2006 Arctic Cat Y-6/Y-12 50cc and 90cc Service Manual, Page 117Get this manual
Fuel System Problem: Starting impaired Condition 1Carburetor leaking air
2Choke not operating properly Problem: Idling or low speed impaired Condition 1Slow jet obstructedloose 2Needle Jet obstructed 3Pilot screw setting incorrect 4Float level incorrect Problem: Medium or high speed impaired Condition 1Main jet obstructed 2Needle jet obstructed 3Throttle valve not operating properly 4Filter obstructed 5Float level incorrect Problem: Overflow and fuel level fluctuations Condition 1Needle valve worndamageddirty 2Float not working properly 3Float level too hightoo low