2009 Arctic Cat 150 ATV Service Manual, Page 61Get this manual
INSTALLING 1If removed, connect the vent hose onto the carburetor2If the throttle valve was removed, install the jet needle (C), needle holder (B), and spring (A) into the throttle valve (D) making sure the E-clip on the needle is in the fourth groove (counting from the top); then connect it to the throttle cable