Motocross and enduro accelerator pump kits - fast throttle response and full 4T power

The motocross and enduro accelerator pump kit (accelerator pump repair kit) is a set of elements that are responsible for the proper operation of the mixture enrichment system when the throttle is suddenly opened. In four-stroke engines (4T), the accelerator pump is of key importance - when it works properly, it eliminates temporary "silting" of the engine and guarantees immediate response to gas. At Bajamoto you will find Keihin and Mikuni accelerator pump kits for KTM, Honda, Yamaha, Husqvarna, GasGas and other motorcycles - from the All Balls, ProX, Athena and Tourmax brands.

Why is the accelerator pump so important?

When you suddenly add gas, the engine needs to immediately enrich the mixture. If the accelerator pump does not work properly, the engine reacts with a delay, shoots into the intake or chokes when the throttle is suddenly opened. Replacing the repair kit restores the smooth and sharp response characteristic of a well-set Keihin FCR.

• eliminates the "gap" in acceleration,
• improves the engine's response to quick opening of the gas,
• stabilizes engine operation under sudden load,
• ensures uniform fuel dosing,
• restores the full efficiency of the pump and carburetor.

Types of motocross and enduro accelerator pump kits

• OEM Replacement Kits – fit for Keihin FCR, Mikuni TMX and VM,
• All Balls Sets – complete sets of membranes, springs and seals
• ProX sets – replacement elements with factory precision
• Athena sets – seals and membranes resistant to E10 fuel and high temperature
• FM-Parts sets – racing solutions for hard enduro and 4T sports motorcycles.

Top brands of motocross and enduro accelerator pump kits

• All Balls – complete repair kits for Keihin FCR and Mikuni,
• ProX – OEM quality diaphragms and springs
• Athena – premium sets made of Viton/NBR materials resistant to E10 fuel,
• Tourmax – Japanese precision and perfect match to Mikuni carburetors,
• FM-Parts – tuning kits for carburetors in 4T Racing engines.

How to choose an accelerator pump set?

Each motocross and enduro accelerator pump kit at Bajamoto has a detailed description of compatibility with the carburetor type and motorcycle model. Examples:

• All Balls Accelerator Pump Repair Kit Keihin FCR KTM EXC-F 250–500 2017–2024
• ProX Accelerator Pump Kit Honda CRF 250R/450R 2015–2023
• Athena Pump Diaphragm Mikuni TMX Yamaha YZF 250/450 2014–2023

Just check the carburetor marking (Keihin FCR, PWK, Mikuni TMX/VM) and the year of the motorcycle. The kits contain all the necessary elements - diaphragms, springs, valves and seals - ready for installation.

How to care for the accelerator pump?

After cleaning the carburetor, always check the condition of the diaphragm and pump spring. Cracks, wear or leaks cause a loss of pressure and a decrease in engine response. Use high-quality fuel and replace the filter regularly - dirt particles are the most common cause of pump damage. Once a season, it is worth replacing a set of membranes with a new one - especially in 4T motorcycles taking part in competitions.

The reaction that makes the difference – with Bajamoto

Choose motocross and enduro accelerator pump kits from brands that know how much a fraction of a second counts when stepping on the gas. With All Balls and ProX you will regenerate the pump like new, Athena will ensure the highest durability of the membranes, and FM-Parts will provide a racing response ideal for hard enduro. With Bajamoto you'll get what's best about four-strokes - instant power at your fingertips. ⚡

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