Motorcycle Reed Valve Systems
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- Moto Tassinari®VForce 3 Reed Valve System (V301A)VForce 3 Reed Valve System (V301A) by Moto Tassinari®. The VForce reed valve system by Moto Tassinari has been the reed valve system of choice by anyone serious about two-stroke engine performance for the last 10+ years. The simple...Double the reed tip surface over a conventional reed valve designIncreased bottom end, stronger mid-range and longer top-end$145.55
- Moto Tassinari®VForce 3 Reed Valve System (V2M09A)VForce 3 Reed Valve System (V2M09A) by Moto Tassinari®. The VForce reed valve system by Moto Tassinari has been the reed valve system of choice by anyone serious about two-stroke engine performance for the last 10+ years. The simple...Double the reed tip surface over a conventional reed valve designIncreased bottom end, stronger mid-range and longer top-end$145.55
- Moto Tassinari®VForce 3 Reed Valve System (V355B)VForce 3 Reed Valve System (V355B) by Moto Tassinari®. The VForce reed valve system by Moto Tassinari has been the reed valve system of choice by anyone serious about two-stroke engine performance for the last 10+ years. The simple...Double the reed tip surface over a conventional reed valve designIncreased bottom end, stronger mid-range and longer top-end$164.16
- Moto Tassinari®VForce 3 Reed Valve System (V355A)VForce 3 Reed Valve System (V355A) by Moto Tassinari®. The VForce reed valve system by Moto Tassinari has been the reed valve system of choice by anyone serious about two-stroke engine performance for the last 10+ years. The simple...Double the reed tip surface over a conventional reed valve designIncreased bottom end, stronger mid-range and longer top-end$164.16
- Moto Tassinari®VForce 3 Reed Valve System (V352A)VForce 3 Reed Valve System by Moto Tassinari®. The VForce reed valve system by Moto Tassinari has been the reed valve system of choice by anyone serious about two-stroke engine performance for the last 10+ years. The simple premise of...Double the reed tip surface over a conventional reed valve designIncreased bottom end, stronger mid-range and longer top-end$135.53
- Moto Tassinari®VForce 3 Reed Valve System (V351B)VForce 3 Reed Valve System (V351B) by Moto Tassinari®. The VForce reed valve system by Moto Tassinari has been the reed valve system of choice by anyone serious about two-stroke engine performance for the last 10+ years. The simple...Double the reed tip surface over a conventional reed valve designIncreased bottom end, stronger mid-range and longer top-end$136.39
- Moto Tassinari®VForce 3 Reed Valve System (V315A)VForce 3 Reed Valve System (V315A) by Moto Tassinari®. The VForce reed valve system by Moto Tassinari has been the reed valve system of choice by anyone serious about two-stroke engine performance for the last 10+ years. The simple...Double the reed tip surface over a conventional reed valve designIncreased bottom end, stronger mid-range and longer top-end$145.55
- Moto Tassinari®VForce 3 Reed Valve System (V3141-682A-3)VForce 3 Reed Valve System by Moto Tassinari®. The VForce reed valve system by Moto Tassinari has been the reed valve system of choice by anyone serious about two-stroke engine performance for the last 10+ years. The simple premise of...Double the reed tip surface over a conventional reed valve designIncreased bottom end, stronger mid-range and longer top-end$319.54
- Moto Tassinari®VForce 3 Reed Valve System (V306A-H)VForce 3 Reed Valve System (V306A-H) by Moto Tassinari®. The VForce reed valve system by Moto Tassinari has been the reed valve system of choice by anyone serious about two-stroke engine performance for the last 10+ years. The simple...Double the reed tip surface over a conventional reed valve designIncreased bottom end, stronger mid-range and longer top-end$145.55
- Moto Tassinari®VForce 4 Valve System (V4R01D)VForce 4 Valve System by Moto Tassinari®. The all-new VForce4 is built upon the solid foundation that has made the VForce3 such a success for the last 10 years. While the VForce3 has been continually refined over the years, this is a...Precise manufacturing and high-grade materialsCarefully developed for the highest level of quality$153.84
- Moto Tassinari®VForce 4 Valve System (V417A)VForce 4 Valve System (V417A) by Moto Tassinari®. The all-new VForce4 is built upon the solid foundation that has made the VForce3 such a success for the last 10 years. While the VForce3 has been continually refined over the years, this...Precise manufacturing and high-grade materialsCarefully developed for the highest level of quality$145.55
- Moto Tassinari®VForce 4R Reed Valve System (V4R82B-I)VForce 4R Reed Valve System (V4R82B-I) by Moto Tassinari®. The all-new VForce4 is built upon the solid foundation that has made the VForce3 such a success for the last 10 years. While the VForce3 has been continually refined over the...Double the reed tip surface over a conventional reed valve designIncreased bottom end, stronger mid-range and longer top-end$163.00
- Moto Tassinari®VForce 4R Reed Valve System (V4R85A)VForce 4R Reed Valve System by Moto Tassinari®. The all-new VForce4 is built upon the solid foundation that has made the VForce3 such a success for the last 10 years. While the VForce3 has been continually refined over the years, this...Double the reed tip surface over a conventional reed valve designIncreased bottom end, stronger mid-range and longer top-end$186.34
- Moto Tassinari®VForce 4R Reed Valve System (V4R26)VForce 4R Reed Valve System (V4R26) by Moto Tassinari®. The all-new VForce4 is built upon the solid foundation that has made the VForce3 such a success for the last 10 years. While the VForce3 has been continually refined over the...Double the reed tip surface over a conventional reed valve designIncreased bottom end, stronger mid-range and longer top-end$153.84
- Moto Tassinari®VForce 4R Reed Valve System (V4R04)VForce 4R Reed Valve System (V4R04) by Moto Tassinari®. The all-new VForce4 is built upon the solid foundation that has made the VForce3 such a success for the last 10 years. While the VForce3 has been continually refined over the...Double the reed tip surface over a conventional reed valve designIncreased bottom end, stronger mid-range and longer top-end$153.84
- Moto Tassinari®VForce 4R Reed Valve System (V301C)VForce 4R Reed Valve System (V301C) by Moto Tassinari®. The all-new VForce4 is built upon the solid foundation that has made the VForce3 such a success for the last 10 years. While the VForce3 has been continually refined over the...Double the reed tip surface over a conventional reed valve designIncreased bottom end, stronger mid-range and longer top-end$145.55
- Boyesen®Power Reeds (028)Power Reeds by Boyesen®. The new 2012 Power Reed is the next level in Trial-specific performance. Dual-stage reeds work in unison to perform efficiently throughout the entire powerband. This translates into quicker acceleration, crisper...Advanced design for exceptional performanceProven to deliver long-lasting service life$103.13
- Boyesen®Pro Series Reeds (PSR-106)Pro Series Reeds by Boyesen®. Boyesen Pro Series Reeds combine breakthrough carbon technology with all the advantages of Boyesen's dual-stage Power Reed. This top-grade product is expertly made in compliance with stringent industry...Advanced design for exceptional performanceProven to deliver long-lasting service life$53.12
- Boyesen®Pro Series Reeds (PSR-156)Pro Series Reeds by Boyesen®. Boyesen Pro Series Reeds combine breakthrough carbon technology with all the advantages of Boyesen's dual-stage Power Reed. This top-grade product is expertly made in compliance with stringent industry...Advanced design for exceptional performanceProven to deliver long-lasting service life$53.12
- Boyesen®Pro Series Reeds (PSR-169)Pro Series Reeds (PSR-169) by Boyesen®. Boyesen Pro Series Reeds combine breakthrough carbon technology with all the advantages of Boyesen's dual-stage Power Reed. This top-grade product is expertly made in compliance with stringent...Advanced design for exceptional performanceProven to deliver long-lasting service life$57.22
- Boyesen®Pro Series Reeds (PSR-68)Pro Series Reeds by Boyesen®. Boyesen Pro Series Reeds combine breakthrough carbon technology with all the advantages of Boyesen's dual-stage Power Reed. This top-grade product is expertly made in compliance with stringent industry...Advanced design for exceptional performanceProven to deliver long-lasting service life$53.12
- Boyesen®Pro Series Reeds (PSR-121)Pro Series Reeds by Boyesen®. Boyesen Pro Series Reeds combine breakthrough carbon technology with all the advantages of Boyesen's dual-stage Power Reed. This top-grade product is expertly made in compliance with stringent industry...Advanced design for exceptional performanceProven to deliver long-lasting service life$53.12
- Boyesen®Pro Series Reeds (PSR-104)Pro Series Reeds by Boyesen®. Boyesen Pro Series Reeds combine breakthrough carbon technology with all the advantages of Boyesen's dual-stage Power Reed. This top-grade product is expertly made in compliance with stringent industry...Advanced design for exceptional performanceProven to deliver long-lasting service life$53.12
- Boyesen®Pro Series Reeds (PSR-105)Pro Series Reeds by Boyesen®. Boyesen Pro Series Reeds combine breakthrough carbon technology with all the advantages of Boyesen's dual-stage Power Reed. This top-grade product is expertly made in compliance with stringent industry...Advanced design for exceptional performanceProven to deliver long-lasting service life$53.12
- Boyesen®Pro Series Reeds (PSR-129)Pro Series Reeds by Boyesen®. Boyesen Pro Series Reeds combine breakthrough carbon technology with all the advantages of Boyesen's dual-stage Power Reed. This top-grade product is expertly made in compliance with stringent industry...Advanced design for exceptional performanceProven to deliver long-lasting service life$46.58
- Boyesen®RAD Valve (RAD-30)RAD Valve by Boyesen®. Patented, one piece, cast aluminum Reed Block system that delivers guaranteed bolt on performance. Carb boot, Carb boot clamp and gasket provided. No modifications required.Advanced design for exceptional performanceProven to deliver long-lasting service life$188.50
- Boyesen®RAD Valve (RAD-33F)RAD Valve by Boyesen®. Patented, one piece, cast aluminum Reed Block system that delivers guaranteed bolt on performance. Carb boot, Carb boot clamp and gasket provided. No modifications required.Advanced design for exceptional performanceProven to deliver long-lasting service life$199.59
- Boyesen®RAD Valve (RAD-30B)RAD Valve by Boyesen®. Patented, one piece, cast aluminum Reed Block system that delivers guaranteed bolt on performance. Carb boot, Carb boot clamp and gasket provided. No modifications required.Advanced design for exceptional performanceProven to deliver long-lasting service life$188.52
- Boyesen®RAD Valve (RAD-21I)RAD Valve by Boyesen®. Patented, one piece, cast aluminum Reed Block system that delivers guaranteed bolt on performance. Carb boot, Carb boot clamp and gasket provided. No modifications required.Advanced design for exceptional performanceProven to deliver long-lasting service life$164.79
- Boyesen®RAD Valve (RAD-21E)RAD Valve by Boyesen®. Patented, one piece, cast aluminum Reed Block system that delivers guaranteed bolt on performance. Carb boot, Carb boot clamp and gasket provided. No modifications required.Advanced design for exceptional performanceProven to deliver long-lasting service life$164.79
In a two-stroke engine, the piston works like a pump sucking the fresh air-fuel mixture into the crankcase. Does the motor really need a check valve in the air intake? Of course, it can work perfectly well using just a plain piston-port system, but the valve allows for increasing engine performance. There are two main kinds of such devices – the rotary disc valves, which were popular in the 60s, and the reed ones. The former are much more complex, more expensive, and less reliable. The latter are simpler and good enough for most applications including motocross.
Installed between the engine and carburetor, or even bolted directly to the crankcase, the reed valve prevents some part of the mixture from going back to the intake thus ensuring more power. Typically, it's composed of two or more flexible petals mounted onto a wedge-shaped cage. When the piston creates a low-pressure zone in the crankcase, these petals open to let the mixture inside the engine. The number, material, and size of these parts can differ in various models, but the main principle remains the same. However, there are some traits peculiar to each model, and they influence the valve's lifespan and its efficiency at low or high RPM.
The cage's design can also vary influencing performance. In general, its volume has to be approximately the same as the volume of the crankcase and carburetor in order not to create restrictions to the flow. There can be multiple shorter petals or one large petal laying over another one, like in a dual-stage system by Boyesen; such solutions are meant for better throttle response and higher torque throughout the powerband. Our online store offers reed valves, rebuild kits, gaskets, boots, and related components made by Moto Tassinari, Boyesen, and other reliable companies that dominate the market these days. We carry both carbon fiber and fiberglass reeds featuring sufficiently light weight and durability to meet the highest expectations.