S&S Cycle Super E and G Series Shorty Carburetors - Manual (Page 21)

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d- If engine runs flat and sluggish or "blubbers" or will not take throttle, decrease or lean main jet size .004" smaller and road test
again. Note engine smoothness and how easily engine reaches rpm where gear shift occurs.
e- Continue changing main jets until jet which makes engine accelerate or rpm through gears quickest and smoothest is identified.
S&S's® experience is that jetting about .006" smaller (leaner) than correct will make engine break up and quit. Jetting about .006"
larger (richer) will make engine blubber and miss.
NOTES:
•
Correct carb jetting is essential for optimum performance on street, strip and dynamometer. Other common causes of poor performance in modified
engine are inappropriate exhaust and incorrect ignition timing.
•
S&S special main jet tool is extremely handy for changing main jets. Try it, you'll like it!
E- Troubleshooting Tips for Intermediate and High Speeds Engine will not run at steady speed or rpm or quits for no apparent reason:
1- Restriction in fuel supply system - Gas tank vent plugged, needle and seat not working properly (See "General Information"), gas
petcock too small, or defective vacuum petcock. Stock petcock is generally adequate, but may require running on reserve to provide
sufficient fuel for big inch engines. If fuel delivery to carb is questionable, S&S recommends Pingel brand high flow petcock.
2- Faulty ignition/electrical system - Fouled plugs, worn points or condenser, defective coil or solid state module, improper ignition
timing, loose wire, faulty circuit breaker or ignition switch. Many ignition/electrical problems occur repeatedly at same rpm because of
vibration specific to that rpm.
3- Incorrect intermediate and/or high speed jetting. See "Adjusting Carb - Intermediate System" and "High Speed Circuit or Main Jet."
4- Foreign material in air or gas passageway in carb causing flow restriction. Picture 41 (page 19) shows intermediate air bleed metering
hole. Picture 44 shows main discharge air bleed metering jet. Use compressed air to clear holes.
Do not use wire or drill to clear hole in carb bowl. If size of hole is altered, starting system will be altered and carburetor bowl irreversibly
damaged.
Compressed air and particles dislodged by compressed air are potentially harmful to eyes and body. Wear protective goggles when using
compressed air and always direct air stream away from yourself and others nearby.
NOTE: Small amounts of engine oil deposited on air cleaner element by crankcase or cylinder head vent is normal and should not cause problem.
Picture 44
CAUTION
WARNING