1999-2001 Yamaha Phazer 500 / Venture 500 service manual, Page 49Get this manual

1999-2001 Yamaha Phazer 500 / Venture 500 service manual, Page 49

CARBURETOR TUNING 2E311 Main jet selection chart Spark plug color Light tan or gray Dry black or fluffy deposits White or
is clogged or frozen Add gasoline Adjustment Return the starter lever to its seated position so that the starter valve is
fully closed Check and, if necessary, clean the fuel tank air vent, the fuel filter and all of the fuel passages Check and,
if necessary, clean the carburetor air vents, fuel passages and the float valve Clean the float chamber of any ice or waterAdjust
the fuel levelAdjust the engine idle speedRefer to "Low speed tuning"Replace the pilot screwClean the bypass hole Remove
the pilot jet, clean it with compressed air and then install it Make sure that the pilot jet is fully tightenedRetighten
the clamp screws on the carburetor jointsClean or replace the starter valve seatAdjust the fuel level Overflow Poor idling:
Improper idling speed Poor performance at adjustment low speeds Damaged pilot screw Poor acceleration Clogged bypass hole
Slow response to Clogged or loose pilot throttle Engine tends to stall jet Air leaking into the carburetor joint Defective