S&S Cycle Super E/G Accelerator Pump Rebuild Kit - 11-2918

The S&S Cycle Super E/G Accelerator Pump Rebuild Kit (part number 11-2918) is the factory-correct solution for restoring proper accelerator pump function in S&S Super E and Super G carburetors. If your bike hesitates on throttle roll-on, bogs off idle, or stumbles under acceleration, a worn accelerator pump diaphragm or failed check ball is often the culprit — and this complete rebuild kit gives you everything needed to bring your S&S carb back to spec in one package.

Key Features & Benefits

• Complete accelerator pump rebuild in one kit: Rather than hunting down individual components, this kit consolidates all the wear items into a single purchase, saving time and reducing the chance of missing a critical part during the repair.
• Includes the diaphragm: The diaphragm is the heart of the accelerator pump circuit. A cracked or hardened diaphragm causes the classic hesitation and bog that riders notice when cracking the throttle open. Replacing it with a fresh unit restores crisp throttle response.
• Diaphragm spring included: The spring maintains proper diaphragm tension. A fatigued spring can cause weak or erratic fuel delivery under acceleration — this kit replaces it alongside the diaphragm for a thorough repair.
• Check balls and check ball spring: These small but critical components control the one-way flow of fuel through the accelerator pump circuit. Worn or stuck check balls are a frequent cause of flat spots and unresponsive throttle, especially on older carbs.
• Pump pushrod included: The pushrod mechanically actuates the diaphragm when the throttle is opened. Having a replacement on hand means you can address wear at every link in the pump mechanism.
• Required hardware and o-rings: The kit ships with the necessary hardware and o-rings so you don't need to source seals separately. This helps ensure a leak-free reassembly.
• Direct-fit S&S component: Made specifically for S&S Super E and Super G carburetors, so fitment and component geometry are matched to your carburetor's original design — no modification required.

Specifications

• Brand: S&S Cycle
• Part Number: 11-2918
• Style: Accelerator Pump Rebuild Kit
• Kit Contents: Diaphragm, diaphragm spring, check balls, check ball spring, pump pushrod, required hardware and o-rings

Fitment

This accelerator pump rebuild kit fits S&S Super E and S&S Super G carburetors. These carburetors are widely used on custom and performance Harley-Davidson applications including Shovelhead, Evolution (Evo), and Sportster-based builds, as well as many custom V-twin motorcycles running an S&S carburetor setup.

This kit is specific to the Super E and Super G carb families. It is not a universal fit — it will not work with S&S Super A/B carburetors, L-Series, GAL/MGAL, GBL, or MGL series carbs, which use different rebuild kits. If you are unsure which S&S carburetor you have, check the casting or refer to your carburetor's documentation before ordering.

What's in the Box

• 1x Accelerator pump diaphragm
• 1x Diaphragm spring
• Check balls
• Check ball spring
• 1x Pump pushrod
• Required hardware and o-rings

Why Buy from ThreePiece.us

• Free shipping on every order — no minimum required, so you can get your rebuild kit on the way without worrying about hitting a threshold.
• Affirm financing available — split your purchase into manageable payments, whether you're picking up a single rebuild kit or restocking multiple carb components at once.
• Expert fitment help — not sure if this is the right kit for your carb, or need guidance on what else to replace while you're in there? Our team can help you confirm compatibility and put together a complete parts list.

Frequently Asked Questions

Q: What carburetors does the S&S 11-2918 kit fit?
A: This kit is designed specifically for S&S Super E and Super G carburetors. It does not fit other S&S carburetor families such as the Super A/B, L-Series, or G/M/GAL series.

Q: What's included in the 11-2918 rebuild kit?
A: The kit includes a diaphragm, diaphragm spring, check balls, check ball spring, pump pushrod, and the required hardware and o-rings. It is a focused accelerator pump rebuild kit — it does not include needle seats, jets, or other carburetor body components. S&S offers separate body rebuild and master rebuild kits if a more comprehensive overhaul is needed.

Q: Is this a complete carburetor rebuild kit?
A: No — this kit addresses the accelerator pump circuit specifically. If you need a full carburetor overhaul, S&S also offers a Basic Rebuild Kit for Super E & Super G (110-0067) and separate body rebuild or master rebuild kits for a more thorough restoration.

Q: When should I replace the accelerator pump components on my S&S carb?
A: Common symptoms of a failing accelerator pump include a hesitation or bog when rolling on the throttle, a flat spot off idle, or a general lack of crisp throttle response. If your carburetor has been sitting unused for an extended period, the diaphragm and o-rings are likely dried out or cracked and should be inspected. Rebuilding the accelerator pump is a straightforward maintenance task that can restore the throttle feel your S&S carb was designed to deliver.