2003 Yamaha Motorsports Big Bear 400 4x4 Owners Manual - Page 129
2003 Yamaha Motorsports Big Bear 400 4x4 Manual
Page 129 highlights
EBU00296 WARNING POTENTIAL HAZARD Improperly purging the exhaust system. Hot exhaust system. WHAT CAN HAPPEN Could injure the eyes. Could cause burns. Could cause carbon monoxide poisoning, possibly leading to death. Could start a fire. HOW TO AVOID THE HAZARD When cleaning the spark arrester: Always let the exhaust system cool prior to touching exhaust components. Always wear eye protection, and make sure no one is behind the vehicle. Never run the engine in an enclosed area. Make sure there are no combustible materials in the area. Carburetor adjustment The carburetor is a vital part of the engine and requires very sophisticated adjustment. Most adjusting should be left to a Yamaha dealer who has the professional knowledge and experience to do so. However, the idling speed may be performed by the owner as a part of the usual maintenance routine. CAUTION: The carburetor was set at the Yamaha factory after many tests. If the settings are disturbed by someone without sufficient technical knowledge, poor engine performance and damage may result. 8-18