Where it says “should be as listed on carburetor spec sheets”, this is referring to the data tables included in our kit instruction sheets which are available on the website for free, here.

NOTE: gauges are no longer readily available, we use the spec sheets to measure spacing as needed.

FLOAT ADJUSTMENTS

FLOAT ALIGNMENT

1. Sight down the side of the float shell to determine if the side of the float is parallel to the outer edge of the air horn casting. TO ADJUST: Bend float lever by applying pressure to the end of the float shell with the fingers while supporting the float lever with the thumb.

CAUTION: To avoid damaging the float, apply only enough pressure to bend the float lever.

1. After aligning float, remove as much clearance as possible between arms of float lever and lugs on air horn by bending the float lever. Arms of the float lever should be parallel to the inner surfaces of lugs on the air horn as possible.

   Floats must operate freely without excess clearance on its hinge pin.

FLOAT LEVEL

With air horn inverted, bowl cover gasket in place, and needle seat, the clearance between top of float (at outer end) and air horn gasket should be as listed on the carburetor spec page. To adjust, bend float arm.

Adjust both floats. Recheck float alignment.

FLOAT DROP

With bowl cover held in upright position and measuring from outer end of each float, the distance between top of floats and bowl cover gasket should be as listed on carburetor spec sheets. To adjust, bend stop tabs on float brackets.

ACCELERATOR PUMP ADJUSTMENTS

PUMP LINKAGE ADJUSTMENT

1. Back out idle speed screw until throttle valves seat in bores of carburetor. NOTE: Be sure fast idle adjusting screw does not contact fast idle cam and hold throttle valves open.
2. With throttle connector rod in center hole (medium stroke) of pump arm, the distance from the top of the bowl cover to the top of the plunger shaft should be as listed on the carburetor spec page.
3. Adjust by bending throttle connector rod aat lover angle as indicated in the illustration.

CHOKE ADJUSTMENT

CHOKE PISTON LEVER ADJUSTMENT

With choke valve tightly closed, the clearance between the choke lever and stop in piston housing should be as listed on the carburetor spec sheet. To adjust, bend the choke connector rod as indicated in the image.

FAST IDLE LINKAGE ADJUSTMENT

With choke valve tightly closed and lug on outer choke shaft lever contacting stop on inner choke shaft lever, align center of fast idle screw with index mark on cam. To adjust, bend fast idle connector rod as indicated in the image.

FAST IDLE THROTTLE VALVE CLEARANCE ADJUSTMENT

With choke valve tightly closed, tighten fast idle adjusting screw (on index mark of cam) until the clearance between throttle valve and bore of carburetor, side opposite idle port, is as listed on the carburetor spec sheet.

UNLOADER ADJUSTMENT

With throttle wide open, the clearance between upper edge of choke valve and inner wall of air horn should be as listed on carburetor spec pages. To adjust, bend unloader lip on throttle shaft lever.

SECONDARY ADJUSTMENTS

SECONDARY THROTTLE LEVER ADJUSTMENT

1. Block choke valve wide open
2. Secondary throttle valves are opened to the clearance as listed on the specification pages between lower edge of valve and bore (opposite idle port). To adjust, bend throttle operating rod.

NOTE: Primary and secondary throttle valves should reach wide open position, full vertical, at the same time.

1. With primary and secondary throttle valves in tightly closed position, there should be the clearance as listed on specification page between positive closing shoes on primary and secondary throttle levers. To adjust, bend shoe on secondary lever.

SECONDARY THROTTLE LOCK-OUT ADJUSTMENT

Crack throttle valves and manually open and close the choke valve. Tang on secondary throttle lever should freely engage in notch of lock-out dog. If necessary to adjust, bend tang on secondary throttle lever.