1987-2003 Yamaha YFZ350 Banshee supplementary service manual, Page 166Get this manual
1CARBURETOR 1 11Remove: Cover (T.O.R.Sswitch-Left) (D Throttle valve cable
INSPECTION 1Inspect: Carburetor body ContaminationCleanNOTE: Use petroleum based solvent for cleaningBlow out all passages and jets with compressed air
2Inspect:
Valv seat Needle valve (2) WearContaminationReplaceNOTE: Always replace the needle valve and valve seat as set