel line Tighten or replace the fuel line jointLow fuel pump perfor- Repair or
replace the fuel pumpmance Clogged fuel filter Clogged intake Abnormal combustion: Lean mixture Dirty carburetors Backfiring
Overflow: Poor idling Dirty or clogged fuel line Clogged air vent Clogged float valve Replace the fuel filterRemove any obstructions
(e.g ice)Clean and adjust the carburetorsClean the carburetorsClean or replace the fuel lineClean the air vent Disassemble
and clean the float valve Do not scratch the valve seat Clean or replace the float valve and valve seat The valve seat and
body must be replaced as setReplace the floatCheck and, if necessary, replace the following parts: Float tang Float (entire