2001-2005 Yamaha WaveRunner GP800R Factory Service Manual, Page 348Get this manual
E EJU00573
Adjusting the carburetor
The carburetor is vital part of the engine and requires very sophisticated adjustmentMost adjusting should be left to Yamaha dealer who has the professional knowledge and experience to perform itHowever, the operator may adjust the trolling speed as part of the usual maintenance routine
CAUTION:
The carburetor was set at the Yamaha factory after many testsIf the settings are disturbed by someone who does not have the necessary technical knowledge, poor engine performance and damage may result