2003 Polaris ATV Trail Boss 330 Factory Service Manual, Page 93Get this manual
FUEL SYSTEMCARBURETION 1Carburetor Assembly
BST 34 CARBURETOR EXPLODED VIEW
2Screw 3Throttle Valve 4Cover, Diaphragm 5Jet Block Assembly 6Spring
7Diaphragm Assembly 8Ring 9"E" Ring
10Ring 11Needle Jet 12Cover 13O-Ring
14Throttle Shaft Assembly
6 11 44 43 40 41 42 45 50 13 38 29 28 14 46 12
15Ring 16Seal 17Spring 18Packing 19"E" Ring 20Cap 21Screw 22Drain Screw 23O-Ring 24Washer 25Adjuster 26Spring
15 16 18 19
29Washer
27Pilot Jet 28Main Jet