Motocross and enduro diaphragm leaves - flexibility, torque and perfect engine response

Motocross and enduro diaphragms (reed petals) are thin plates made of fiberglass or carbon that are responsible for opening and closing the diaphragm valve in a two-stroke engine. Their quality determines the engine's response to gas, torque and smooth operation in the lower rev range. At Bajamoto you will findmembrane leaves forKTM, Honda, Yamaha, Husqvarna, GasGas motorcycles from theBoyesen, ProX, Athena andFM-Parts brands.

Why are the membrane leaves so important?

In 2T engines, a diaphragm valve controls the flow of the fuel-air mixture. The leaves open and close hundreds of times per second - that's why they must be flexible, tight and perfectly matched. Worn or cracked lobes cause loss of compression, weak bottom end and uneven engine response.

• increases torque in the lower and mid-range,
• improve the engine's response to gas,
• stabilize operation at low speeds,
• increase mixture flow and power throughout the entire rev range,
• increases the durability of the diaphragm valve.

Types of motocross and enduro membrane leaves

• Carbon leaves – light, flexible, with quick response time, ideal for competition motorcycles
• Fiberglass leaves – more durable, ideal for training and amateur motorcycles
• OEM Replacement leaves – replacements with factory dimensions
• Racing leaves – Boyesen / Moto Tassinari designs with flow channels increasing power,
• Complete sets – leaves with seals and fasteners ready for installation.

Top brand of motocross and enduro membrane leaves

• Boyesen – iconic Power Reeds and Carbon Series, used in MXGP and EnduroGP,
• ProX – OEM Replacement blades with high precision,
• Athena – carbon and fiberglass sets for Japanese and European motorcycles,
• FM-Parts – Hard Enduro leaves resistant to impact and high temperature,
• Moto Tassinari – blades for VForce3 and VForce4 systems, improving air flow,
• VForce – racing blades for premium diaphragm valves.

How to choose membrane leaves for a motorcycle?

Each set of motocross and enduro diaphragm leaves from Bajamoto has a detailed description of compatibility with the motorcycle model and diaphragm valve type. Examples:

• Boyesen Power Reeds KTM EXC 250/300 2T 2017–2024
• ProX Reed Petals Yamaha YZ 125/250 2005–2023
• Athena Carbon Fiber Reed Petals Honda CR 250R 2002–2007

When selecting leaves, pay attention to the type of diaphragm valve - Boyesen, VForce, Moto Tassinari or OEM. Carbon leaves ensure faster response, and glass leaves ensure greater durability and stability.

How to care for the membrane leaves?

Check the condition of the leaves every 30-50 operating hours. Cracks, deformations or distortions cause the mixture to move back and lose compression. Always mount the leaves on a clean surface, with new screws and even pressure. After a longer season or after the engine seizes - replace the set of blades with new ones.

Response and power you will feel - with Bajamoto

Choose motocross and enduro membrane leaves from brands that build power for the best. WithBoyesen you will gain torque and flexibility,ProX andAthena will provide OEM fit, andFM-Parts will provide durability in hard enduro. With Bajamoto you will regain the response you can feel under the lever - from the first turn of the crank. 🔥

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