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Reed Valves and Petals

(18 products)
Carburetors Intake Manifolds Reed Valves and Petals Carburetor Accessories Jets Fuel System Air filter Injection System
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Product type
Intake kit
Brand
Italkit MotoForce Racing MVT MXS Racing Stage6 Stage6 R/T
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Stage6 R/T
Intake Kit Stage6 R/T PWK 28mm Piaggio 50 - 180cc
Article no.: S6-3914010

Intake Kit Stage6 R/T PWK 28mm Piaggio 50 - 180cc

296,10 €
In stock
329,00 €
-10% Set-Rabatt
MXS Racing
Intake Kit Big Valve MXS Racing 35mm (PWK / VHST) + Stage6 reed valve Minarelli vertical
Article no.: MS-PKMMXS010/2
4

Intake Kit Big Valve MXS Racing 35mm (PWK / VHST) + Stage6 reed valve Minarelli vertical

114,30 €
In stock
RRP
133,00 €
-14% Discount
MXS Racing
Intake Kit Big Valve MXS Racing HighFlow 35mm PWK / VHST Minarelli vertical
Article no.: MS-PKMMXS010/1
5

Intake Kit Big Valve MXS Racing HighFlow 35mm PWK / VHST Minarelli vertical

152,95 €
In stock
161,00 €
-5% Set-Rabatt
MotoForce Racing
Carburetor Kit 21 PWK MotoForce Racing Minarelli horizontal
Article no.: MF16.900101

Carburetor Kit 21 PWK MotoForce Racing Minarelli horizontal

166,60 €
In stock
170,00 €
-2% Set-Rabatt
MotoForce Racing
Intake Kit Motoforce Racing 35mm PWK / VHST Piaggio 50-180cc
Article no.: MF36.14001
10

Intake Kit Motoforce Racing 35mm PWK / VHST Piaggio 50-180cc

83,00 €
In stock
MotoForce Racing
Intake Kit Motoforce Racing PWK 21mm Piaggio 50 - 180
Article no.: MF66.164001

Intake Kit Motoforce Racing PWK 21mm Piaggio 50 - 180

144,90 €
In stock
RRP
149,00 €
-3% Discount
MVT
Intake System MVT Racing 35mm PWK / VHST Minarelli vertical
Article no.: MVT-CL80

Intake System MVT Racing 35mm PWK / VHST Minarelli vertical

54,00 €
In stock
RRP
64,00 €
-16% Discount
Italkit
Intake Kit Italkit Big Valve metal flange 35mm Derbi Variant Start
Article no.: IKLC.12.02

Intake Kit Italkit Big Valve metal flange 35mm Derbi Variant Start

95,00 €
In stock
RRP
132,00 €
-28% Discount
Stage6
Intake Kit Stage6 MK2 Oversize 24/35MM PHBG / PWK Minarelli vertical
Article no.: S6-3216800
76

Intake Kit Stage6 MK2 Oversize 24/35MM PHBG / PWK Minarelli vertical

103,00 €
In stock soon
RRP
114,00 €
-10% Discount
Stage6
Intake Kit Stage6 MK2 24/35mm PHBG / PWK Piaggio
Article no.: S6-3214000
16

Intake Kit Stage6 MK2 24/35mm PHBG / PWK Piaggio

105,00 €
In stock soon
RRP
116,00 €
-9% Discount
MVT
Intake Kit MVT Racing 35mm PWK / VHST Derbi EBE / D50B0
Article no.: MVT-CL20
4

Intake Kit MVT Racing 35mm PWK / VHST Derbi EBE / D50B0

54,00 €
In stock soon
RRP
64,00 €
-16% Discount
Stage6
Carburetor Kit Stage6 PWK 21mm Minarelli vertical
Article no.: MS-PKMADMI1
1

Carburetor Kit Stage6 PWK 21mm Minarelli vertical

236,70 €
Currently not in stock
263,00 €
-10% Set-Rabatt
Stage6
Intake Kit Stage6 PWK 21mm Peugeot vertical
Article no.: S6-3917501

Intake Kit Stage6 PWK 21mm Peugeot vertical

215,10 €
Currently not in stock
239,00 €
-10% Set-Rabatt
Stage6
Intake Kit Stage6 PWK 21mm Minarelli / China 2-stroke
Article no.: S6-3916601

Intake Kit Stage6 PWK 21mm Minarelli / China 2-stroke

211,50 €
Currently not in stock
235,00 €
-10% Set-Rabatt
Stage6
Intake Kit Stage6 PWK 21mm Piaggio 50 - 180cc
Article no.: S6-3914001

Intake Kit Stage6 PWK 21mm Piaggio 50 - 180cc

238,50 €
Currently not in stock
265,00 €
-10% Set-Rabatt
Stage6 R/T
Intake Kit Stage6 R/T PWK 28mm Minarelli / Yamaha Aerox
Article no.: S6-3916610

Intake Kit Stage6 R/T PWK 28mm Minarelli / Yamaha Aerox

434,70 €
Currently not in stock
483,00 €
-10% Set-Rabatt
Italkit
Intake Kit Italkit Big Valve 35mm PWK / VHST Puch Cobra 75
Article no.: IKLC.56.1

Intake Kit Italkit Big Valve 35mm PWK / VHST Puch Cobra 75

181,00 €
Currently not in stock
Italkit
Intake Kit Italkit Big Valve Double Prisma 35mm PWK / VHST Derbi Variant Start
Article no.: IKLC.12.03

Intake Kit Italkit Big Valve Double Prisma 35mm PWK / VHST Derbi Variant Start

162,00 €
Currently not in stock

Reed valve

The reed valve is a component found only on 2-stroke engines. It controls cylinder filling and extends the usable RPM range of the engine. Without a reed valve, engines would be weaker at low RPM and would deliver power much more abruptly.

Well-known brands such as Moto Tassinari, Stage6, Italkit, Polini, or Malossi offer high-quality reed valves for the most common models.

Performance improvement via reed valve

A reed valve can improve performance across the entire RPM range, as the cylinder is filled more efficiently and a higher flow rate is possible.

The material and thickness of the reed petals (steel, fiberglass, carbon, epoxy composite) also influence behavior at low or high RPM. As a general rule:

  • Thicker = stiffer = less torque, but possible gains at high RPM
  • Thinner = more flexible = better acceleration, but losses at high RPM

It is recommended to test different options and select the setup that best suits the vehicle.

Reed valve spacers are also available, allowing the crankcase volume to be increased.

Choosing the right reed valve

When setting up an engine, especially on 50cc scooters and gear bikes, the reed valve should match the cylinder kit. The more powerful the cylinder, the greater the flow capacity required from the reed valve.

Many manufacturers offer so-called “big valve” kits for tuned scooters such as Yamaha Aerox or Piaggio Zip, where the original reed valve is very small.

On geared motorbikes with Minarelli AM6 or Derbi engines, installing a larger reed valve often requires modification of the crankcase. Please take this into account.

In the motocross segment, Moto Tassinari offers V-Force reed valves, which are easy to install and provide improved flow. The thickness of the reed blades is already optimized for many common models (KTM SX, Yamaha YZ, Honda CR, etc.).

To simplify installation, complete intake kits are also available, including intake manifold, reed valve, and additional components.

Replacement reed petals for cost-effective repair

The reed valve can be replaced entirely, but this is often not necessary. The reed petals, or reed blades, move very quickly and are subject to high loads. They should be replaced regularly when they are no longer sealing properly.

A wide range of reed petals made of carbon, fiberglass, or metal is available.

There are also carbon reed sheets, allowing you to cut reed petals to a desired size, for example for less common models.

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