S&S Cycle Super E and G Series Shorty Carburetors User Manual

Page 24

Closing adjusting screw with excessive force may cause irreversible damage to screw threads in carburetor body.

3- Perform intermediate and high speed jetting tests to determine proper jetting.
4- With engine warm and at idle, blip throttle and note throttle response.
5- Turn pump travel screw outward or counter clockwise about 1⁄4 turn at a time and recheck throttle response until engine no longer

hesitates. This is usually about two turns out.

6- Road test motorcycle noting throttle response at idle and at levels in 500 rpm increments from idle to 3000-3500 rpm.
7- Set pump travel screw at point where best throttle response is noted with minimum pump travel. Minimum pump travel is recommended

to conserve fuel, prevent spark plug fouling, and curtail black smoke from pipes when “blipping” throttle. Black smoke from pipes is
usually an indication of a rich condition or excessive accelerator pump travel.

NOTE: Final accelerator pump adjustment should be confirmed by riding motorcycle and noting throttle response with motorcycle underway. Because of
displacement, compression ratio, cam timing, exhaust design and other, related factors, many engines will stumble or bog if throttle is abruptly cranked
fully open with engine at idle. If correct carburetor (E or G) is installed and engine properly tuned and equipped with appropriate exhaust and cam,
stumble should disappear under normal riding conditions.

GENERAL INFORMATION NOTES:

•

Carburetor body has six drilled passages that are permanently sealed with drive plugs.

Removal of these plugs may cause irreversible damage to carburetor.

•

To insure proper seal so needle completely shuts off fuel supply entering bowl, float hinge, needle lift and needle must work freely and not bind. Float must
not contact bowl gasket. If problem is suspected, remove bowl and check float movement. If obvious misalignment, binding or sticking occurs, remove,
straighten and reinstall to obtain free movement. Reset float level and double check for free movement. To check, remove bowl (not accelerator pump
cap) and raise float until needle is in closed position and spring in top of needle is compressed. Top of float opposite the needle and seat assembly should
be 1⁄8" to 3⁄16" below bowl gasket surface. Float must not contact bowl gasket. See cut away bowl in Picture 48.

•

When motorcycle is not running, fuel shutoff valve should always be turned off to prevent possible leakage should needle and seat not seal completely.

Gasoline leaking past inlet needle may flood engine causing contamination of oil supply and damage to engine.

Any gasoline leak constitutes a fire and health hazard.

CAUTION

WARNING

Picture 48