PJ1 Professional Carburetor & Choke Cleaner is designed to clean, degrease and remove varnish and other contaminants from motorcycle carburetors, passages and components. Ideal for quick cleaning injectors, carburetor jets, control valves, linkages, and other carburetor and choke parts. The PJ1 Professional Line of environmentally safe shop chemicals all contain non-chlorinated solvents that wont contaminate motor oils.